Date: Wed, 10 Feb 2021 23:26:47 +0000 From: Pete French <petefrench@ingresso.co.uk> To: FreeBSD Stable Mailing List <freebsd-stable@freebsd.org> Subject: DHCP and chnaging the MAC address on a network card Message-ID: <ffdbd6db-7788-3934-760e-82a32f2edecf@ingresso.co.uk>
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I have a machine runnign 12-STABLE, which gets its upstream IP address from my ISP using DHCP over a cable modem. What I just tried to do was to set the MAC address on that interface at boot time, but if I do that then it no longer acquires a DHCP address from the upstream. Is there something going on here I dont understand ? The interfaces are 'bge' and I have a file called /etc/start_if.bge0 whcih contains: /sbin/ifconfig $1 ether d0:bf:9c:46:a3:7c and this works (have tried it on bge1 and another machine) in changing the MAC address. But if i do that on the DHCP interface then it doesnt get an IP address. Any hints ? -pete. PS: reason am doing this is my ISP will (in future) be able to give me a static IP address basd on the MAC address. Which is lovely, but I have a spare server I use when this one goes down, so was hoping to have the same MAC address if I boot the same drive, to avoid any issues caused by the MAc address chnaging if I chnage the hardware. But it doesnt work. :)
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