Release Notes for Cisco 7000 Family and Cisco 12000 Series Routers for Cisco IOS Release 12.0 S December 11, 2000 Cisco IOS Release 12.0(14)S Text Part Number 78-7130-11 Rev. B0 These release notes for Cisco 7000 family and Cisco 12000 series routers support Cisco IOS Release 12.0 S, up to and including Release 12.0(14)S. These release notes are updated as needed to describe new features, memory requirements, hardware support, software platform deferrals, and changes to the microcode and related documents.
Introduction • Obtaining Documentation, page 110 • Obtaining Technical Assistance, page 110 Introduction Cisco IOS Release 12.0(5)S was the first public release of this software. Many of the features and hardware support in this software have previously been released to customers on other software releases. For information on new features and Cisco IOS commands supported by Release 12.0 S, see the “New and Changed Information” section on page 11 and the “Related Documentation” section on page 105.
System Requirements Table 3 Memory Requirements for the Cisco 12000/GSR Series Platform Feature Set by Router Image Name Required Flash Memory Required DRAM Memory Runs from Service Provider gsr-p-mz 16 MB 128 MB RAM Service Provider/ Secured Shell 56 gsr-k3p-mz 16 MB 128 MB RAM Service Provider/ Secured Shell 3DES gsr-k4p-mz 16 MB 128 MB RAM Hardware Supported Cisco IOS Release 12.
System Requirements Note The Cisco 7000 series previously included the Cisco 7000 and 7010 routers. These products are not supported in Cisco IOS Release 12.0 S. The Cisco 7000 series now includes the Cisco 7000 equipped with the RSP7000 processor and the Cisco 7010 equipped with the RSP7000 processor. Table 4 Cisco 7500/RSP Series Routers Microcode Versions Processor or Module Current Microcode Version Minimum Version Required AIP (ATM Interface Processor) 20.18 20.
System Requirements Note Table 5 This feature set table only contains a selected list of features. This table is not cumulative—nor does it list all the features in each image.
System Requirements Table 5 Feature List by Feature Set for the Cisco 7200 Series (continued) Feature Sets Features In Service Provider Service Provider/ Secured Shell 56 Service Provider/ Secured Shell 3DES Named Community Lists (10) Yes Yes Yes New Revision of System Controller Chip (9) for NPE-175/NPE-225 Yes Yes Yes NPE-175/NPE-225 (6) Yes Yes Yes NPE-300 (5) Yes Yes Yes NPE-400 (14) Yes Yes Yes OC-12c Dynamic Packet Transport (DPT) Port Adapter (6) Yes Yes Yes PA-MC
System Requirements Table 6 Feature List by Feature Set for the Cisco 7500/RSP Series Feature Sets Features In Service Provider Service Provider/ Secured Shell 56 Service Provider/ Secured Shell 3DES ATM PVC Trap Support (5) Yes Yes Yes Available Bit Rate Servicing and Virtual Path Shaping on PA-A3 Port Adapters (5) Yes Yes Yes BGP Policy Accounting (9) Yes Yes Yes Cisco 7500 Single Line Card Reload (13) Yes Yes Yes Cisco 7576 Router (5) Yes Yes Yes Class-Based Quality of Se
System Requirements Table 6 Feature List by Feature Set for the Cisco 7500/RSP Series (continued) Feature Sets Service Provider Service Provider/ Secured Shell 56 Service Provider/ Secured Shell 3DES Multichannel STM-1 Port Adapter for the (14) Cisco 7500 Series Router Yes Yes Yes Multiport T1/E1 ATM Port Adapters with (11) Inverse Multiplexing over ATM Yes Yes Yes Named Community Lists (10) Yes Yes Yes NetFlow Policy Routing (6) Yes Yes Yes OC-12c Dynamic Packet Transport (DPT) Port
System Requirements Table 7 Feature List by Feature Set for the Cisco 12000 Series Feature Sets Features In Service Provider Service Provider/ Secured Shell 56 Service Provider/ Secured Shell 3DES 1OC-12/STM-4 SRP Line Card (6) Yes Yes Yes 1OC-48/STM-16 SRP Line Card (11) Yes Yes Yes 2 x 32-Bit Counters (10) Yes Yes Yes 3-Port Gigabit Ethernet Line Card (11) Yes Yes Yes 6-Port Channelized T3-SMB Line Card (13) Yes Yes Yes 6DS3-SMB Line Card (6) Yes Yes Yes 8-Port Fast E
System Requirements Table 7 Feature List by Feature Set for the Cisco 12000 Series (continued) Feature Sets Features In Service Provider Service Provider/ Secured Shell 56 Service Provider/ Secured Shell 3DES ifIndex Persistence (11) Yes Yes Yes IP Packet Marking (13) Yes Yes Yes MPLS Switching Support for Gigabit Ethernet (7) Yes Yes Yes MPLS-TE A.
New and Changed Information Table 7 Feature List by Feature Set for the Cisco 12000 Series (continued) Feature Sets Features In Service Provider Service Provider/ Secured Shell 56 Service Provider/ Secured Shell 3DES Turbo Access Control Lists (ACLs) (6) Yes Yes Yes Virtual Path Traffic Shaping (8) Yes Yes Yes Weighted Random Early Detection (WRED) (10) Yes Yes Yes 1. SDCC is supported on GSR OC-48-based line cards. New and Changed Information • New Features in Cisco IOS Release 12.
