If you have a Cisco device with an extremely long interface description, NMS platforms and tools (like snmpget and snmpwalk) only shows the first 64 bytes of the ifAlias field.
To lift this limitation, use this command :
snmp ifmib ifalias long
The limit is then rised to the MIB maximum for DisplayString (255 bytes). The command is supported from IOS 12.2(2)T / 12.2(28)SB.
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