I am testing a setup that I have an L2TPv3 tunnel between two routers and the pseudowires are configured on the dot1q sub-interfaces.
1. It is working with both ends use the same VLAN number (which is 2 in my virl lab)
2. It is working with both ends using the different VLAN number (2 on the left side and 22 on the right side). The switch would complain about the inconsistent VLAN in the STP errors, but with bpdufilter enabled, the ping will work.
3. It is not working with the different VLAN numbers and both VLAN numbers are configured as the "Native VLAN" on each side.
My topology is like
sw1 Gi0/1 ---(trunk)--- Gi0/3 rt1 --- rt3 Gi0/3 ---(trunk)--- sw2 Gi0/1
Here is my config
sw1:
interface GigabitEthernet0/1
switchport trunk encapsulation dot1q
switchport trunk native vlan 2
switchport mode trunk
!
interface Vlan2
ip address 2.2.2.1 255.255.255.0
!
rt1:
pseudowire-class psw
encapsulation l2tpv3
ip local interface Loopback0
!
interface GigabitEthernet0/3.2
encapsulation dot1Q 2 native
no cdp enable
xconnect 192.168.0.3 2 encapsulation l2tpv3 pw-class psw
end
! 192.168.0.3 is rt3's loopback IP
rt3:
pseudowire-class psw
encapsulation l2tpv3
ip local interface Loopback0
!
interface GigabitEthernet0/3.22
encapsulation dot1Q 22 native
no cdp enable
xconnect 192.168.0.1 2 encapsulation l2tpv3 pw-class psw
! 192.168.0.1 is the rt1's loopback
sw2:
interface GigabitEthernet0/1
switchport trunk encapsulation dot1q
switchport trunk native vlan 22
switchport mode trunk
!
interface Vlan22
ip address 2.2.2.2 255.255.255.0
The pseudowire is up on both ends
rt1:
iosv-1#sh xconnect interface g0/3.2 detail
Legend: XC ST=Xconnect State S1=Segment1 State S2=Segment2 State
UP=Up DN=Down AD=Admin Down IA=Inactive
SB=Standby HS=Hot Standby RV=Recovering NH=No Hardware
XC ST Segment 1 S1 Segment 2 S2
------+---------------------------------+--+---------------------------------+--
UP pri ac Gi0/3.2:2(Eth VLAN) UP l2tp 192.168.0.3:2 UP
Interworking: vlan Session ID: 3656408470
Tunnel ID: 3142981728
Protocol State: UP
Remote Circuit State: UP
pw-class: pswrt2:
iosv-3#sh xconnect interface g0/3.22 detail
Legend: XC ST=Xconnect State S1=Segment1 State S2=Segment2 State
UP=Up DN=Down AD=Admin Down IA=Inactive
SB=Standby HS=Hot Standby RV=Recovering NH=No Hardware
XC ST Segment 1 S1 Segment 2 S2
------+---------------------------------+--+---------------------------------+--
UP pri ac Gi0/3.22:22(Eth VLAN) UP l2tp 192.168.0.1:2 UP
Interworking: vlan Session ID: 687488009
Tunnel ID: 1088534909
Protocol State: UP
Remote Circuit State: UP
pw-class: pswHowever, the ping between switch 1 and 2 between their vlan IPs are not working. The STP packets are not received on either end too... Is there a limitation with this setup? Thanks
