As part of my initial KVM host on C8 deployment, I decided to set up some HA features on the new host, specifically NIC teaming. Teaming seems to be bond++ of a sort, so I thought I would at least try it. So here's the scenario:
1.) Server with two gigabit ethernet ports, two Cisco switches.
2.) During install, used the 'Server with GUI' group and added the virtualization packages.
3.) During install, set up team0 to include the two gig-e ports set up active-backup (two switches).
4.) During install, set up three bridges, with the slave devices being VLANs pointed to the team0 subinterfaces (using VLANs 68, 101, and 302; 101 is to be the management bridge for the host, with guests on all three VLANs). So, for instance, bridge101 has a slave that is VLAN101 that points to team0.101 with a VLAN ID of 101. The bridge101 interface has a manual IP address, but bridge68 and bridge302 do not (IPv4 disabled; IPv6 Ignore)
5.) After reboot, the bridge101 interface comes up, and I successfully connect to the host, since the install is 8.1.1911, I ran a 'dnf update' up to 8.2.2004, which went well, then I successfully set up and used cockpit, cockpit-bridge, cockpit-machines, again over the IP address on bridge101.
Ok, now that the base connectivity is working:
1.) Connect to the host (traffic on bridge101 over team0.101) using virt-manager on my laptop and install a C8 guest, with the network pointed to bridge302, and a manual IP address.
2.) After reboot of guest, there is no IP connectivity to the guest's gateway on VLAN302.
3.) HOWEVER, the gateway's MAC address shows up in the host's bridge fdb for VLAN302, AND in the arp output for the guest; ALSO, the MAC address for the guest shows on the cisco switch 'show mac-address-table' output. The output of 'ip --br link' looks normal for this configuration, but there's a disconnect somewhere. So, since I see that VLAN101 is passing traffic to the bridge correctly (since the management IP is on that VLAN), I try to set up a guest on VLAN101; no dice, no work, but the management IP still works fine.
So, does anyone here have a working setup with KVM guests connecting to bridges using 802.1q VLANs on top of a team? Or even on top of a bond (I can reinstall and set it up as a bond easily enough, using active-backup, as far as I know; and, yes, I would reinstall the host from scratch to do this).