MPLS SVI Question

[WimVS]

Hey,

I have following simple setup:

R1--------R2 with a trunk link in between. Connected on e0/0 (both sides)

Following config on R1:

interface Vlan1
 ip address 10.10.10.1 255.255.255.252
 mpls ip
!

!
interface Ethernet0/0
 switchport trunk encapsulation dot1q
 switchport mode trunk
 duplex auto
!

Same config on R2 but with ip 10.10.10.2.

Problem I encounter is they are not forming an ldp session. Maybe not possible?

show mpls ldp discovery:

Local LDP Identifier:
10.10.10.1:0
Discovery Sources:
Interfaces:
Vlan1 (ldp): xmit

show mpls interfaces

Interface IP Tunnel BGP Static Operational
Vlan1 Yes (ldp) No No No Yes

Any suggestions are welcome.

Thanks.

[Georg Pauwen · Accepted solution]

Hello,

the general guideline is that MPLS is a layer 3 connection, and an 802.1Q trunk is a layer 2 protocol, so you cannot have an 802.1Q trunk across a MPLS connection. You need something like 802.1Q tunneling to expand your VLAN.

[WimVS]

Thanks, I'll look into that.