Hey, same here.
lspci | grep Eth
03:05.0 Ethernet controller: D-Link System Inc DGE-528T Gigabit Ethernet Adapter (rev 10)
03:06.0 Ethernet controller: D-Link System Inc DGE-528T Gigabit Ethernet Adapter (rev 10)
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)
bridge name bridge id STP enabled interfaces
vlan1br 8000.20cf30287f58 no eth0
vlan2br 8000.00265abf9583 no eth1
vlan5br 8000.20cf30287f58 no eth0.5
eth0 is the onboard-card (RTL8111/8168B...)
DomU1 works well with bridged networking (vnet0 + vnet1)
DomU2 works well with vnet2. vnet3 has a public ip (doesn't matter) and doesn't work
lsmod | grep r81
r8169 28669 0
mii 3210 1 r8169
When i turn STP on for vlan1br and start the DomU, i can ping it until the "topology change timer" from brctl showstp stops at zero.
So whats wrong there?