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

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http://bugzilla.xensource.com/cgi-bin/bugzilla/show_bug.cgi?id=62





------- Additional Comments From ian.pratt@xxxxxxxxxxxx  2005-06-11 14:12 
-------
I really worry about the whole interaction between dhclient and the xen network 
bridge setup scripts... 

We really want to switch dhclient over to maintain the lease on veth0 rather 
than eth0, but we currently don't. Given that eth0 has a dummy mac address, 
what 
actually happens when dhclient sends out a renew request? What src mac goes in 
the packet? Are lease renewals actually working at all in the current setup? 
(It 
would be good if someone set up a dhcp server with a short lease expiry and 
actually verify this).

It's pretty clear that we'll be in trouble if the lease ever expires as 
dhclient 
will down eth0 which won't actually remove the address from veth0. 

I'm not sure what the best fix for this is. Moving MAC and IP addresses between 
interfaces is just fraught with danger...

Do we have to add some kind of hack that detects dhclient/pump/dhcpcd running 
on 
eth0, re-writes the leases file and restarts the daemon on veth0? Gross!

Ian








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