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Avoiding Unifi "Multiple devices sharing IP" (due to MAC vlan, eth0 nic using same mac for native and vlan70)

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My unifi network keeps alarming me like this

Quote

Multiple devices are using the same IP address: 192.168.20.28. Please check each device's configuration to ensure none are communicating with a rogue DHCP server.

 

Its my unraid server; the NIC interface is used in two distinct VLANs. 

 

root@tower:~# ifconfig | grep 02:d2:39:7f:d8:4e -B4 -A4
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vhost0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.20.28  netmask 255.255.255.0  broadcast 0.0.0.0
        ether 02:d2:39:7f:d8:4e  txqueuelen 500  (Ethernet)
        RX packets 798506  bytes 114513804 (109.2 MiB)
        RX errors 0  dropped 3  overruns 0  frame 0
        TX packets 266397  bytes 325195494 (310.1 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
--
        TX packets 1  bytes 90 (90.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vhost0.70: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 02:d2:39:7f:d8:4e  txqueuelen 500  (Ethernet)
        RX packets 125353  bytes 7520476 (7.1 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 7  bytes 586 (586.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

 

 

How can I change the MAC address that vlan70 is using (same physical NIC)?

  • 2 months later...

I am seeing the same issue (no bridging enabled): eth0 and vhost0 have the same IP and different MACs

 

There are useful answers in this new thread:

 

 

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