New and Changed Information Cisco 7200-I/O-GE+E and Cisco 7200-I/O-2FE/E Input/Output Controllers Platforms: Cisco 7200 series The Cisco 7200-I/O-GE+E is an Input/Output controller that provides one Gigabit Ethernet and one Ethernet port. It is equipped with a Gigabit Interface Converter (GBIC) receptacle for 1000 Mbps operation and an RJ-45 receptacle for 10 Mbps operation.
New and Changed Information ICMP Rate Limiting on Engine 2 POS Line Cards Platforms: Cisco 12000 series The ICMP rate limiting on Engine 2 Packet-over-SONET (POS) line card feature is used to rate-limit ICMP echo-reply traffic in order to protect hosts against Denial of Service (DoS) attacks.
New and Changed Information NetFlow Export Version 5 Platforms: Cisco 12000 series Cisco IOS Release 12.0 S now supports NetFlow Export version 5 on the Cisco 12000 series GSR. The version 5 export format can be enabled along with traditional NetFlow and Sampled NetFlow features. The NetFlow Export Version 5 feature provides the ability to export fine granularity data to the NetFlow collector. Per-flow information and statistics are maintained and uploaded to the workstation.
New and Changed Information New Features in Cisco IOS Release 12.0(13)S Many of the new features in Cisco IOS Release 12.0 S were introduced in other Cisco IOS releases. For more complete information, refer to the original release. 6-Port Channelized T3-SMB Line Card Platforms: Cisco 12000 series The 6CT3-SMB line card consists of high-density digital signal level 3 (DS3) service through six copper T3 ports. T3 transmits DS3-formatted data at 44.
New and Changed Information IP Packet Marking Platforms: Cisco 12000 series The IP Packet Marking feature is implemented on the PSA (hardware) and line card CPU (software) on Engine 2 line cards. In the context of this feature, packet marking means setting or changing the 3-bit precedence value in the Type of Service (ToS) field of IP packets that are received on an interface by a user-configured value on the interface.
New and Changed Information Event MIB Platforms: Cisco 7200 series, Cisco 7500/RSP series, Cisco 12000 series The Event MIB is an asynchronous notification mechanism standardized for use by network management systems using Simple Network Management Protocol (SNMP). The Event MIB provides the ability to monitor MIB objects on a local or remote system using SNMP and to initiate simple actions whenever a trigger condition is met.
New and Changed Information Multicast Source Discovery Protocol MIB Platforms: Cisco 7200 series, Cisco 7500/RSP series The Multicast Source Discovery Protocol (MSDP) MIB feature adds support in Cisco IOS software for the MSDP MIB. This MIB describes objects used for managing MSDP operations using Simple Network Management Protocol (SNMP). Documentation for this MIB exists in the form of an Internet Draft titled “Multicast Source Discovery Protocol MIB” (draft-ietf-msdp-mib-03.
New and Changed Information The 1OC-48/STM-16 SRP line card allows networks to: • Provide transmit packet priority with 3 separate queues to prevent head-of-line blocking: – Control packets are never rate-shaped or back-pressured by the Ring Access Controller (RAC) – High-priority packets are rate-shaped by the RAC – Low-priority packets are rate-shaped by the RAC • Priority-map 8 levels IP/SRP into 2 levels of priority (high and low) – Software-selectable rate shaping (rate=X or no shaping) for both hi
New and Changed Information relevant bits of which are ported into this development. The double switching is performed by handling the received IP packet in the existing code path until it is determined that the packet needs encapsulation or de-encapsulation, at which point the necessary actions are performed, and the resultant IP packet is recursively forwarded through the IP switching path again. See the following document for further information: http://www.cisco.
New and Changed Information Multiport T1/E1 ATM Port Adapters with Inverse Multiplexing over ATM Platforms: Cisco 7200 series, Cisco 7500/RSP series The inverse multiplexing over ATM (IMA) port adapter is a single-width port adapter that allows Cisco 7100 series, Cisco 7200 series, and Cisco 7500 series routers to support inverse multiplexing over ATM. These port adapters allow WAN uplinks at speeds ranging from 1.544 Mbps to 12.288 Mbps for T1 connections and from 2.048 Mbps to 16.
New and Changed Information WCCP Enhancements Platforms: Cisco 7200 series, Cisco 7500/RSP series WCCP enhancements add support for WCCP Version 2 for Cisco IOS Release 12.0(11)S. The WCCP feature allows you to use Cisco cache engines or third-party cache engines to handle web traffic, reducing transmission costs and downloading time. This traffic includes user requests to view pages and graphics on World Wide Web servers, whether internal or external to your network, and the replies to those requests.
New and Changed Information New Features in Cisco IOS Release 12.0(10)S Many of the new features in Cisco IOS Release 12.0 S were introduced in other Cisco IOS releases. For more complete information, refer to the original release. 2 x 32-Bit Counters Platforms: Cisco 12000 series Cisco IOS Release 12.0 S now supports 2 x 32-bit counters.
New and Changed Information Access List Performance Improvements for Cisco 12000 Gigabit Switch Routers Platforms: Cisco 12000 series Access list (ACL) performance improvements are provided for two types of Cisco 12000 line cards: • Line cards using engine 1 architecture • Line cards using engine 2 architecture The ACL performance improvement is implemented in a slightly different way depending on the line card type.
New and Changed Information MPLS over Frame Relay Platforms: Cisco 7200 series, Cisco 7500/RSP series Transmission of Multiprotocol Label Switching (MPLS)-encapsulated packets across a point-to-point Frame Relay subinterface is now supported. Configuration of the feature is identical to configuration of MPLS on any other interface type: (config)# interface Serial1/0.1 point-to-point (config-if)# tag ip or (config-if)# mpls traffic-engineering tunnels Note that some Frame Relay features (for example, FRF.
