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Catalyst 6000 Family Software Configuration Guide—Releases 6.3 and 6.4
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Chapter 36 Configuring SNMP
Understanding How SNMPv1 and SNMPv2c Works
SNMP ifindex Persistence Feature
The SNMP ifIndex persistence feature is always enabled. With the ifIndex persistence feature, the
ifIndex value of the port and VLAN is always retained and used after the following occurrences:
•
Switch reboot
•
High-availability switchover
•
Software upgrade
•
Module reset
•
Module removal and insertion of the same type of module
For Fast EtherChannel and Gigabit EtherChannel interfaces, the ifIndex value is only retained and used
after a high-availability switchover.
Understanding How SNMPv1 and SNMPv2c Works
The components of SNMPv1 and SNMPv2c network management fall into three categories:
•
Managed devices (such as a switch)
•
SNMP agents and MIBs, including Remote Monitoring (RMON) MIBs, which run on managed
devices
•
SNMP network management applications, such as CiscoWorks2000, which communicate with
agents to get statistics and alerts from the managed devices. See the
“Using CiscoWorks2000”
section on page 36-6
for more information on CiscoWorks2000.
Note
An SNMP management application, together with the computer it runs on, is called a
Network ManagementSystem (NMS).
Using Managed Devices
Catalyst 6000 family switches are managed devices that support SNMP network management with the
following features:
•
SNMP traps (see the
“Configuring SNMPv1 and SNMPv2c from the CLI” section on page 36-10
)
•
RMON in the supervisor engine module software (see
Chapter 37, “Configuring RMON”
)
•
RMON and RMON2 on an external SwitchProbe device
Using SNMP Agents and MIBs
SNMP network management uses these SNMP agent functions:
•
Accessing a MIB variable—This function is initiated by the SNMP agent in response to a request
from the NMS. The agent retrieves the value of the requested MIB variable and responds to the NMS
with that value.
