I want to implement eigrp md5 authentication between one Cisco 3750 Catalyst Switch and an other Cisco 3560 Catalyst.
Routing is defined correctly with the autonomous system 10. Key Chains are created on the two switches.
I have implemented these commands on the relative interfaces :
ip authentication key-chain eigrp 10 EIGRP_KEYS
ip authentication mode eigrp 10 md5
When I issue debug ip packets , I can see that the md5 authentication don't take effect.
What I discovered, that all is ok on the 3750 switch, but on the 3560 switch, the command ip authentication key-chain eigrp 10 EIGRP_KEYS is delteled from the interface config.
Even I tried to enter this config again, but at any time, this config is systematicly deleted, causing the md5 eigp authentication to fail.
I rebooted the switch, but without any result, the problem is the same.
I am using the c3560-advipservicesk9-mz.122-44.SE1.bin IOS image on the Catalyst 3560. It there a known bug about this ?
If not, how can I fix this ?
Hi ganeshh.iyer ,
Thank you for your reply.
The link you provided is the same I used to implement my cnfig.
Concerning eigrp plain text authentication, I think that it's not supported.
You are right, plain text authentication is not supported in EIGRP.
This sounds like the bug you are facing -
|CSCsm26406 Bug Details||Bug #39 of 63 | < Previous | Next >|
|WI08: EIGRP authentication not working|
The switch does not take the "ip authentication key-chain eigrp"
command. When this command is issued there is no error message
given so it appears that it is accepted. However when doing a show
run under the interface, the command is not there. Issuing this command
also removes the "ip authentication mode eigrp" command. The result is
that eigrp authentication does not work.
This problem was observed on 3750-ME and 3750E running 12.2(44)SE.
There is no workaround.
| Status |
3 - moderate
In Last Year
Cisco IOS software
Known Affected Versions
There is no workaround other than to upgrade.
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