New and Changed Information Section Data Communications Channel Platforms: Cisco 12000 On Cisco GSR OC-48 based line cards, Cisco IOS Release 12.0 S now supports the IP/Section Data Communications Channel (SDCC) interface that is available on the Cisco OC-48 Optical Regenerator. To enable this feature, enter the sdcc enable command in configuration mode. To disable this feature, enter the no sdcc enable command. See the following document for further information: http://www.cisco.
New and Changed Information New Features in Cisco IOS Release 12.0(9)S Many of the new features in Cisco IOS Release 12.0 S were originally introduced in other Cisco IOS releases. For more complete information, refer to the original release. BGP Policy Accounting Platforms: Cisco 7200 series; Cisco 7500/RSP series, Cisco 12000 series BGP Policy Accounting provides a means of charging customers according to the route that their traffic travels.
New and Changed Information The Low Latency Queueing feature provides strict priority queueing for CBWFQ, reducing jitter in voice conversations. Configured by the priority command, Low Latency Queueing enables use of a single, strict priority queue within CBWFQ at the class level, allowing you to direct traffic belonging to a class to the CBWFQ strict priority queue. In the event of congestion, when the bandwidth is exceeded, policing is used to drop packets.
New and Changed Information Router-ports Group Management Protocol (RGMP) Platforms: Cisco 7200 series, Cisco 7500/RSP series, Cisco 12000 series Router-Port Group Management (RGMP) is a new protocol that restricts multicast traffic to router ports. CGMP (Cisco Group Management Protocol) and IGMP (Internet Group Management Protocol) are two existing features that restrict multicast traffic to hosts that do not need to receive them, reducing the amount of processing the hosts have to do.
New and Changed Information Fast EtherChannel Support on Cisco 7200 Platform Platforms: Cisco 7200 series Fast EtherChannel is now supported on Cisco 7200 series routers. The Fast EtherChannel feature allows multiple Fast Ethernet point-to-point links to be bundled into one logical link to provide bidirectional bandwidth of up to 800 Mbps. For more information on Fast EtherChannel, see the original feature guide written for the 11.1 CC Release, Fast EtherChannel, at the following location: http://www.
New and Changed Information Virtual Path Traffic Shaping Platforms: Cisco 12000 series Virtual path (VP) traffic shaping allows multiple virtual circuits (VCs) to be bundled into one VP. This “bundling” is also called traffic shaping because all VCs bundled within the VP are shaped as one traffic rate. In addition, bundling the VCs improves the error detection for the bundled VCs. New Features in Cisco IOS Release 12.0(7)S Many of the new features in Cisco IOS Release 12.
New and Changed Information In a link layer network such as Frame Relay, the network sends messages with the forward explicit congestion notification (FECN) or backward explicit congestion notification (BECN) if there is congestion. With the dTS feature, the traffic shaping adaptive mode takes advantage of these signals and adjusts the traffic descriptors, which approximates the rate to the available bandwidth along the path.
New and Changed Information Per-VC Queueing Platforms: Cisco 12000 series The per-virtual circuit (VC) queueing enhancements for the Quad OC-3c/STM-1c ATM line card provide additional control of traffic management on the line card. Within limits, you can adjust queuing priorities for each VC defined on a line card interface. This feature lessens traffic congestion and improves quality of service (QoS).
New and Changed Information 8-Port Fast Ethernet Line Card Platforms: Cisco 12000 series The 8-Port Fast Ethernet line card provides eight Fast Ethernet (IEEE 802.3u) interfaces that operate at a full-duplex data rate of 100 Mbps each. This line card connects to the Gigabit Switch Router (GSR) switch fabric, which supports transfer rates of up to 40 Gbps within the GSR. The 8-Port Fast Ethernet line card supports both copper and fiber-optic Fast Ethernet transceivers.
New and Changed Information NPE-175/NPE-225 Platforms: Cisco 7200 series The network processing engine is available in five versions: NPE-150, NPE-175, NPE-200, NPE-225, and NPE-300. The network processing engines have the same functionality; however, the performance differs because of the microprocessor type and the type of memory for packet data (SRAM and DRAM, or SDRAM) each network processing engine provides.
New and Changed Information SNMPv3 Platforms: Cisco 7200 series, Cisco 7500/RSP series, Cisco 12000 series Simple Network Management Protocol version 3 (SNMPv3) addresses issues related to the large-scale deployment of SNMP for configuration, accounting, and fault management. Currently SNMP is predominantly used for monitoring and performance management. The primary goal of SNMPv3 is to define a secure version of the SNMP protocol.
New and Changed Information New Features in Cisco IOS Release 12.0(5)S Many of the new features in Cisco IOS Release 12.0 S were originally introduced in other Cisco IOS releases. For more complete information, refer to the original release.
New and Changed Information There are bays for up to two AC-input or DC-input power supplies. The Cisco 7576 router will operate with one power supply. Although a second power supply is not required, a second power supply allows load sharing and increased system availability. See the following document for further information: http://www.cisco.com/univercd/cc/td/doc/product/core/cis7576/index.
New and Changed Information Gigabit Ethernet Line Card Platforms: Cisco 12000 series The Gigabit Ethernet line card provides Cisco 12000 series routers with an optical Ethernet interface on a single card that operates faster than 1 Gbps. The card interfaces with the switch fabric in the Cisco 12000 series router and provides one Gigabit Ethernet SC single-mode or multimode connection.
