[Xen-users] Changing MTU of vif

[Tracy R Reed <treed@xxxxxxxxxxxxxxx>]

Anyone know how I can automatically set the MTU on a vif when I create 
the domain? I am using AoE to provide a SAN for my virtual machines and 
I create a bridge called stbr0 which I connect to eth1 in my domU. I 
want it to have an mtu of 9000 for performance reasons.
I am using CentOS 5 and I see that the default vif creation script is 
vif-bridge. I have tried changing vif-bridge like so:
case "$command" in
    online)
        setup_bridge_port "$vif"
        add_to_bridge "$bridge" "$vif"
        if [ ${bridge} = "stbr0" ]; then
                ip link set ${dev} mtu 9000
        fi

so if the bridge we are adding the vif to is stbr0 then we set the mtu 
to 9000. But this causes the xm create command to hang and I'm not sure why.
Any suggestions on how to get a vif set up with an mtu of 9000? It 
doesn't seem that I can just say mtu= in the vif= line in my domain 
config file.
--
Tracy R Reed                  Read my blog at http://ultraviolet.org
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