[Pkg-xen-devel] bridging and peth0

Andy Smith andy at lug.org.uk
Sun Jul 15 04:13:19 UTC 2007


Hi,

If one sets xend to use network-bridge and there are no bridges
already present then it seems that xend will clone eth0 to peth0,
create xenbr0 and add peth0 and vif0.0 as ports on that bridge.

If on the other hand xenbr0 is created in /etc/network/interfaces
then xend will not do any of that peth0 stuff, nor will it add
vif0.0 to xenbr0, yet (barring some changes in iptables rules)
things still seem to work.

So my questions are:

1) What is the actual purpose of this cloning of eth0 to peth0?

2) Is creating the bridge in /etc/network/interfaces the preferred
   Debian way?

2a) If so, does the peth0 thing need to be done somehow too?

2b) And should vif0.0 be added to the bridge?  Various guides I have
    seen for Debian and Xen only add eth0.

Cheers,
Andy
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