New and Changed Information Prior to MBGP, the only way to perform interdomain multicast routing was to use the BGP infrastructure that was in place for unicast routing. If those routers were not multicast capable, or you had differing policies where you wanted multicast traffic to flow, you could not support it. See the following document for further information: http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120t/120t7/mbgp.
New and Changed Information reports, if any. You then troubleshoot your multicast environment as normal, perhaps using the mtrace command from the source to the Test Receiver. If the show command displays no error reports, the Test Receiver is receiving test packets without loss or duplicates from the Test Sender.
New and Changed Information NPE-300 Platforms: Cisco 7200 series The network processing engine NPE-300 is the newest and the highest performance processor in the family of network processing engines for the Cisco 7200 series routers. The NPE-300 performs at a rate of approximately 300,000 packets per second (pps) in fast switching, a 50 percent increase over the NPE-200 performance. The NPE-300 uses a high-performance 262.
New and Changed Information PA-MC-E3 Multichannel E3 Synchronous Serial Port Adapter Platforms: Cisco 7200 series, Cisco 7500/RSP series The PA-MC-E3 Multichannel E3 synchronous serial port adapter is available on Cisco 7200 series routers, Cisco 7500 series routers, and Cisco 7000 series routers with the 7000 Series Route Switch Processor (RSP7000) and 7000 Series Chassis Interface (RSP7000CI). The PA-MC-E3 has one channelized E3 high-speed serial interface that provides access to services at E1 (2.
New and Changed Information Secure Shell Version 1 Platforms: Cisco 7200 series, Cisco 7500/RSP series, Cisco 12000 series Secure Shell (SSH) is a protocol that provides a secure, remote connection to a router. Two versions of SSH are available, SSH Version 1 and SSH Version 2. Only SSH Version 1 is implemented in Cisco IOS software. The SSH server feature enables an SSH client to make a secure, encrypted connection to a Cisco router.
New and Changed Information • CSCdr76940—MPLS loadsharing inconsistincy for 0.0.0.0 • CSCds56717—sh tag for shows untagged while remote binding is available • CSCds58727—cannot ping across mpls te tunnel • CSCdr42215—SRP needs to run service downl - fl to upgrade rom vers permanentl • CSCdp24155—ISIS:(route-leaking) local L2 interfaces not redistributed into L1 This release has been replaced with the following software solution(s), which are available on CCO: • 12.
Caveats Caveats Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most serious caveats; severity 2 caveats are less serious. This section contains only open caveats for the current Cisco IOS 12.0 S maintenance release. Because Cisco IOS Release 12.0 S is based on Cisco IOS Release 12.0, many caveats that apply to Cisco IOS Release 12.0 will apply to Cisco IOS Release 12.0 S. For information on severity 1 and 2 caveats in Cisco IOS Release 12.
Caveats • CSCdr06282 A Cisco RSP8 Route Switch Processor (RSP) might run out of buffer headers used for communication between the Versatile Interface Processors (VIPs) and the RSP. This situation usually occurs on a Cisco 7500 series router that is configured with several T1 port adapters (PAs). Communication between the VIP and the RSP is adversely affected, and messages, such as the VIP notifying the RSP that a line has gone down, might not be completed.
Caveats • CSCdr78008 A Cisco 7200 series router with hardware compression enabled on BRI interfaces might pause indefinitely, and console access will be lost. Workaround: Disable the hardware compression on the affected interfaces, or use software compression.
Caveats The show controllers privileged EXEC command on the Versatile Interface Processor (VIP) card shows the following error messages: Tx bad vc 6 Syslog show : %CBUS-4-FIXBADTXVC: Detected and fixed bad tx vc encap on Serial2/1/0/26:0, bad vc 0, fixed vc 24 LINK-2-INTVULN: In critical region with interrupt level=0, intfc=Serial1/0:22 -Process= "ct3sw_periodic 1", ipl= 0, pid= 48 Workaround: Type tx-limit 5 on the interface and change the queuing mechanism.
Caveats • CSCdr63002 When a Border Gateway Protocol (BGP) inbound route map is configured for a neighbor but the route map is not defined, then the first prefix in the update is rejected. All other prefixes in the update are accepted. Workaround: Correct the configuration to remove the configured route map for the neighbor or to create a corresponding route-map.
Caveats • CSCdp58522 Cisco OC-48c/STM16c and Cisco QOC-12 line cards for the Cisco 12000 series Gigabit Switch Router (GSR) are not differentiating outgoing traffic by protocol type. There is no workaround. • CSCdp74436 Entering the write memory command simultaneously on both the console and a vty might cause a Cisco router to pause indefinitely. The write memory command should not be entered simultaneously on different vtys. There is no workaround.
Caveats • CSCdr64558 If a redundant power supply on a Cisco 12012 Gigabit Switch Router (GSR) is disabled and later reenabled, the GSR might report alarms that relate to fan speed. There is no workaround. • CSCdr68063 A Cisco 12000 series Gigabit Switch Router (GSR) may reload if more than 1500 Multiprotocol Label Switching (MPLS) tunnels are configured. There is no workaround.
Caveats tunnel. While the tunnel is down, traffic may be dropped or may traverse normally routed, best-effort paths. The tunnels are normally restored within several seconds, but in some cases the tunnels may not be restored for several minutes. This situation has occurred in Cisco IOS Release 12.0 S images that support MPLS Traffic Engineering and may occur in any release that supports MPLS Traffic Engineering. There is no workaround.
