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[Xen-bugs] [Bug 62] Losing network when xend started

To: xen-bugs@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-bugs] [Bug 62] Losing network when xend started
From: bugzilla-daemon@xxxxxxxxxxxxxxxxxxx
Date: Fri, 17 Jun 2005 09:05:05 +0000
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------- Additional Comments From ian.pratt@xxxxxxxxxxxx  2005-06-17 09:05 
Hmm, I'll take a guess at the problem:

The /etc/xen/network script executes the following lines, which I'm guessing 
responsible for the messages.
        ifconfig ${netdev} -arp down
        ifconfig ${netdev} hw ether fe:ff:ff:ff:ff:ff up

I wander whether there's a race between the interface coming fully back up, and 
being added to the bridge. I'd have thought it shouln't matter whether auto 
negotatiation etc had completed before the 'brctl add', but perhaps there's 
something weird about the e1000. It might be something as daft as the bridge's 
attempt to switch the interface to promiscuous mode being lost if the card is 
part way through auto neg.

Please could you try adding a 'promisc' to the 'up' line above.
Alternatively, you could try adding a delay, but there's not really any such 
thing as a safe delay as autoneg can take ages with some switches.

I guess we could poll once a second for 10s to see if the interface goes up, 
else continue anyway and hope for the best.

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