Unanswered Question
Aug 3rd, 2010

Dear Netpros,

For NMS applications we are using “using port index” to monitor interface/bandwidth of Cisco equipments. But the drawback of using this feature is this feature tendency to change after equipment reboot. Post which for NMS enabling we have to change PORT INDEX manually.

To avoid such condition, we have a get solution “snmp-server ifindex persist” command on cisco devices.  (To be configure under USERmode or Interface Mode ..?  please sugegst)

As we are not much familiar with the effectiveness of this command. We want to understand the working ,function and requirement of this command or feature…or can simply say looking for “How this command will solve our purpose of changing PORT INDEX number after device reboot.”


I have this problem too.
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yjdabear Wed, 08/04/2010 - 22:23

Does the following excerpt answer your question(s)?


"Command History



This command was introduced.


This command was integrated into the 12.1 T release train.

Usage Guidelines

Interface Index Persistence means that ifIndex values in the IF-MIB  persist across reboots, allowing for consistent indentification of  specific interfaces using SNMP.

The snmp ifindex persistence interface configuration command  enables and disables ifIndex persistence for individual entries  (corresponding to individual interfaces) in the ifIndex table of the  IF-MIB.

The snmp-server ifindex persistence global configuration command enables  and disables ifIndex persistence for all interfaces on the routing  device (this applies only to interfaces that have ifDescr and ifIndex  entries in the ifIndex table of the IF-MIB).

IfIndex commands configured for an interface apply to all subinterfaces  on that interface."


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