Caveats • CSCds14076 A Cisco 12000 series Gigabit Switch Router (GSR) that is running the gsr-p-mz.120-11.5.S image with 4-Port OC-12 and OC-48 Packet-over-SONET (POS) line cards might experience a condition where the line protocol does not come up when PPP encapsulation and IP access lists are configured on the interface. Workaround: Use High-Level Data Link Control (HDLC) encapsulation and access lists, or use PPP encapsulation and remove IP access lists from the interface.
Caveats • CSCds35017 A Cisco 12000 series Gigabit Switch Router (GSR) might reload when a map list entry that was just configured is reconfigured. There is no workaround. • CSCds39506 A Cisco 7500 series router that is functioning as a Multiprotocol Label Switching (MPLS) Provider router and is running a release later than Cisco IOS Release 12.0(9.3)S might not be able to properly forward MPLS packets that are coming into the router and are meant to be going out the ATM PPP interface.
Caveats experiencing this condition is dropped with no indication of the drop in the counters or any other indication of failure. Traffic that is generated by the GRP (for example, Internet Control Message Protocol (ICMP) packets, Border Gateway Protocol (BGP) traffic, and OSPF protocol traffic) passes under these circumstances. Workaround: Reload the line card.
Caveats • CSCds30456 Entering the shutdown interface configuration command followed by the no shutdown interface configuration command on a Gigabit Ethernet Interface Processor (GEIP) may cause an “output stuck” condition and a complex restart. There is no workaround. Resolved Caveats—Cisco IOS Release 12.0(14)S All the caveats listed in this section are resolved in Cisco IOS Release 12.0(14)S. This section describes only severity 1 and 2 caveats.
Caveats Self decompressing the image : ################################################# ################################################################################ ################################################################################ ################################################################################ ################################################################################ ################################################################################ #################
Caveats IP Routing Protocols • CSCdr49641 A Cisco router that is running Cisco IOS Release 12.0(10)S and that receives a large packet that was fragmented before receipt may display the following error message at the rendezvous point of a Multicast network that is running Protocol Independent Multicast (PIM) sparse mode: %PIM-5-REG_ENCAP_INVALID: Bad register from for (, ). Trace = ....
Caveats • CSCds20926 A router that is running Open Shortest Path First (OSPF) may reload during redistribution testing. This situation has only been seen in development-testing environments, where different routing protocols are configured and unconfigured quickly. Race conditions occur if these protocols are redistributed into OSPF, which forces the router to reload. This situation does not occur in normal operating environments where routing protocols are never removed. There is no workaround.
Caveats • CSCdr31064 Under rare conditions, the Cisco 12000 series Gigabit Switch Router (GSR) switch fabric redundancy system may experience line card reloads and interprocess communction (IPC) errors while recovering from a Clock Scheduler Card (CSC) hardware failure. This problem is more frequent under high traffic load. There is no workaround. • CSCdr61724 Resolution of recursive routes by Cisco Express Forwarding (CEF) may add 1 to 15 seconds to the end-to-end route convergence time.
Caveats • CSCds09570 A Cisco 12000 Gigabit Switch Router (GSR) line card might reload if input MAC accounting is configured on a Gigabit Ethernet (GE) port on a 3-port GE line card. There is no workaround. • CSCds11405 When encapsulation Frame Relay is enabled on a Packet-over-SONET (POS) interface with multiple subinterfaces, the following error message may be seen in the log: SLOT 5:21:43:50: %LC-3-OUTINFO: Adj/midb(MDS 224.0.0.
Caveats • CSCds16953 After a microcode reload, packets that are traveling through a Cisco 7500/RSP series router may get process-switched instead of getting distributed Cisco Express Forwarding (dCEF)-switched. This situation impacts the performance of the router. If the packets get process-switched while Distributed Multilink PPP (DML-PPP) is running, CPU utilization may reach close to 100 percent with 5 to 6 T1s. There is no workaround.
Caveats • CSCds21669 If a Cisco 7500/RSP series router is booted with Multilink PPP (MLPPP) running and then distributed Cisco Express Forwarding (dCEF) switching is enabled after the router comes up, distributed MLPPP (DMLPPP) does not come up. In this situation, packets will not be distribute switched. Instead, the switching would be done by the RSP depending on the type of switching that is configured. There is no workaround.
Caveats though it successfully created an LVC when the ATM driver actually failed to complete the request. The output of the show atm vc privileged EXEC command shows the LVC in the INACTIVE state, so the destination cannot be pinged over the affected LVC.
Caveats • CSCds46872 Configuring IP accounting on a Cisco 12000 series Gigabit Switch Router (GSR) by entering the ip accounting interface configuration command halts all traffic through the router. This situation does not occur if the ip accounting mac-address command is used. Workaround: Use the ip accounting mac-address command. • CSCds49677 The number of adjacencies a Gigabit Ethernet line card will support in this release is 32k without 802.1Q and 21k with 802.1Q.
Caveats Wide-Area Networking • CSCds30986 Both 2x32-bit and 64-bit counters are incorrect when using Packet-over-SONET with Frame Relay encapsulation on subinterfaces. There is no workaround. Resolved Caveats—Cisco IOS Release 12.0(13)S All the caveats listed in this section are resolved in Cisco IOS Release 12.0(13)S. This section describes only severity 1 and 2 caveats.
Caveats EXEC and Configuration Parser • CSCdr53609 Deleting one serial subinterface from the running configuration on a Cisco 7500/RSP series router with a Route Switch Processor 4 (RSP4) that is running Cisco IOS Release 12.0(9)S or 12.0(10.3)S1 will cause the whole interface to disappear. Workaround: Add the interface that was deleted back to the configuration.
