We want SNMP support for Cisco C9800 WLC in a HA setup.
Details of user story
Cisco C9800 WLC in HA setup uses the last digit in OID to identify a specific WLC. This means that when we do a failover PRTG will give an error on the sensor because the OID is changed. (see example below).
Querry towards the primary WLC, it responds with .3 in the end:
[email protected] ~ % snmpwalk -v2c -c private 10.48.39.133 188.8.131.52.184.108.40.206.220.127.116.11.1.4 SNMPv2-SMI::enterprises.18.104.22.168.22.214.171.124.3 = Gauge32: 7
Perform a failover:
vaperovi ~ % ssh [email protected] WLC11#redundancy force-switchover System configuration has been modified. Save? [yes/no]: yes Building configuration... [OK]Proceed with switchover to standby RP? [confirm]
Query towards the secondary WLC which is currently active. It responds with .2 in the end.
vaperovi ~ % snmpwalk -v2c -c private 10.48.39.133 126.96.36.199.188.8.131.52.184.108.40.206.1.4 SNMPv2-SMI::enterprises.220.127.116.11.18.104.22.168.2 = Gauge32: 10
This behavior is normal and expected. These numbers are going to be random and probably different between any 2 WLCs you have in your network, even if they are in HA.
PRTG should not be querying 22.214.171.124.126.96.36.199.188.8.131.52.1.4.5 or 184.108.40.206.220.127.116.11.18.104.22.168.1.4.6 or whatever number comes after the last 4. You should be querying specifically 22.214.171.124.126.96.36.199.188.8.131.52.1.4, and WLC is supposed to answer with whatever number comes afterwards.
It is possible that this will affect other Cisco products as well. Including C9600 switches.
- Support for Cisco WLC C9800 HA