03-05-2018 07:13 AM - edited 03-08-2019 02:08 PM
Hi In Nexus7k, two ip address have one same mac address in different two port when using command
show ip arp | i x.x.x.x, for example show ip arp | 10.1.1.2 and 10.1.1.3
How does it cause the situation? Thanks
03-05-2018 07:53 AM
03-05-2018 08:54 AM
Hi,
Mostly i notes the same while a user got ip from DHCP (DHCP SERVER may on switch) and after some time user moved with static ip. Then we can see this issue.
But it was not generate any issue for me yet. One time i was notes with a AP when I was moved the AP from one management to another management vlan and AP was getting the old ip in new vlan. Then I was manual clear the arp for it. And after that it was working fine.
Regards,
Deepak Kumar
03-05-2018 11:14 AM
Another way that you could get multiple IP addresses that have the same mac address in the arp table is from proxy arp (or perhaps from arp). If 10.1.1.2 and 10.1.1.3 are both reached through some device and if that device is responding to arp requests for those addresses then both addresses would appear in the arp table and both addresses would show the same mac address.
HTH
Rick
03-05-2018 07:08 PM
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