After a Compact Flash upgrade on a Catalyst 6509 the SNMP interface indexes changed. Which global configuration preserves interface index values?
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Correct answer: snmp-server ifindex persist.
Why this is the answer
The command snmp-server ifindex persist ensures that SNMP interface index (ifIndex) values remain consistent across reboots, hardware changes, or IOS upgrades. This is crucial for network monitoring systems that rely on these indexes to identify interfaces. Without this command, ifIndex values can change, leading to incorrect data association in monitoring tools. The other options are syntactically incorrect or do not exist as valid Cisco IOS commands for this purpose. snmp-server ifindex permanent is not a valid command. snmp ifindex persist and snmp ifindex permanent are missing the server keyword, making them invalid.
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