refine for cisco device logging

Dear Netpro community,

I'm trying to tweak the AAA portion on the cisco device

Here is my current setup:

AAA new-model

AAA authentication login default local radius group

AAA authentication enable default group enable RADIUS

If the radius server is offline, the first level is not a problem. However, the problem occurs if I want to go to activate the mode. It will not use the enable password set locally, but instead he will go to and search radius for authentication server.

Debug:

test_switch > en

Password:

01:05:15: RADIUS: authentication using the $enab15$

01:05:15: RADIUS: ustruct sharecount = 1

01:05:15: RADIUS: pass on tty0 id 44 x.x.x.x:1812 initial, request for access,

Len 72

01:05:15: 4-6 AC10E10F attribute

01:05:15: 5 6 00000000 attribute

01:05:15: 61 6 00000000 attribute

01:05:15: assign 1 to 10 24656E61

01:05:15: assign 2 18 69ABFDF8

01:05:15: 00000006 6 6 attribute

01:05:20: RADIUS: retransmission id 44

01:05:25: RADIUS: retransmission id 44

01:05:30: RADIUS: retransmission id 44

Password:

01:05:35: RADIUS: marking x.x.x.x:1812, 1813-dead server

01:05:35: RADIUS: tried all servers.

01:05:35: RADIUS: no valid server found. Try any viable Server

01:05:35: RADIUS: tried all servers.

01:05:35: RADIUS: no response for id 44

01:05:35: RADIUS: no response from Server

Password %: timeout expired.

% Authentication failure.

How can I make sure that I can access the switch privilege mode if there is no path to the radius server?

It took 20 seconds of the original program:

01:05:15: RADIUS: pass on tty0 id 44 x.x.x.x:1812 initial, request for access,

Len 72

... with three broadcasts, until the server has been marked dead:

01:05:35: RADIUS: marking x.x.x.x:1812, 1813-dead server

Maybe you should mark a server RADIUS MIA as death more quickly, by setting a timeout of the RADIUS server (for example: 1 sec.).

for example:

RADIUS-server host aaa.bbb.ccc.ddd auth-port 1812 acct-port 1813 timeout 1 key xxxxxxxxxx

If the server is recognized as dead earlier (4S, broadcasts incl. 3) maybe it's possible to use the locally configured enable password before the "time-out of password occurs".

I do not say for sure that this will solve your problem, but I know I want to try it to find out.

Tags: Cisco Security

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