El 14/04/15 a les 15.31, Gustau Pérez ha escrit:
>    Hi,
>    the box I'm doing testing with has all its interfaces set with mtu
> 9000. That is a problem at domain creation time, because taps are set to
> 1500, and bridge [1] is created with the mtu of the first interface added.
>    So if you're using an mtu different than 1500 (it could also be less
> than 1500 for any special reason) in an interface part of the bridge
> (and thus the bridge will have mtu != 1500) that would cause problems
> with the tap of the new domain.
>    I did a simple patch to tools/hotplug/FreeBSD/vif-bridge to get the
> bridge mtu and create the tap with the right mtu [2]. I'm not sure if
> this can be accomplished somewhere else, but I thought this way the
> bridge can be configured in rc.conf and our vif-bridge may be able to
> fetch the right mtu. Nothing from ports is used (sed from base system).

Thanks for the patch. In the description you mention tap interfaces,
which are used on HVM domains. Since the vif-bridge script is used to
add both tap and xnb interfaces to a bridge, have you tested if this
also work with PV domains that use the xnb interfaces?

Can you also send the patch upstream? There are guidelines about how to
do this at [1].


[1] http://wiki.xenproject.org/wiki/Submitting_Xen_Project_Patches

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