Date: Thu, 25 Jun 2009 14:54:57 -0500 From: Adam Vande More <amvandemore@gmail.com> To: freebsd-questions@freebsd.org Subject: vde2 tap brings down external networking Message-ID: <6201873e0906251254m1a5ccd9do6479f71310f831b@mail.gmail.com>
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I'm trying to network a couple of qemu vm together and to the outside
world. After much pain and gnashing of teeth I found a setup that works
temporarily. I start both vm's with a command similar to this:
vde_switch -hub -tap /dev/tap0
chmod -R 666 /var/run/vde.ctl
vdeqemu -vga cirrus -localtime -hda linux-boot-0.img -hdb linux-boot-1.img \
-hdc linux-data-0.img -hdd linux-data-1.img -m 392 -boot c -kernel-kqemu
ipfw divert and natd are present.
ifconfig looks like this:
midco# ifconfig
xl0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=9<RXCSUM,VLAN_MTU>
ether 00:04:76:d2:50:25
media: Ethernet 10baseT/UTP (10baseT/UTP <half-duplex>)
status: active
nfe0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0
mtu 1500
options=19b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4>
ether 00:04:4b:04:01:28
inet 208.107.54.67 netmask 0xfffffe00 broadcast 208.107.55.255
media: Ethernet autoselect (100baseTX <full-duplex,flag0,flag1>)
status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
inet6 ::1 prefixlen 128
inet 127.0.0.1 netmask 0xff000000
bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu
1500
ether e6:56:26:6d:f8:f8
inet 192.168.0.1 netmask 0xffffff00 broadcast 192.168.0.255
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: nfe0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
ifmaxaddr 0 port 2 priority 128 path cost 200000
ipfw show:
midco# ipfw show
65535 1483037 1334261656 allow ip from any to any
once I add tap0 to bridge0 I have only a few minutes to access my external
network. Once it goes down, I am unable to revive via normal methods eg
/etc/rc.d/netif restart && /etc/rc.d/routed restart. Anything going to
external network timeouts, but tap/vm stuff is great. Even destroying
vm's/bridge/tap and bringing everything up doesn't restore networking, I
have to reboot. netstat -nr looks the same before and after.
midco# netstat -nr
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
default 208.107.54.1 UGS 0 591581 nfe0
127.0.0.1 127.0.0.1 UH 0 24 lo0
192.168.0.0/24 link#4 UC 0 0 bridge
208.107.54.0/23 link#2 UC 0 0 nfe0
208.107.54.1 00:13:5f:05:e3:d9 UHLW 2 0 nfe0 1198
Internet6:
Destination Gateway Flags
Netif Expire
::1 ::1 UHL
lo0
fe80::%lo0/64 fe80::1%lo0 U
lo0
fe80::1%lo0 link#3 UHL
lo0
ff01:3::/32 fe80::1%lo0 UC
lo0
ff02::%lo0/32 fe80::1%lo0 UC
lo0
/var/log/messages only had arp stuff relating to bridge which I suppressed.
Thanks,
PS bring up qemu networking in multicast mode to achieve this hangs my cable
modem.
--
Adam Vande More
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