misc/71450: MAC address change on 21040 "Tulip" Ethernet Adapter does not work

[paul van maaren]

>Number:         71450
>Category:       misc
>Synopsis:       MAC address change on 21040 "Tulip" Ethernet Adapter does not work
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Sep 07 07:40:23 GMT 2004
>Closed-Date:
>Last-Modified:
>Originator:     paul van maaren
>Release:        4.9
>Organization:
le reseau
>Environment:
FreeBSD fw.vanmaaren.org 4.9-RELEASE FreeBSD 4.9-RELEASE #6: Mon Sep  6 14:45:31 CEST 2004     root at fw1-uk.vanmaaren.org:/usr/src/sys/compile/firewall  i386
>Description:
On a FreeBSD 4.9 machine I want to change the MAC address on a DecChip
21040 "Tulip" Ethernet Adapter. Using ifconfig it shows the changed
MAC address but on the wire it does not use it, but the mac address of
the card itself.
>How-To-Repeat:
# ifconfig de0 down
# ifconfig de0 link 00:00:00:12:34:56
# ifconfig de0
de0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
        inet 0.0.0.0 netmask 0xff000000 broadcast 255.255.255.255
        ether 00:00:00:12:34:56
        media: Ethernet autoselect (10baseT/UTP)
        status: active
# dhclient de0

In another window:
# tcpdump -n -e -i de0
tcpdump: listening on de0
09:49:28.015226 8:0:2b:e6:d4:26 ff:ff:ff:ff:ff:ff 0800 342: 0.0.0.0.68 >
255.255.255.255.67:  xid:0xe6cecc20 ether 0:0:0:12:34:56 [|bootp] [tos 0x10] 

>Fix:
      
>Release-Note:
>Audit-Trail:
>Unformatted: