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cisco switch 4506 SSH and telnet not working after few days

Cisco Switch 4506 SUP-4 ,  VRF Running ,

SSH and telnet Session not able take control the switch , Console working fine .

WorkAround : 

1) Reload ( its will work more than 10 days and Stoped the SSH and Telnet Session )

2) Line VTY 0 4 , no exec  (its working not more than 3 days and ssh and telnet not working)

3) instead of MGT IP ,open SSH with  Other VRF IP SSH working  ,than tried MGT IP its working for few days , than Stoped SSH and telnet .

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cisco switch 4506 SSH and telnet not working after few days

Could be an IOS bug.

Can you console into the blade?  If you can't or you're getting "Low memory" or something then it's an IOS bug alright.

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