topic Re: Cisco ACS 12852 Invalid buffer received. in Network Access Control

Cisco ACS 12852 Invalid buffer received.

bgp.ripe901 — Fri, 05 Feb 2021 19:13:12 GMT

Dear community,

I am using cisco ACS 5.81.4 with WLC 5508 (ver 8.5) to connect users to a wireless network with PEAP (MSCHAPv2). My customers use mobile terminals and i see such errors in ACS logs:

Failure Reason: 12852 Invalid buffer received. Crypto processing failed

Acs received invalid encrypted buffer from client. Cryptographic processing of this buffer failed.

Verify that the supplicant of the client does not have any known compatibility issued and that it is properly configured.
Contact TAC.

why can this happen?

Re: Cisco ACS 12852 Invalid buffer received.

balaji.bandi — Fri, 05 Feb 2021 19:18:12 GMT

is this working failed or never worked.

have look at this blog :

https://mrncciew.com/2013/03/03/peap-eap-fast-with-acs-5-2/

Re: Cisco ACS 12852 Invalid buffer received.

bgp.ripe901 — Fri, 05 Feb 2021 19:36:32 GMT

But after a while everything starts working fine for clients !

My config ACS in attach.