User guide

Release Notes for Cisco 2500 Series for Cisco IOS Release 12.0 T 21
New Software Features in Release 12.0(3)T
Process MIB
The addition of the CISCO-PROCESS-MIB and changes to the CISCO-MEMORY-POOL-MIB
allow the retrieval of additional CPU and memory statistics and their reporting by SNMP. The
CISCO-PROCESS-MIB provides CPU 5-second, 1-minute, and 5-minute statistics. In addition, this
MIB provides CPU utilization and memory allocation/deallocation statistics for each process on
each CPU listed in the CISCO-PROCESS-MIB.
The CISCO-PROCESS-MIB is enabled when the first SNMP command is configured. The
background statistics collection for VIP cards and the master CPU occurs even if the SNMP
subsystem is not initialized.
Redundant Dial Shelf Controller
The Cisco AS5800 dial shelf can contain two Dial Shelf Controller (DSC) cards. The DSC card
provides the following:
• Master clock for the dial shelf
• Fast Ethernet link to the router shelf
• Environmental monitoring of the feature boards
• Bootstrap images on start-up for the feature boards
With two DSC cards present, DSC redundancy provides for one DSC to act as a backup to the active
one. If the active DSC fails, the backup provides the functionality. The primary aim is to increase
system availability by preventing loss of service in the event of the failure of one of the DSCs.
This feature is automatically enabled when two DSC cards are installed. No configuration
commands are required. (It is assumed that where the external DSC clocking port is configured, the
clock signal fed into both DSCs is identical.) Console executive commands provided with this
feature facilitate the use of the feature.
Response Time Reporter Enhancements
The Response Time Reporter (RTR) feature allows you to monitor network performance, network
resources, and applications by measuring response times and availability. RTR statistics can be used
to perform troubleshooting, problem notifications and pre-problem analysis. The RTR
enhancements extend IP support, such as Type of Service, and allow you to measure various types
of IP traffic, such as UDP, TCP, and HTTP.
RFC 1483 for Token Ring Networks
Cisco IOS Release 12.0(3)T supports RFC 1483 and enables the transfer of network interconnect
traffic over ATM AAL5 layer, using LLC encapsulation. RFC 1483 defines an encapsulation type
for transferring LAN data via ATM networks.
All LAN protocols that use the LLC format and run on Ethernet, Token Ring, or ATM networks are
encapsulated in LLC data packets transported via ATM networks.
RSVP to ATM QoS Internetworking
The RSVP-ATM QoS networking feature provides support for Controlled Load Services using
RSVP over an ATM core network. This feature requires the ability to signal for SVCs across the
ATM cloud in response to RSVP reservation messages. To meet this requirement, RSVP over ATM
supports mapping of RSVP sessions to ATM nonbroadcast multiaccess (NBMA) switched virtual
circuits (SVCs).