topic Re: Cisco WLC 9800 SSO / CDP Information in Wireless

Cisco WLC 9800 SSO / CDP Information

maria-eleni — Thu, 16 Feb 2023 17:53:13 GMT

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?

Re: Cisco WLC 9800 SSO / CDP Information

balaji.bandi — Thu, 16 Feb 2023 20:07:44 GMT

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

Re: Cisco WLC 9800 SSO / CDP Information

maria-eleni — Thu, 16 Feb 2023 20:20:18 GMT

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?

Re: Cisco WLC 9800 SSO / CDP Information

balaji.bandi — Thu, 16 Feb 2023 20:39:09 GMT

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

Re: Cisco WLC 9800 SSO / CDP Information

Rich R — Fri, 17 Feb 2023 15:31:33 GMT

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.