On 05/dic/2012, at 08:08, Gao Yongwei <itxx00@gmail.com> wrote:
provide your os version and libvirt version plz. and use the following command to check the tc mtu size: tc filter list dev vnet0 root if the mtu size in the output is not 64kb,then you must update your libvirt to 0.9.11 or later.
Thanks Gao (and you all) for the reply and sorry for the multiple post, I'm using libvirt 0.9.8 on Ubuntu 12.04 and, yes, mtu is not 64k: !(~) # tc filter list dev vnet43 root filter parent ffff: protocol ip pref 49152 u32 filter parent ffff: protocol ip pref 49152 u32 fh 800: ht divisor 1 filter parent ffff: protocol ip pref 49152 u32 fh 800::800 order 2048 key ht 800 bkt 0 flowid :1 match 00000000/00000000 at 12 police 0xa rate 20480Kbit burst 2560Kb mtu 2560Kb action drop overhead 0b ref 1 bind 1 I'll update asap. Thanks again, Davide.