Re: more UDP packet loss?

[Urban Boquist <urban%boquist.net@localhost>]

>>>>> Jean-Yves Migeon writes:

Jean-Yves> Urban Boquist wrote:
>> Every time I start a domU I see lost DHCP replies and lots of NFS
>> retransmits. 

I think I found the cause of this. It is caused by the Spanning Tree
protocol on the physical interface in the bridge.

This was my /etc/ifconfig.bridge0:

create
!brconfig $int add wm0 stp wm0 up

if I remove "stp wm0" I don't see the lost DHCP packets during boot.

Adding "fwddelay 1" also makes the problem go away.

But this confuses me a little, brconfig(8) says:

     stp interface
             Enable Spanning Tree protocol on interface.  The bridge(4) driver
             has support for the IEEE 802.1D Spanning Tree protocol (STP).
             Spanning Tree is used to detect and remove loops in a network
             topology.

     fwddelay seconds
             Set the time that must pass before an interface begins forwarding
             packets when Spanning Tree is enabled.  The default is 15 sec-
             onds.  The minimum is 1 second and the maximum is 255 seconds.

Is the intention really that the delay should happen for _every_
interface that is added to the bridge, even if STP is only enabled on
one of the interfaces in the bridge?

BR,
        -- Urban