Caveats Temporary workaround: Remove the incoming ATM subinterface, and then add a new subinterface that has the same configuration. (See the following example, in which multicast traffic comes in at ATM4/1/0.3.) This action will cause MDS to function normally and the switching to be performed by the VIP. Please note, however, that once the router is rebooted, MDS will start to fail again. ! interface ATM4/1/0.3 point-to-point ip address 192.168.100.1 255.255.255.
Caveats • CSCdr02061 On the output Versatile Interface Processor (VIP) interfaces of a Cisco 7500/RSP that is running Cisco IOS Release 12.0 S, Multiprotocol Label Switching (MPLS) packets are not classified correctly for Distributed Weighted Random Early Detection (DWRED) and Distributed Weighted Fair Queueing (DWFQ). In this situation, all MPLS packets will be considered class 0 by these algorithms regardless of the actual value of their MPLS experimental field values. There is no workaround.
Caveats • CSCdr49601 A Gigabit Ethernet Interface Processor (GEIP) on a Cisco 7500 series router may experience receiving problems that cause the router to pause indefinitely. Workaround: Disable dCEF on the GE interface. • CSCdr57631 If both access control lists (ACLs) and Multiprotocol Label Switching (MPLS) are configured on a Cisco 12000 series Gigabit Switch Router (GSR) with a 3-Port Gigabit Ethernet line card, traffic may not pass through that interface. There is no workaround.
Caveats • CSCdr77472 When an online insertion and removal (OIR) is performed for a Switch Fabric Card (SFC) or Clock and Scheduler Card (CSC) for a Cisco 12000 series Gigabit Switch Router (GSR), the OLD-CISCO-CHASSIS-MIB and ENTITY-MIB do not reflect this OIR event, and a card that has been removed still appears in both MIBs. There is no workaround.
Caveats • CSCdr90642 On Engine 0 card, the Weighted Random Early Detection (WRED) queue average and drop counter calculations might not be accurate because process timer expiration might vary under the packet-handling load. Under traffic loads that do not respond to drops (for example, User Datagram Protocol (UDP) or load generator), there might be short periods of time where the link bandwidth drops to 0 bps. In this situation, every packet might be dropped. There is no workaround.
Caveats • CSCds10029 Removing a service policy from a large number of Frame Relay permanent virtual circuits (PVCs) might prevent packets from being forwarded out of the entire interface. The commands that lead to this situation are: interface s1/00:0 no frame-relay class name or map-class frame-relay map-class name no service-policy {output} policy-map Workaround: Attach a dummy Class-Based Weighted Fair Queueing (CBWFQ) policy to the interface, and then remove the policy.
Caveats • CSCds16995 On a Cisco 7500/RSP series router, if you deconfigure a link from a bundle while Distributed Multilink PPP (DML-PPP) is running and the link is assigned an IP address, pings through this link will fail. In this situation, the link that has been deconfigured can no longer carry traffic. Workaround: Deconfigure the whole bundle and then reconfigure the bundle without this link. After you perform this action, the link should function properly.
Caveats • CSCdr59243 A Cisco 7500 series router with a PA-CT3 port adapter that has been channelized down to a T1 might exhibit the following error messages on any of the channelized interfaces: %RSP-3-RESTART: cbus complex %RSP-3-RESTART: interface Serial5/0/0:1, output stuck In this condition, the channelized interfaces might enter a down/down state. Workaround: Reload the router.
Caveats • CSCdp34901 Entering the clear ip rtp header-compression EXEC command on a Frame Relay interface that has data-link connection identifiers (DLCIs) with no compression configured might cause the router to reload. Workaround: Do not enter the clear ip rtp header-compression command under these conditions. • CSCdp42210 A node route processor (NRP) ATM interface stops sending when there are multiple particles with data-length 0 at the last particle.
Caveats • CSCdr28435 If you modify an interface maximum transmission unit (MTU), the saved MTU change is not read properly from the NVRAM configuration file upon reload. In a large Frame Relay environment, all Frame Relay links will be in a down state until a manual reconfiguration is done. There is no workaround. • CSCdr29259 Interface counters will give incorrect values for tunnels on a serial interface when Cisco Express Forwarding (CEF) and IP Security (IPSec) are in use. There is no workaround.
Caveats • CSCdr48014 Open Shortest Path First (OSPF) updates might be corrupted on a Cisco 7500 series router using Multiprotocol Label Switching (MPLS) switching with Cisco Express Forwarding (CEF) output features enabled (including "service policy output"). IP routes are temporarily deleted from the IP routing table and a loss of connectivity might occur. Workaround: Configure the ip cef global configuration command. Then, execute the copy running start command, and reload.
Caveats • CSCdr57725 On a Cisco 12000 series Gigabit Switch Router (GSR), the performance card might double-count software-switched input packets. The packet count for hardware-switched packets is not affected. Workaround: Do not configure Gigabit Ethernet static routes to another adjacent Gigabit Ethernet interface. • CSCdr64798 In certain configurations, the ATM permanent virtual connection (PVC) service policy might not function properly after the router has reloaded.
Caveats • CSCdr75209 When Frame Relay fragmentation is configured after attaching a traffic-shaping service policy to a large number of permanent virtual connections (PVCs), the service policy might not function properly. Since Frame Relay fragmentation appears after “service-policy” in the configuration order, there is a chance that this situation will occur after a system reload.
