05-26-2008 08:32 AM - edited 03-11-2019 05:50 AM
The firewall syslog message shows "..Received ARP response collision from 10.168.1.254/001d.e6f2.f7c0 on interface Inside. I can not see any documentation for 10.168.1.254/001d.e6f2.f7c0. Any suggestions on how to track the IP/mac address? Thanks
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05-26-2008 10:45 AM
Firstly - what device on your network has the address 10.168.1.254?
Secondly - have you traced the device that has MAC address 001d.e6f2.f7c0
Arp collisions are - interesting, to fully understand why you are seeing them, you need to know the answer to the above questions?
05-26-2008 01:16 PM
the link below describes the password recovery procedure for the Cisco Catalyst switches you are using. you will need to Power the switch and bring it to the switch: prompt so yes the password recovery will affect production so i suggest you do it out of work hours
05-26-2008 09:29 AM
Well that mac address is a Cisco mac address - so I would check your configuration on your layer 3 devices!
To track it down - in your core router:-
show arp | inc 001d.e6f2.f7c0 or show arp | inc 10.168.1.254
HTH.
05-26-2008 09:52 AM
Do you know why there would be a ARP response collision?
05-26-2008 09:06:55 Local4.Warning 10.168.1.10 May 26 2008 09:10:56: %ASA-4-405001: Received ARP response collision from 10.168.1.254/001d.e6f2.f7c0 on interface Inside
Thanks
05-26-2008 10:45 AM
Firstly - what device on your network has the address 10.168.1.254?
Secondly - have you traced the device that has MAC address 001d.e6f2.f7c0
Arp collisions are - interesting, to fully understand why you are seeing them, you need to know the answer to the above questions?
05-26-2008 11:05 AM
Why would the firewall log a ARP response collision? I believe the IP may be associated with Cisco switches: 2 x 2960G and 3560G. We are on one network/subnet. I recently configured a network 2 months ago and forgot where I documented the passwords to the switches and if I assigned IPs to the switches. Any suggestions to password recovery on the switches? Would password recovery procedure on the switches effect production environment? Thanks.
05-26-2008 01:16 PM
the link below describes the password recovery procedure for the Cisco Catalyst switches you are using. you will need to Power the switch and bring it to the switch: prompt so yes the password recovery will affect production so i suggest you do it out of work hours
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