topic AAA Server Liveness Check in Network Access Control

AAA Server Liveness Check

R Kirch — Mon, 10 Mar 2025 08:54:59 GMT

On my switch, I have multiple aaa servers configured. I can see this with the `show aaa servers` command. However, one of the servers is reporting as DEAD. This server is in fact up and pingable.

Does anybody happen to know what methods a switch uses for liveness check to aaa servers? I want to make sure this traffic is being allowed, but can't find any documentation on the process.

Thanks for any help.

Re: AAA Server Liveness Check

Mark Elsen — Mon, 10 Mar 2025 10:24:38 GMT

- Have a look at https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9200/software/release/17-2/configuration_guide/sec/b_172_sec_9200_cg/configuring_aaa_dead-server_detection.html
It's kind of the reverse , but helps in case the radius server did not respond for a short time (e.g.)

Re: AAA Server Liveness Check

R Kirch — Mon, 10 Mar 2025 11:00:37 GMT

Found the answer in that article. Thanks!