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ISE 3.2 EAP-TLS with Microsoft Azure AD - User Cert & EAP MTU Concerns

pritamCTC
Level 1
Level 1

Dear @Greg Gibbs 

https://www.cisco.com/c/en/us/support/docs/security/identity-services-engine/218197-configure-ise-3-2-eap-tls-with-azure-act.html

When we are following the above deployment "ISE 3.2 EAP-TLS with Microsoft Azure AD" only with user certificate, should we worry about below concerns about large EAP packet (Wireless) highlighted with "usually Client Certificate"?

https://www.cisco.com/c/en/us/support/docs/lan-switching/8021x/220576-eap-fragmentation-implementations-and-be.html 

Microsoft Windows Native Supplicant

Microsoft Windows sends EAP-TLS fragments (usually Client Certificate) that are 1,486 or 1,482 bytes long. For this value size, the Ethernet frame is 1,500 bytes.

 

Truly appreciate for your response.

 

1 Reply 1

Greg Gibbs
Cisco Employee
Cisco Employee

If the ISE PSNs are deployed in Azure, then the out-of-sequence UDP issues caused by the certificate payload will be an issue. If the PSNs are deployed in any other location (on-prem, AWS, etc) it will not be an issue.