topic Re: Cisco ISE : 5441 Endpoint Started a New Session in Network Access Control

Cisco ISE : 5441 Endpoint Started a New Session

KaigeG — Tue, 26 Apr 2022 00:42:14 GMT

We have a ISE deployment (2.7p1) that has been generating thousands of 5441 errors a week for endpoints across our network. They range from happening minutes to milliseconds apart from each other and appear to have no correlation to each other location wise (each instance happening on different Network Devices when they occur.

A full error reads as:

Endpoint Id: XX::XX Username:
Radius Username: Network Device Name:
Access Type: Location:
NAS IP:

5441 Endpoint started new session while the packet of previous session is being processed. Dropping new session.

Endpoint started new session while the packet of previous session is being processedVerify known NAD or supplicant issues and published bugs. Verify NAD and supplicant configuration.

Are there any applicable known bugs or remedies to this issue?

Thank you.

Re: Cisco ISE : 5441 Endpoint Started a New Session

Marcelo Morais — Tue, 26 Apr 2022 01:58:16 GMT

Hi @KaigeG ,

please take a look at BRKSEC-3383 Troubleshooting ISE, special attention to pg. 10 802.1x Endpoint Abandoned EAP Session.

Hope this helps !!!

Re: Cisco ISE : 5441 Endpoint Started a New Session

KaigeG — Tue, 26 Apr 2022 02:01:55 GMT

Thanks so much for the reply. A lot of helpful info in the slides. Appreciate it!

Re: Cisco ISE : 5441 Endpoint Started a New Session

vrdfarzan — Mon, 18 Dec 2023 10:48:42 GMT

topic Re: Cisco ISE : 5441 Endpoint Started a New Session in Network Access Control

Cisco ISE : 5441 Endpoint Started a New Session

Re: Cisco ISE : 5441 Endpoint Started a New Session

Re: Cisco ISE : 5441 Endpoint Started a New Session

Re: Cisco ISE : 5441 Endpoint Started a New Session

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