Network Interfaces MAC address problem

Nasz — Wed, 04 Jun 2025 21:42:55 GMT

Hi Guys,

I need some help, because maybe I have a problem. So we have 2 FAS2040 storage systems, and we configured 3 phisical network interfaces (e0b, e0c, e0d) into a VIF. Couple a day ago we had some network problem, and we recognized that the all network interfaces (e0a, e0b, e0c, e0d) have a same mac address (not only the VIF's members). I think is not a normal operation (perhaps I'm wrong).

So how to resolve or repair this problem? I attached the ifconfig all result:

filer2> ifconfig -a
e0a: flags=0x1f4c867<UP,BROADCAST,RUNNING,MULTICAST,TCPCKSUM> mtu 1500
        inet 172.30.30.35 netmask 0xffffff00 broadcast 172.30.30.255
        partner e0a (not in use)
        ether 00:a0:98:58:f4:33 (auto-1000t-fd-up) flowcontrol full
e0b: flags=0x9f4c867<UP,BROADCAST,RUNNING,MULTICAST,TCPCKSUM> mtu 1500
        ether 02:a0:98:58:f4:33 (auto-1000t-fd-up) flowcontrol full
        trunked trunk
e0c: flags=0x9f4c867<UP,BROADCAST,RUNNING,MULTICAST,TCPCKSUM> mtu 1500
        ether 02:a0:98:58:f4:33 (auto-1000t-fd-up) flowcontrol full
        trunked trunk
e0d: flags=0x9f4c867<UP,BROADCAST,RUNNING,MULTICAST,TCPCKSUM> mtu 1500
        ether 02:a0:98:58:f4:33 (auto-1000t-fd-up) flowcontrol full
        trunked trunk
e0M: flags=0x2b4c867<UP,BROADCAST,RUNNING,MULTICAST,TCPCKSUM,MGMT_PORT> mtu 1500
        inet 192.168.100.197 netmask 0xffffff00 broadcast 192.168.100.255 noddns
        partner inet 192.168.100.196 (not in use)
        ether 00:a0:98:58:f4:38 (auto-100tx-fd-up) flowcontrol full
e0P: flags=0x2b4c867<UP,BROADCAST,RUNNING,MULTICAST,TCPCKSUM,ACP_PORT> mtu 1500 PRIVATE
        inet 192.168.2.79 netmask 0xfffffc00 broadcast 192.168.3.255 noddns
        ether 00:a0:98:58:f4:37 (auto-100tx-fd-up) flowcontrol full
lo: flags=0x1b48049<UP,LOOPBACK,RUNNING,MULTICAST,TCPCKSUM> mtu 8160
        inet 127.0.0.1 netmask 0xff000000 broadcast 127.0.0.1
        ether 00:00:00:00:00:00 (VIA Provider)
losk: flags=0x40a400c9<UP,LOOPBACK,RUNNING> mtu 9188
        inet 127.0.20.1 netmask 0xff000000 broadcast 127.0.20.1
trunk: flags=0x22f4c863<UP,BROADCAST,RUNNING,MULTICAST,TCPCKSUM> mtu 1500
        inet 172.30.30.36 netmask 0xffffff00 broadcast 172.30.30.255
        partner trunk01 (not in use)
        ether 02:a0:98:58:f4:33 (Enabled interface groups)

thanks Laszlo

Re: Network Interfaces MAC address problem

SeanHatfield — Tue, 22 Mar 2016 13:35:39 GMT

The MAC address on e0a is:

ether 00:a0:98:58:f4:33

The MAC address of the interface group members is:

ether 02:a0:98:58:f4:33

The 02 in the first octect indicates its a vif/ifgrp. The first mac on the system, in this case the one for e0a, is used as a base.

topic Re: Network Interfaces MAC address problem in ONTAP Discussions

Network Interfaces MAC address problem

Re: Network Interfaces MAC address problem