Re: [Xen-users] xen and bonding

[Mike Williams <mike.williams@xxxxxxxxxx>]

On Monday 19 June 2006 18:52, Mike Williams wrote:
> I suppose my question really is, how can I run Xen in bridging mode without
> it moving interfaces/IPs/MACs around?
> I can't see anyway for getting the MII information into a VM when it isn't
> in fact attached to the actual physical interfaces at all.
> From reading the documentation, I understand (a little) why this moving of
> interfaces happens, but I don't need to be able to separately firewall the
> host, the VMs will all be on physically separate networks.
> So far my experiments with hacking network-bridge have been less then
> successful. Occasionally, for no apparent reason traffic in and out of the
> VM works, but mostly it doesn't.

In case anyone was wondering, I've sorted it.
Some of the issue was apparently down to network cards. I was using a 4 port 
d-link branded card (sundance module), I'm now using a pukker intel 2 port 
card (e1000) and 2 cheap-ass realteks. The traffic to/from the realteks can 
take a little while to get going.

In a copy of network-bridge I've changed the op_start() and op_stop() 
functions to:

op_start () {
        if [ "${bridge}" = "null" ] ; then
                return
        fi

        create_bridge ${bridge}

        add_to_bridge ${bridge} ${vif0}
        add_to_bridge2 ${bridge} ${netdev}

        if [ ${antispoof} = 'yes' ] ; then
                antispoofing
        fi
}

op_stop () {
        if [ "${bridge}" = "null" ]; then
                return
        fi
        if ! link_exists "$bridge"; then
                return
        fi

        ip link set ${bridge} down
        brctl delif ${bridge} ${netdev}
        brctl delif ${bridge} ${vif0}
        brctl delbr ${bridge}
}


-- 
Mike Williams
System Administration Manager - Comodo
Office Tel Europe: +44 (0) 161 8747070
Fax Europe: +44 (0) 161 8771767

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