Caveats • CSCdr81857 If a QoS service-policy is configured on a channelized interface on a PA-MC-T/E1 or PA-MC-T/E3 port adapter, entering the microcode reload global configuration command under heavy traffic might result in a failure to forward packets for the interface. Workaround: Remove the service-policy before entering the microcode reload command, and then reapply the policy.
Caveats Resolved Caveats—Cisco IOS Release 12.0(11)S All the caveats listed in this section are resolved in Cisco IOS Release 12.0(11)S. This section describes only severity 1 and 2 caveats. Interfaces and Bridging • CSCdp08975 A Cisco 7200 router that is configured for RFC1577 and is not acting as an Address Resolution Protocol (ARP) server might experience a condition in which the status of ATM VCs might change in spite of the traffic flowing on them.
Caveats • CSCdr35856 If you enter the show ip mds summary EXEC command or the show ip mds forwarding EXEC command at the Versatile Inter face Processor/line card (VIP/LC) console, then a counter to track the number of multicast routes might be incorrectly decremented and underflow to a huge number.
Caveats delay as part of the metric (for example, Enhanced Interior Gateway Routing Protocol (EIGRP)), and might cause the routing protocol to take a route through a single interface over a route through a port channel. Workaround: Manually configure an appropriate delay under the port channel interface by entering the delay tens of microseconds interface configuration command.
Caveats • CSCdp78089 When the environmental values for voltage get corrupted and a Cisco 12008 Gigabit Switch Router (GSR) has all slots at the critical warning level, entering the show run command causes the router to shut down. This condition is more likely to occur after a router has been up and running for several weeks or more. There is no workaround.
Caveats • CSCdr16178 When an access control list (ACL) is applied to an interface and the ACL has destination prefixes in it that are more specific than a route that is learned recursively, packets that match the ACL entry with that destination prefix will not be routed correctly in the “permit” case. For example, if there are the following static routes: ip route 70.0.0.0 255.0.0.0 pos 1/0 ip route 80.0.0.0 255.0.0.0 70.1.1.1 ip route 90.0.0.0 255.0.0.0 80.1.1.
Caveats disables ip route-cache cef by default, and it has changed the forwarding behavior as well. When the command is disabled, packets will not be routed through the GSR if they come in on this interface. Workaround: Upgrading past CSCdr21181 will allow you to configure the ip route-cache cef command, and the command will survive all consecutive reloads if you save it to NVRAM.
Caveats session. The console is inoperative until the old primary GRP has rebooted, at which time the vty connection is reestablished. The effect is similar to an attach session being started. A symptom of this situation is that the prompt has the form “GRP-Slot#”. Workaround: After a failover, type exit to leave the unwanted session with the other GRP. This action should return the console to a normal state. This action will only work if the failed GRP has rebooted to become the secondary GRP.
Caveats • CSCdr44028 If access lists with more than 1000 lines are used on a Cisco router that has compiled access control lists (ACLs) enabled, changes or additions to the ACLs might cause the router to exhibit a message similar to the following: SLOT 0:%SYS-3-CPUHOG: Task ran for 2928 msec (35/5), Process = TurboACL, PC = 4009274C -Traceback= 40092754 401AFED4 401AFB18 401B1474 401B2E60 401B2ED8 401B2FEC 40082128 40082114 In some situations, this condition might cause a failure with process keepalive m
Caveats Resolved Caveats—Cisco IOS Release 12.0(10)S All the caveats listed in this section are resolved in Cisco IOS Release 12.0(10)S. This section describes only severity 1 and 2 caveats. Basic System Services • CSCdp45379 A Cisco 7200 series router with an NPE-300 network processing engine installed might not boot up when certain Cisco IOS Release 12.0(5)XE3 subset images are installed. The router will pause indefinitely in the early stage of booting up, and a power cycle is required to resume.
Caveats IP Routing Protocols • CSCdp18787 A Cisco router that has tag switching enabled and is running Cisco IOS Release 12.0(5)T might reload if a tag advertisement appears in a certain time window when a related routing update takes place. An ATM interface transition might cause this condition. There is no workaround.
Caveats • CSCdp34046 If an output rate limit is configured on a non-Versatile Interface Processor (VIP) interface (for example, AIP or FIP) on a Cisco 7500 series Route Switch Processor (RSP) with Cisco Express Forwarding (CEF) enabled, packets cannot be switched out of that interface. Workaround: Disable CEF.
Caveats • CSCdp74038 On Gigabit Ethernet line cards, 802.1Q packets that are 512 bytes and larger might get dropped on input. There is no workaround. • CSCdp74616 On the Cisco OC-48c/STM-16c and Cisco QOC-12 line cards for the Cisco 12000 series Gigabit Switch Router (GSR), there is a timing problem during initialization that might cause the line cards to reload if Multiprotocol Label Switching (MPLS) packets are received before the initialization is complete. There is no workaround.
Caveats • CSCdp86111 When Cisco Express Forwarding (CEF) is configured as part of a large configuration (typically with access lists), following boot traffic that is directly addressed to the interfaces of a router might not be received. This condition can be observed on enabled interfaces where IP interfaces appear to be up, but the CEF interfaces are down. Workaround: Perform one of the following steps. – Boot without CEF enabled. – Disable and then re-enable CEF.
Caveats Resolved Caveats—Cisco IOS Release 12.0(9)S All the caveats listed in this section are resolved in Cisco IOS Release 12.0(9)S. This section describes only severity 1 and 2 caveats. Basic System Services • CSCdm81049 If a serial interface is flapping up and down repeatedly, the router might pause indefinitely with a stack trace indicating that it is in usecdelay() as a result of cbus_mci_serial_reset() being called while at interrupt level. This situation rarely occurs.
