What is network.throttling.rate and vm.network.throttling.rate set to in global settings?
Please correct me if I'm wrong about how these global settings work, but I think these values override the templates. On Tue, Dec 4, 2012 at 2:58 AM, Wolfram Schlich <li...@wolfram.schlich.org>wrote: > Hi! > > Does a router VM have another kind of network rate > limitation besides the one from the network offering? > > We have the network offering set to 4000 Mbit/s > which is resembled by XenServer through limiting > the interface bandwidth to 500MByte/s (checked that). > > With unrouted traffic within a CloudStack network > (between instances running on different nodes that > all have 10 GbE links), the instances peak at the > configured 4000 Mbit/s (so, as expected). When > doing routed traffic between different CloudStack > networks (passing 2 router VMs), the same test peaks > at around ~920 Mbit/s while the router VM CPU shows > to idle about 99% (25k interrupts/s). > > The instances used for testing as well as the router > VMs run on Citrix XenServer 6.0.2 and are all using > xen_netfront as the virtual ethernet driver (which > does not even supply a speed value to the VM). > > I've also looked for any kind of tc/iptables rules > on the router VM but couldn't find any that seem > relevant for this issue. > > Ideas, anyone? :-) > > Cheers, > Wolfram >
