We have been using Xen as our vm only recently (about a year now). We recently started to look at the tcp flow control that is coming in and out of the VM. Our configuration is that a physical interface on the host, peth1, is connect to vif1.1 by bridge br1, vif1.1 is instantiated as eth1 inside the vm. We have a data source attached to eth1 that over subscribe the data capacity of peth1. Using pcap on all 4 location, we see that flow control is correctly enforced on peth1 but goes no further. Is there a way to extend the flow control all the way into the vm onto eth1? Thanks, Ben Wang DRS Defense Solutions bwang@cengen.com _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
bwang@cengen.com wrote:>We have a data source attached to eth1 that over subscribe the data >capacity of peth1. Using pcap on all 4 location, we see that flow >control is correctly enforced on peth1 but goes no further. Is >there a way to extend the flow control all the way into the vm onto >eth1?This would be flow control, as in the hardware support at the ethernet link layer ? I think that would not make sense in a virtual switch - there is no limit to available bandwidth on these links, and in theory no limit on available packet buffer. Would enforcing flow rate limits via tc rules do the job ? -- Simon Hobson Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed author Gladys Hobson. Novels - poetry - short stories - ideal as Christmas stocking fillers. Some available as e-books. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users