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From: | Michael Tokarev |
Subject: | Re: [Qemu-devel] net packet storms with multiple NICs |
Date: | Wed, 11 Nov 2009 12:23:01 +0300 |
User-agent: | Mozilla-Thunderbird 2.0.0.22 (X11/20090706) |
Paul Brook wrote:
I immediately reproduced the problem locally. It turns out that kvm reflects packets coming from one guest NIC on another guest NIC, and since both are connected to the same bridge we're getting endless packet storm. To a level when kvm process becomes 100% busy and does not respond to anything but `kill -9'.You created a network loop. It is working exactly as expected.Create the same topology with a physical network hub and a pair of NICs and you'll get the same end result.
Paul, I know what the result is. But mind you, I talked about something different, namely: why, using "obvious" way, you get a packet storm/loop instead of a working network. And if that loop is useful in the first place. I've got answers to both already :) Thanks /mjt
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