How to count concurrent session on Cisco ISE

[jewfcb001]

Hi All ,

I see the document about concurrent session but I'm confuse about this If I have Base License 2500 License I think can handle 2500 User and 2500 concurrent session or not . 

[balaji.bandi]

if you 2500 it will handle as expected ( even unofficially it does more,) you only see compliance issue.

[jewfcb001]

@balaji.bandi 

Hi Balaji 

You mean We can handle session more than purchase license or not (unofficially) But the true way must purchase base license depend on the real users . Can you explain count concurrent session ? In this I use SSL VPN for authentication . I think if in this case message radius authentication success it's count session to 1 session or not . and can we detect threshold  of reach maximum license ? 

Thank you for advise.

[balaji.bandi]

as per my comment related to device administration.

as per the VPN, you need to have based on the user count.

Can you explain count concurrent session ? 

https://community.cisco.com/t5/security-blogs/how-to-see-concurrent-session-on-cisco-ise/ba-p/4144937

[jewfcb001]

@balaji.bandi 

Hi Balaji 

Thank you for information . I have a small question If the customer reach maximum license what happen after the license max limit ? 

[balaji.bandi]

VPN any client may have have issue, but device admin works as expected.

[Mohammed al Baqari]

Hi,

They will report out-of-compliance messages in ISE but still new sessions
will be accepted. You need to contact your account manager to get
additional information if this message is consistent.


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[jewfcb001]

@Mohammed al Baqari 

Thank you for information . 

[thomas · Accepted solution]

A session in ISE is based on RADIUS Accounting Start & Stop status messages from the network access device as defined in RFC2866. A session would be created per unique endpoint actively authorized on the network by ISE. A single user may have more than one active endpoint (laptop, phone, tablet, etc.) or none at all (IP Phone in a lobby).

You may see concurrent / active sessions in ISE under Operations > RADIUS > Live Sessions . 

And since you appear to be concerned with Licensing you may see your License consumption based on active sessions in the Licensing screen Administration > System > Licensing.