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External RADIUS proxy servers failover behaviour

dvan
Cisco Employee
Cisco Employee

Hi,

When setting up external RADIUS proxy servers for use in ISE via RADIUS server sequence, if there are multiple external servers defined in the sequence, how does failover work amongst these?  Does each RADIUS request cycle through the servers defined in the sequence according to the set timeouts, or is health information kept for each external RADIUS server saving the need for every request to try known 'dead' servers in the sequence?

Thanks,

Denis

1 Accepted Solution

Accepted Solutions

hslai
Cisco Employee
Cisco Employee

CSCup45594    ISE 1.2 External RADIUS Is Not Persistent After Failover

is planned for next ISE release. FYI.

View solution in original post

6 Replies 6

hslai
Cisco Employee
Cisco Employee

AFAIK it always go by the server list. Let me confirm it with our teams.

dvan
Cisco Employee
Cisco Employee

Ok thanks

hslai
Cisco Employee
Cisco Employee

CSCup45594    ISE 1.2 External RADIUS Is Not Persistent After Failover

is planned for next ISE release. FYI.

dvan
Cisco Employee
Cisco Employee

Thanks!

dliu_amanda
Level 1
Level 1

what's the exact behavior if first Radius server not available? on ISE 2.1.

The bug fix is not yet available in ISE 2.1 so ISE would try all servers in sequence.