topic Re: 9800 datapath exhaustion in Wireless

9800 datapath exhaustion

MrSlow — Tue, 06 Jan 2026 14:26:02 GMT

Has anyone else expeienced issues with a 9800-40 and 9115 AP's experiencing datapath exhasution?

We seem to be getting it a lot, symptoms are clients being unable to connect to a specific AP, logs contain the following

[client-orch-db] [18190]: (info): MAC: 56d7.2892.9bae Data path plumb failed on standby, Adding client to poison list

and the end result is a client passing authentication, but once passed is then dropped by the AP and the cycle continues.

The 9800-40 is on 17.15.04b but this has been occuring on 17.12.6 as well so I don't think it's the train of code causing the issue. the AP isn't heavily utilised, between 10-15 clients generally with the vast majority on 5ghz SSID's

This only really seems to be an issue with Anchored/mobility SSID as well.

Flex connnect is not in use

rebooting the AccessPoint resolves the issue for a period of time (20-50 days) before reoccuring.

Re: 9800 datapath exhaustion

Mark Elsen — Tue, 06 Jan 2026 14:31:04 GMT

- @MrSlow FYI : https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwo53638
Use one of the Known Fixed Releases

Re: 9800 datapath exhaustion

MrSlow — Tue, 06 Jan 2026 15:20:19 GMT

Hi Mark,

I checked that link 17.15.04b is listed as a Known Fixed Release...

Re: 9800 datapath exhaustion

Mark Elsen — Tue, 06 Jan 2026 15:25:12 GMT

- @MrSlow I have seen it , therefore I would suggest to go for 17.18.2

Re: 9800 datapath exhaustion

MrSlow — Tue, 06 Jan 2026 15:27:03 GMT

Thanks Mark, when you say you have seen it? you mean you've seen this issue before on 17.15.4b?

Re: 9800 datapath exhaustion

Mark Elsen — Tue, 06 Jan 2026 15:36:38 GMT

- @MrSlow No experiences with the particular problem myself, I was only referring to 17.15.4b being mentioned
in Known Fixed Releases ,