[Bug 264198] bridge, ipfw: very slow network on bridge with IPFW, virtio or vtnet on 12.3-RELEASE-p5
Date: Wed, 25 May 2022 09:04:37 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264198 --- Comment #4 from Ole <email@example.com> --- I could reduce it even more. Seems that the vlan play no role here. I picked one VM on the hosts. Stopped IPFW on the hosts so network is fine. Then I crated a bridge and an epair like before: vtnet0---bridge0---epaira0---epairb0 vm # ifconfig bridge create mtu 1400 vm # ifconfig epair create mtu 1400 vm # ifconfig bridge0 addm epair0a vm # ifconfig bridge0 addm vtnet0 vm # ifconfig epair0a up vm # ifconfig epair0b inet <IP_ADDR>/28 mtu 1400 up vm # ifconfig bridge0 up vm # nc -v -l 2222 > /dev/null again, the only rule is vm # ipfw list 65535 allow ip from any to any from another host (in the same network) I send data with nc: dd if=/dev/zero bs=1024k count=6 | nc -v <IP_ADDR> 2222 result: 6291456 bytes transferred in 70.693446 secs (88996 bytes/sec) after 'service ipfw stop' on vm-a, it is about 700 times faster )-: 6291456 bytes transferred in 0.100673 secs (62493675 bytes/sec) So I think the problem is related to IPFW and bridges. Maybe the MTU plays a role here. -- You are receiving this mail because: You are the assignee for the bug.