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We have configured our Cat4006 L3 Card to use HSRP (across 2 L3 switches) and have configured the interfaces on the L3 Card on GigEthernet3 & 4 using sub-interfaces. Works ok but the sub interfaces have the same MAC address as the main Gig Interf...
Well we found the problem. The error mesages were due to the Device having the same MAC address on all Sub interfaces in the L3 Card - but it was our management system which obviously had different IP address settings for the interfaces in the datab...
