Hello,
We encountered the problem of transmitting BDPUs through the L2TPv3 tunnel.
Two L2TPv3 tunnels (wireless link and 4G connection) are set up between AR1200 routers at the two sites. We want to use the spanning tree protocol to automatically disable one of the tunnel ports to implement redundancy. However, no BPDU traffic passes through the tunnel. We have added the l2protocol-tunnel stp enable command on the tunnel termination interface but nothing changed.
We don't know how to proceed with the problem. Can you give us some advice? Thank you!
The key configurations of one router are as follows (peer router is similar to this):
#
interface Vlanif101
ip address 10.1.1.254 255.255.255.0
l2protocol-tunnel stp enable
#
interface Vlanif102
ip address 192.168.10.1 255.255.255.252
link-bridge Tunnel0/0/2 tagged
l2protocol-tunnel stp enable
#
interface GigabitEthernet0/0/0
port link-type access
port default vlan 101
#
interface GigabitEthernet0/0/1
port link-type access
port default vlan 102
#
interface GigabitEthernet0/0/7
ip address 10.1.2.1 255.255.255.252
l2protocol-tunnel stp enable
#
interface GigabitEthernet0/0/8
ip address 172.16.10.2 255.255.0.0
link-bridge Tunnel0/0/1 tagged
l2protocol-tunnel stp enable
#
interface Tunnel0/0/1
tunnel-protocol svpn
encapsulation l2tpv3
l2tpv3 local session-id 1
l2tpv3 remote session-id 4
l2tpv3 local cookie length 4 plain lower-value 11
l2tpv3 remote cookie length 4 plain lower-value 22
tunnel-source 10.1.2.1
tunnel-destination 10.1.2.2
#
interface Tunnel0/0/2
tunnel-protocol svpn
encapsulation l2tpv3
l2tpv3 local session-id 10
l2tpv3 remote session-id 14
l2tpv3 local cookie length 4 plain lower-value 11
l2tpv3 remote cookie length 4 plain lower-value 22
tunnel-source 10.1.1.254
tunnel-destination XX.XX.XX.XX
#
ip route-static XX.XX.XX.XX 255.255.255.255 10.1.1.1
#
