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Nexus 7710 authentication failures

Hello community,

 

we have recently deployed  4 x 7710 with 5 VDCs each. We have enabled AAA on VDCs, so as to authenticate via TACACS and we are facing a problem with logins:

If the first attempt to authenticate to the device is unsuccessful (wrong password), when we then try to authenticate for the second/third time, the tacacs logs show username followed by #vdc_number# for the second attempt, #vdc_number##vdc_number# for the third attempt and the device responds with "too many authentication failures" (ssh  login attempts default value of 3). If we then login with the correct credentials everything is ok.

Apparently ISE drops the 2nd and 3rd request, due to unknown username. Why does the device add hash (#) followed by the vdc number, causing ISE to fail? Is there a way to overcome this?

 

Thank you in advance,

Katerina

 

 

Thank you in advance,

Katerina

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Re: Nexus 7710 authentication failures

Apparently the issue is with the client we use to login (secure crt). When we use putty, everything is ok
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