[Xen-devel] xen-unstable networking

[Chris Andrews <chris@xxxxxxxxxx>]

Hi,

I've been running xen-unstable quite successfully; the virtual disks 
and new console code seem fine. I've got some problems with the 
networking though, but I'm not sure if I'm trying to do something 
that's impossible with the current VFR code.
I'm trying to make Xen's internal network among the domains available 
to a vpn: the machine is allocated a network in the vpn, 
192.168.101.0/24, and domain 0 has an IP tunnel to the vpn server and a 
single IP address in that network, 192.168.101.254. This network is 
made visible from the vpn by routing daemons running in domain 0. This 
much works and domain 0's vpn connectivity is fine.
The other domains then have addresses in 192.168.101.0/24, e.g. 
192.168.101.1 for domain 1, with the address added to the VFR for that 
domain's vif 0 and the address added as a secondary on the domain's 
eth0. The domain then has a default route via 192.168.101.254. Domain 0 
has /proc/sys/net/ipv4/ip_forward set to 1. I can ping between domains, 
and between domain 0 and other domains using 192.168.101.x addresses.
However, while packets from the vpn are correctly routed to domains 
other than 0, packets from those domains appear directly on the 
physical ethernet rather than being routed via domain 0 and down the 
vpn tunnel. This does seem to to be working as designed in that the 
domain has access to the physical ethernet for addresses which have 
been added to its vif, but it would be useful for this situation if the 
packets could go via domain 0. Is this something which can be done with 
the current code?

Cheers,
Chris.



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