Hi,
I've been encountering some problems with bridging under linux
2.6.12-9 (ubuntu Breezy Badger). Apologies for the newbie-ish email:
problem is likely a config issues, but docs appear to be sparse and I
can't find much reference to the problem/solution on the 'net; trial
and error really isn't working...
Am attempting to bridge an offsite network to the central network
over the internet with vtun (2.6-4). The configuration I have works
intermittently. vtun seems to work reliably - am using the -p
(persist) option to force reconnect on disconnect. However I have
the following problems:
1) On system startup vtun connects to the server correctly, but
the bridge does not come up. (my vtund.conf attached)
brctl show - shows the "brookf" bridge, but 'Interfaces' declares:
"can't get port info: Function not implemented"
Restarting vtun with /etc/init.d/vtun restart brings the bridge up
correctly. Why is this? Currently I'm having to restart vtun on
system startup to have it function at all.
2) At the moment if I perform /etc/init.d/vtun restart as often as
not there will be a kernel bug dump to the console. It begins:
<kernel BUG at <bad filename>:21387!
invalid operand: 0000[#1]
... Process brctl
(For some reason it's not being logged to kern.log, but I could
attempt to resolve that and get the whole dump if it would be useful...)
From then on, ifconfig, hangs the console, as does sudo. Also
restart/halt freezes on putting down the interfaces. This means
that, with the persist option (as up/down are called on every connect/
disconnect), the box quickly becomes unusable.
I've read that there may be issues with IPv6 and kernel support.
Although I don't use it, it's enabled by default on this kernel -
should this be disabled?
I presume I'm doing something wrong in the vtund.conf. Should I be
creating and removing the bridge here, or should I create the bridge
once when the system starts up? How would vutn interact with the tap
interface - should I configure it (eg tap0) with IP 0.0.0.0 on
startup, then specify the interface in vtun and change persist yes; -
> persist keep;?
If anyone can give any suggestions, I would be most grateful!
Many thanks,
James
persist yes;
type ether; # Ethernet tunnel
up {
program /usr/sbin/brctl "addbr brookf";
ifconfig "%% 0.0.0.0"; #i.e. first available tap interface
ifconfig "eth1 down";
ifconfig "eth1 promisc";
program /usr/sbin/brctl "addif brookf %d";
program /usr/sbin/brctl "addif brookf eth1";
#Bring the bridge up
ifconfig "eth1 0.0.0.0";
ifconfig "brookf 172.28.22.223 netmask 255.255.255.0";
};
down {
ifconfig "brookf down";
ifconfig "%% down";
ifconfig "eth1 down";
# Clear up bridge stuff
program /usr/sbin/brctl "delif brookf %%";
program /usr/sbin/brctl "delif brookf eth1";
program /usr/sbin/brctl "delbr brookf";
};
