Gratuitous ARP packet from 0.0.0.0 made IP Conflict

[Mohamed.Maslouh]

Hi,

I have Windows servers that fall with an IP conflict on every reboot.

When I checked the Windows server event log, I found a Cisco device with the MAC address "88-90-8D-18-4B-0C" as the source of the conflict.

"The system detected an address
conflict for IP address 0.0.0.0 with the system having network hardware address
88-90-8D-18-4B-0C. Network operations on this system may be disrupted as a
result."

I checked my network to find if there is a Cisco device with this mac address, but nothing was found.

I suspect on the hosting side or the ISP side, because we are using a LAN to LAN link through a local ISP.

Is there a way to find the Cisco device model using the mac address ??

[antonioxud80]

hi,

try this

show ip arp x.x.x

sh mac address-table interface ...

also show cdp neighbor can help

[MHM Cisco World]

https://www.cisco.com/c/en/us/support/docs/ios-nx-os-software/8021x/116529-problemsolution-product-00.html

[paul driver · Accepted solution]

Hello
If you cannot find the cisco device to turn of GARP (gratuitous arp)  try turning it off on the window servers and test again.- here