Datasheet

116
Release Notes for Cisco IOS Release 12.1E on the Catalyst 6500 and Cisco 7600 Supervisor Engine and MSFC
OL-2310-11
Limitations and Restrictions
configuration commands can be applied to EtherChannel interfaces. Other QoS queueing
configuration commands can be applied, however, to individual EtherChannel physical interfaces.
After the physical interfaces are bundled into an EtherChannel, QoS classification, marking, and
policing by the Policy Feature Card (PFC) for the channel packets is determined by the
service-policy attached to the EtherChannel interface. The service policies attached to the individual
physical interfaces of the EtherChannel do not matter. The same is true for the port-based and
VLAN-based QoS state of the EtherChannel interface. You can disable the PFC QoS features using
the no mls qos interface configuration command on the EtherChannel interface.
• Cisco IOS running on the supervisor engine and the MSFC does not support the IEEE bridging
protocol for bridge groups. You should configure bridge groups to use VLAN-bridge or DEC
protocol spanning tree.
• The maximum recommended number of Layer 3 multicast entries is 10,000. The maximum
recommended number of multicast entries supported in the Layer 2 forwarding table is 12,000.
• After enabling Protocol Independent Multicast (PIM) on an interface, you need to enter the ip
mroute-cache command on the interface to enable multicast fast-switching. If you have “no ip
mroute-cache” configured, multicast packets that are not hardware switched will go to the process
level that increases the load on the router.
• The show ibc command misleadingly displays Inter-Switch Link (ISL) trunk status as “disabled”
and the GBIC as “missing,” because the IBC in a Catalyst 6500 series switch or Cisco 7600 series
router is the internal electrical interface between the switch processor and the route processor. Trunk
and media types are not given for this type of interface. (CSCdp21121, CSCdp21380)
• With Supervisor Engine 1 and PFC, when you upgrade from Release 12.1(2)E to 12.1(3a)E2, it is
safe to ignore “ip cef incomplete command” error messages. (CSCds43045)
• The show access-list command displays statistics only for traffic that matches ACLs processed in
software on the MSFC. The show access-list command does not display statistics for traffic that
matches an ACL supported in hardware on the PFC. (CSCdt14386)
• The show interface stats command does not display statistics for traffic that is Layer 3 switched by
the PFC. The show interface command displays statistics (labelled L2 and L3) for traffic that is
Layer 3 switched by the PFC2. (CSCds41388)
• To avoid subjecting routing protocol packets to policy-based routing, configure filtering in route
maps so that it does not match routing protocol packets. (CSCds44369)
• Microflow policing does not support policing of identical flows arriving on different interfaces
simultaneously. Attempts to do so lead to incorrectly policed flows. (CSCdt72147)
• Because the system does not boot from MSFC bootflash, if the NVRAM configuration is not valid
(or not present), the service config option defaults to “on,” and the service config feature is enabled
after the erase startup-config command is issued. (CSCdp12598)
• In a VTP version 1 domain with some switches running Catalyst software and some switches
running Cisco IOS software on both the supervisor engine and the MSFC, if the VLANs were
created on a switch running Catalyst software and then propagated through VTP to switches running
Cisco IOS software, if you enter commands on the switches running Cisco IOS software to
configure VTP version 2, you might receive messages about invalid VLAN configuration.
Workaround: Perform VLAN configuration on a switch running Catalyst software or enter VLAN
configuration commands to correct all VLAN configuration errors reported in the messages.
(CSCdp47622)
• When you upgrade to a later software release, WS-X6816-GBIC switching modules might reset
more than once when the new release boots for the first time. (CSCdw87069)