Caveats Interfaces and Bridging • CSCdm19573 A Cisco 7200 series router that is running Cisco IOS Release 11.1(22)CC or Cisco IOS Release 11.
Caveats peers are route-refresh capable, soft-reconfiguration inbound is not configured, the filter that you apply does not result in a deny for a prefix, if you do a hard reset, or the soft reconfiguration is done through route-refresh. Workaround: If you have soft cleared the session after applying the filter, enter the clear ip bgp {*} [soft out] EXEC command. Alternate workaround: Upgrade to Cisco IOS Release 12.0(8.5)S.
Caveats • CSCdp46780 After the primary clock scheduler card (CSC) has been removed, a Cisco OC-48/STM-16 Packet-over-SONET/SDH line card might not recover from being switched to the secondary CSC card and report error messages. Workaround: Reload the line card. • CSCdp47676 Under certain timing conditions on some Versatile Interface Processors (VIPs), 2-port High-Speed Serial Interfaces (HSSIs) or PA-2T3s might experience abnormal transmit underruns as indicated by the show interfaces EXEC command.
Caveats Resolved Caveats—Cisco IOS Release 12.0(8)S All the caveats listed in this section are resolved in Cisco IOS Release 12.0(8)S. This section describes only severity 1 and 2 caveats. IP Routing Protocols • CSCdp15126 If you enable policy routing on a Fast Ethernet Inter-Switch Link subinterface, the packet that is destined for the next hop is not policy routed. Instead, the packet is sent along the default route. There is no workaround.
Caveats • CSCdp21343 Some permanent virtual connections (PVCs) in ATM line cards do not function. The show atm vc command indicates that the ATM PVC peak and average rates are zero. The state of any sub-interfaces remain INACTIVE. During a reload when the shut ATM sub-interface is encountered, all subsequent sub-interfaces within that interface will be ignored. Workaround: Ensure that the ATM interface is not shut. Enter the shut and no shut commands on each affected ATM sub-interface.
Caveats Miscellaneous • CSCdm70554 A Gigabit EtherChannel (GigE) line card might pause indefinitely in FABL START state when the secondary Gigabit Route Processor (GSR) is in the chassis. Workaround: Remove the secondary Gigabit Route Processor (GSR). • CSCdm72149 When formatting a PCMCIA card with Cisco IOS Release 12.0 S, the command might fail if you have not formatted your bootflash. Workaround: Format your bootflash and try the operation again.
Caveats Resolved Caveats—Cisco IOS Release 12.0(6)S This section describes possibly unexpected behavior by Cisco IOS Release 12.0(6)S. This section describes only severity 1 and 2 caveats. IP Routing Protocols • CSCdk70273 If there are more than 31 OSPF interfaces, flooding does not work, starting from the 32nd OSPF interface. There is no workaround. • CSCdm34431 An RSP4 Route/Switch Processor that is running Cisco IOS Release 12.0(3.6)T or 12.
Caveats Miscellaneous • CSCdm09656 After you load the image on a Cisco 7500 series router that is running Cisco IOS Release 12.0 S and Release 12.0 T, issuing the no shutdown command on a T1 controller that is up causes the T1 controller to go down. Channels created under that controller also go down. This only happens with T1 and does not occur on Cisco 7200 series routers. Workaround: Issue the shutdown command followed by the no shutdown command on the T1 controller.
Related Documentation Related Documentation The following sections describe the documentation available for the Cisco 7000 family and Cisco 12000 series routers. These documents consist of hardware and software installation guides, Cisco IOS configuration and command reference publications, system error messages, feature modules, and other documents.
Related Documentation Platform-Specific Documents These documents are available for the Cisco 7000 family and Cisco 12000 series routers on CCO and the Documentation CD-ROM: • Installation and Configuration Guides and Configuration Notes • User Guides • Hardware Installation and Maintenance Guides • Regulatory Compliance and Safety Documentation On CCO at: Technical Documents: Documentation Home Page: Core/High-End Routers On the Documentation CD-ROM at: Cisco Product Documentation: Core/High-End R
Related Documentation You can reach these documents on CCO at: Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Configuration Guides and Command References You can reach these documents on the Documentation CD-ROM at: Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Configuration Guides and Command References Release 12.0 Documentation Set Table 8 describes the contents of the Cisco IOS Release 12.
Related Documentation Table 8 Cisco IOS Software Release 12.
Related Documentation Table 8 Cisco IOS Software Release 12.
Obtaining Documentation Obtaining Documentation World Wide Web You can access the most current Cisco documentation on the World Wide Web at http://www.cisco.com. Translated documentation can be accessed at http://www.cisco.com/public/countries_languages.shtml. Documentation CD-ROM Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM is updated monthly. Therefore, it is probably more current than printed documentation.
Obtaining Technical Assistance You can access CCO in the following ways: • WWW: www.cisco.com • Telnet: cco.cisco.com • Modem using standard connection rates and the following terminal settings: VT100 emulation; 8 data bits; no parity; and 1 stop bit. – From North America, call 408 526-8070 – From Europe, call 33 1 64 46 40 82 You can e-mail questions about using CCO to cco-team@cisco.com.
Obtaining Technical Assistance Documentation Feedback If you are reading Cisco product documentation on the World Wide Web, you can submit technical comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco. You can e-mail your comments to bug-doc@cisco.com. To submit your comments by mail, for your convenience many documents contain a response card behind the front cover.
