Specifications

17
Release Notes for Cisco IOS Release 12.0 S
78-7130-11 Rev. B0
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. By allowing notifications based on events, the Network
Management Server (NMS) does not need to constantly poll managed devices to find out if something
has changed.
Support of the Event MIB has been added to Cisco IOS software to work with network management
systems and, when combined with the currently integrated Expression MIB support, provides a flexible
and efficient way to monitor complex conditions on network devices.
By allowing SNMP notifications to take place only when a specified condition occurs, Event MIB
support reduces the load on affected devices, significantly improving the scalability of network
management solutions. See the following document for further information:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121newft/121t/121t3/dtevent.htm
Frame Relay Switching Diagnostics and Troubleshooting
Platforms: Cisco 12000 series
The Frame Relay Switching Diagnostics and Troubleshooting feature enhances Frame Relay switching
functionality by providing tools to diagnose problems in switched Frame Relay networks. The show
frame-relay pvc command has been enhanced to display detailed reasons why packets were dropped from
switched permanent virtual circuits (PVCs). The command also displays the local PVC status, the
Network-to-Network Interface (NNI) PVC status, and the overall PVC status. If a network problem is
observed, the new debug frame-relay switching command can be used to display the status of packets on
switched PVCs at regular intervals. This new debug command displays information such as the number of
packets that were switched, why packets were dropped, and changes in status of physical links and PVCs.
See the following document for further information:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s12/12
sfrsdg.htm
Hot Standby Router Protocol MIB
Platforms: Cisco 7200 series, Cisco 7500/RSP series, Cisco 12000 series
Cisco IOS Release 12.0(12)S adds support for the Hot Standby Router Protocol (HSRP) MIB for the
Cisco 7100 series, 7500 series and 12000 series GSR platforms.
HSRP is a Cisco proprietary protocol defined in RFC# 2281. The HSRP MIB allows network
management systems (NMS) to get reports about the “active” or “standby” HSRP status of devices in a
network using Simple Network Management Protocol (SNMP) operations. HSRP trap notifications are
configured from the Cisco IOS command-line interface (CLI) using the snmp-server enable traps
command and the snmp server host command. A trap notifies the NMS when a router leaves or enters
the active or standby state. When an entry is configured from the CLI, the Row Status for that group in
the MIB immediately goes to the active state. See the following document for further information:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s12/12
s_hsrp.htm