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Wednesday, 28 July 2010

UCS TACACS bug caused hardware reset

One of our Cisco UCS Fabric interconnect 6100 switches reset itself for no apparent reason.  A call to Cisco TAC, which progressed to dev found a problem caused by too many TACACS authentications causing a memory fault.

We use Zenoss for NMS which authenticates pretty frequently using TACACS .. and so pushed it over the limit.

The only fix is to switch back to local authentication until a patch is released.