I have a 6509 with 2x sup1a and 2xmsfc. I upgraded the catos to 8.2.1 re-booted and the switch seemed fine, i then upgraded the msfc on the supervisor in slot 2 (standby) to 12.1.19 (dsv image) re booted and almost immediately started to notice unusual behaviour - thanks mostly to hp openview - certain vlan interfaces not responding to pings or maybe just responding once. A debug icmp on the msfc showed it sending replies to several different interfaces on the other msfc, even hsrp virtual addresses when this msfc was the actiuve router for that particular vlan, but the interfaces still seemed to be forwarding packets.
I held off upgrading the other msfc until i can get a better idea of what is happening.
Having been unable to sort out the problem i re-loaded the old image booted to that image, the problem remained, i did a cold boot of the entire switch the problem remained, i even erased the config reset the msfc and re entered the config but the problem remains.
The other msfc still running the old code (12.1.2) has performed perfectly throughout.
Has anyone seen anything remotely like this before. The behaviour is so erratic that i do not have enough room here to describe it all.
regards
mark
