[Xen-users] Network routing performance problem

[Ralf Müller <ralf@xxxxxxxx>]

Hello out there,

I've stumbled over a strange problem with my Xen setup. Using Xen 3.1  
on OpenSuSE 10.3 I installed several domU's. One of them - called  
"gate" - is acting as a router between two xen bridges - xenbr0 and  
xenbr1.
When using scp from a domU, which has to route via "gate" because it  
is only bound to xenbr0, to a system connected via ethernet to peth1  
I get extremely low transfer rates - down to 10kB/sec.
Transfers to this system are as fast.
Transfers of physical systems via "gate" are fast in any direction.
Transfers between domU's are fast - ok they don't have to use "gate",  
as all of them are bond to xenbr0.
Transfers to and from "gate" are fast.

Just transfers to physical systems, via "gate" from a domU are slow  
as hell.
There is no firewall activated, there is no traffic shaper. Using  
flood ping I can't see loss of packets.
Does anybody out there has an idea where to look for a solution of  
this problem?
Thanks Ralf

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