From: Anton Gorlov <stalker@altlinux.ru> To: ALT Linux sysadmin discuss <sysadmins@lists.altlinux.org> Subject: [Sysadmins] libvirt bridge and udp checksum Date: Thu, 10 Dec 2015 23:58:48 +0300 Message-ID: <5669E788.1010600@altlinux.ru> (raw) КОллеги - в очередной раз наступил на старый баг при использовании virtio network адаптера в гостевом окружении. В обычном случае спасало правило iptables -t mangle -A POSTROUTING -o virbr0 -p udp -m udp --dport 68 -j CHECKSUM --checksum-fill Но в случае если бридж "свой" собственный то подобное правило не спасает. Можно конечно в гостевом окружении отключить tx checksum offload, но интересно почему в 1 случае правило спасает а во 2 нет? brctl show bridge name bridge id STP enabled interfaces br0 8000.7640d7486732 yes dummy0 vnet0 virbr0 8000.52540024aebf yes virbr0-nic
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