03-15-2013 01:40 PM - edited 03-07-2019 12:16 PM
I have two 2960's in this new environment that I am administering. I am receiving a message on one unit (Designate it 2960-2) of %IP-4-DUPADDR: Duplicate address 192.168.168.8 on Vlan1, sourced by 3037.a63e.540. The "sourced by" address is the 2960-1. I am new to the Cisco environment and do not know how these units were originally set up. How can I determine where the duplicate address is originating from.When I perform an ARP -a the address that corresponds to the 192.168.168.8 is the mac address of the ethersvi interface on the 2960-1. I know this should not be that difficult, but I am at a loss at this point.
Thanks in advance
03-15-2013 01:53 PM
Hello Nicholas
It sounds like the duplicate address on originating from 2960-1.
If you know where at least one of interfaces this ip address resides, shut that interface down and then try to ping this address again, also
sh mac-address address 3037.a63e.540
From this you will able to trace the second interface which is conflicting.
res
Paul
Please don't forget to rate this post if it has been helpful.
03-15-2013 10:16 PM
dont forget the pipe:
sh mac addr | i 3037.a63e.540
that will show you the port it is associated with. then do a:
sh cdp neigh fx/x detail
that will give you the ip of the device. once you remte into that device - repeat the mac address command until you get to the switch. once you remote into the 2960-1, do a:
config t
int vlan 1
ip address 192.168.168.x 255.255.255.0 (or whatever the subnet is)
no shut
and you should be good to go.
i hope i read that question right and answered it correctly for you : )
03-15-2013 03:29 PM
MAC Address "3037.a63e.540" is a Cisco device.
So if you have two Cisco appliance in your environment, you may want to look at the second one.
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