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Date:      Wed, 25 Nov 2009 22:39:04 +0000
From:      Paul Grave <paul@stomer.net>
To:        freebsd-questions@freebsd.org
Subject:   DHCP on bridge0 fails on boot
Message-ID:  <0D259D8F-9278-45F5-956F-B5C82A7A78B9@stomer.net>

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I need some help configure DHCP on my bridge.  I'm pretty much out of =
ideas, so I'd be grateful for any help. =20

On boot, I want my FreeBSD install to create a bridge, add a couple of =
interfaces to it (re0 and tap0), and they receive an IP address via =
DHCP.=20

Here are the relevant lines in rc.conf:

cloned_interfaces=3D"bridge0"
autobridge_interfaces=3D"bridge0"
autobridge_bridge0=3D"tap* re0"
ifconfig_re0=3D"up"
ifconfig_bridge0=3D"up"
ifconfig_bridge0=3D"DHCP"

Whilst my system is booting I see this:
"Waiting 30s for the default route interface"
When that message is being display I can also see output similar to =
ifconfig's.  I can see that both bridge0 and re0 are up.  I can also see =
that re0 has a status or "no carrier".  I'm not sure if that is =
significant or not.=20

If I look at dmesg, "re0: link state changed to UP" is right at the =
bottom and ifconfig displays something similar to this:

re0: flags=3D8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric =
0 mtu 1500
	=
options=3D3898<VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_UCAST,WOL_MCAST,WOL=
_MAGIC>
	ether 00:1c:c0:de:9d:39
	media: Ethernet autoselect (1000baseT <full-duplex>)
	status: active
plip0: flags=3D8810<POINTOPOINT,SIMPLEX,MULTICAST> metric 0 mtu 1500
lo0: flags=3D8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
	options=3D3<RXCSUM,TXCSUM>
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3=20
	inet6 ::1 prefixlen 128=20
	inet 127.0.0.1 netmask 0xff000000=20
bridge0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 =
mtu 1500
	ether 76:15:56:05:de:63
	id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
	maxage 20 holdcnt 6 proto rstp maxaddr 100 timeout 1200
	root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
	member: re0 flags=3D143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
	        ifmaxaddr 0 port 1 priority 128 path cost 20000
	member: tap0 flags=3D143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
	        ifmaxaddr 0 port 5 priority 128 path cost 2000000
tap0: flags=3D8942<BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 =
mtu 1500
	ether 00:bd:a0:b1:00:00
	Opened by PID 1027

--
Paul Grave=20
email: mailto:paul@stomer.net




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