P5/EWAN port MAC address changes on reboot

[nightcustard]

I'm running an 8900AX2400 running firmware 2.52.d52

I'm currently using my IP provider's modem with the 8900 as my router. The 8900 is connected to the modem via the P5/EWAN port.

To avoid double NAT issues, in the modem setup I assigned a fixed IP to the 8900 and put it in the DMZ - the problem I've encountered is the MAC address associated with the 8900 P5/EWAN port changed after I rebooted the 8900 so the modem naturally assigned it another IP address from the DHCP pool, which isn't in the DMZ.

Is a variable MAC address a 'feature' or a bug? If a 'feature', is there a way to stop it changing?

[billion_fan]

I'm running an 8900AX2400 running firmware 2.52.d52

I'm currently using my IP provider's modem with the 8900 as my router. The 8900 is connected to the modem via the P5/EWAN port.

To avoid double NAT issues, in the modem setup I assigned a fixed IP to the 8900 and put it in the DMZ - the problem I've encountered is the MAC address associated with the 8900 P5/EWAN port changed after I rebooted the 8900 so the modem naturally assigned it another IP address from the DHCP pool, which isn't in the DMZ.

Is a variable MAC address a 'feature' or a bug? If a 'feature', is there a way to stop it changing?

Try fixing the MAC via MAC spoofing (IPoE mode only)

(from my home 2400 I haven't experienced this with my Virgin Super Hub in modem only mode, in default mode without mac spoofing I get the same WAN IP from Virgin (after rebooting the virgin super hub), if I use the mac spoofing option eg changing my MAC address, I get a new IP address for virgin

[nightcustard]

Thanks billion_fan! I hadn't spotted that option on the IPoE parameter page. I've defined the MAC address and will check it survives a reboot when I can get away with an internet outage . Cheers, Mike