Cisco WLC 9800 SSO / CDP Information

[maria-eleni]

Hello fellows!

In an SSO  configuration (RP), is it normal to not see cdp info about the standby controller at the core switch in which both controllers are connected? 

[balaji.bandi · Accepted solution]

yes, i guess since they use the same name. (never tried but will do some testing next week)

[maria-eleni]

Hello,

Thanks for your helpful reply.

Let me ask you one last thing, if one link goes down (active wlc), switchover will be triggered automatically?

[balaji.bandi]

Which Link ? 

check the below document :

https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/213915-configure-catalyst-9800-wireless-control.html

https://www.cisco.com/c/dam/en/us/td/docs/wireless/controller/9800/17-1/deployment-guide/c9800-ha-sso-deployment-guide-rel-17-1.pdf

[Rich R]

At the moment only the active chassis seems to send CDP.

Note there was an enhancement in 17.9 for LLDP to be active on *both* chassis:
https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/17-9/config-guide/b_wl_17_9_cg/m_vewlc_high_availability.html#Cisco_Concept.dita_1b250d01-6dbe-4334-b85e-7571f4d4056c
Cisco IOS XE Cupertino 17.9.1 
Link Layer Discovery Protocol (LLDP) Support in the Standby Controller
From this release, the Link Layer Discovery Protocol (LLDP) process will be up and running in both active and standby controllers.