Ubuntu 20.04.5 LTS xen-hypervisor-4.11-amd64 4.11.3+24-g14b62ab3e5-1ubuntu2.3
Reverted back to kernel 5.4.0-135 and bridging with Xen VMs is working again. Spent the day trying to work out why bridging suddenly stopped working. Guest is 18.04.6 LTS. I'm pretty sure that under 137, the path cost was 100 for enp6s0f0, instead of the 19 it shows now. brctl showstp xenbr1 xenbr1 bridge id 8000.90e2ba065da8 designated root 8000.90e2ba065da8 root port 0 path cost 0 max age 20.00 bridge max age 20.00 hello time 2.00 bridge hello time 2.00 forward delay 15.00 bridge forward delay 15.00 ageing time 300.00 hello timer 0.00 tcn timer 0.00 topology change timer 0.00 gc timer 230.64 flags enp6s0f0 (1) port id 8001 state forwarding designated root 8000.90e2ba065da8 path cost 19 designated bridge 8000.90e2ba065da8 message age timer 0.00 designated port 8001 forward delay timer 0.00 designated cost 0 hold timer 0.00 flags vif1.0 (2) port id 8002 state forwarding designated root 8000.90e2ba065da8 path cost 100 designated bridge 8000.90e2ba065da8 message age timer 0.00 designated port 8002 forward delay timer 0.00 designated cost 0 hold timer 0.00 flags -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-meta in Ubuntu. https://bugs.launchpad.net/bugs/2002834 Title: Network bridge issue after updating kernel to 5.4.0-137 Status in linux-meta package in Ubuntu: Confirmed Bug description: Hello, After updating the kernel from 5.4.0-136 to 5.4.0-137 network bridge are not working any more. I can see the bridge with "ip add show" or "brctl show". Network is up and I can reach the full network from the host through the bridge. VM on the host can not reach network or host and host can not reach the VM through the bridge. We have bonded interface used in the bridge and one bridge without IP and one with an IP. DHCP is off on booth bridge. Downgrading the kernel to 5.4.136 (Ubuntu 5.4.0-136.153-generic 5.4.218) seem to work fine. Thank you for your help. Details Description: Ubuntu 20.04.5 LTS Release: 20.04 Not working version => Ubuntu 5.4.0-137.154-generic 5.4.218 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-meta/+bug/2002834/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
