>Number: 176671
>Category: misc
>Synopsis: MAC address for epair device not unique
>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 Mar 05 22:20:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator: Shawn Webb
>Release: 10-CURRENT
>Organization:
>Environment:
FreeBSD shawn-vm-host 10.0-CURRENT FreeBSD 10.0-CURRENT #17 r247301+3c18d96:
Tue Feb 26 12:00:52 EST 2013 shawn@shawn-vm-host:/usr/obj/usr/src/sys/SEC
amd64
>Description:
The MAC address for two epair devices (VIMAGE kernel) are not unique, causing
issues with grabbing DHCP addresses and assigning IPv6 addresses. Here's what
ifconfig shows on two of my jails:
[root@shawn-vm-host ~]# jexec dns ifconfig
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
epair3b: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=8<VLAN_MTU>
ether 02:00:70:00:0b:0b
inet6 2001:470:8142:2::5 prefixlen 64
inet6 fe80::70ff:fe00:b0b%epair3b prefixlen 64 duplicated scopeid 0x2
inet 10.7.1.0 netmask 0xfffffe00 broadcast 10.7.1.255
nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
media: Ethernet 10Gbase-T (10Gbase-T <full-duplex>)
status: active
[root@shawn-vm-host ~]# jexec git ifconfig
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
epair4b: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=8<VLAN_MTU>
ether 02:00:70:00:0b:0b
inet6 2001:470:8142:2::6 prefixlen 64
inet6 fe80::70ff:fe00:b0b%epair4b prefixlen 64 scopeid 0x2
inet 10.7.1.0 netmask 0xfffffe00 broadcast 10.7.1.255
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
media: Ethernet 10Gbase-T (10Gbase-T <full-duplex>)
status: active
>How-To-Repeat:
Create epair3 and epair4 devices. Notice that both epair3b and epair4b have the
same MAC address.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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