PWHE MPLS LDP on ASR9000

[Charles Xing]

Hey 

I want to setup mpls ldp on PWHE interface but there is no common for this virtual interface. How should we do in BNG (ASR 9000)?

RP/0/RSP0/CPU0:new-mdr-bng1(config)#mpls ldp
RP/0/RSP0/CPU0:new-mdr-bng1(config-ldp)#interface ?
ATM ATM Network Interface(s) | short name is ATM
BVI Bridge-Group Virtual Interface
Bundle-Ether Aggregated Ethernet interface(s) | short name is BE
Bundle-POS Aggregated POS interface(s) | short name is BP
FastEthernet FastEthernet/IEEE 802.3 interface(s) | short name is Fa
FortyGigE FortyGigabitEthernet/IEEE 802.3 interface(s) | short name is Fo
GigabitEthernet GigabitEthernet/IEEE 802.3 interface(s) | short name is Gi
HundredGigE HundredGigabitEthernet/IEEE 802.3 interface(s) | short name is IMA ATM Network Interface(s) | short name is IMA
Multilink Multilink network interface(s) | short name is Ml
POS Packet over SONET/SDH network interface(s) | short name is POS
SRP SRP interface(s) | short name is SRP
Serial Serial network interface(s) | short name is Se
TenGigE TenGigabitEthernet/IEEE 802.3 interface(s) | short name is Te
tunnel-ip GRE/IPinIP Tunnel Interface(s)
tunnel-ipsec IPSec Tunnel interface(s) | short name is tsec
tunnel-te MPLS Traffic Engineering Tunnel interface(s) | short name is tt

[Aleksandar Vidakovic]

We haven't foreseen this option. Can you explain your use case scenario for LDP over PWHE?

[Charles Xing]

Hey Alex,

Normally, there are no more than two layer VLANs in ISP network. We can terminate in ASR 1001(access router). Matching these 2 VLANs and create BDI interface and set up mpls in this interface.

However, there are three VLANs for some reason sometimes. At that time, we usually match the first one on ASR1001(access) and pop it. then put into l2vpn to ASR9000 match the other 2 VLANs. We need to set up MPLS in all our ISP network which need to create MPLS in this PWHE interface.

Cheers.
Charles

[Aleksandar Vidakovic]

PW-Ether interface is used to terminate services applied to a CPE that is connected through L2VPN MPLS domain. If you want to run LDP on PW-Ether interface (or use any other protocol for label allocation), that LDP session would terminate on the CPE. If that CPE runs LDP, why don't you simply extend the MPLS domain towards the CPE? It would be a much simpler solution.

[Albert Safiullin]

You doesn't need an MPLS on PWHE-interface. You should only configure PWHE as an interface for xconnect(p2p) at ASR9000 to ASR1001.
For example,
l2vpn
xconnect group TEST
p2p TEST
interface PW-EtherXXX
neighbor ipv4 X.X.X.X pw-id XXX

Also, applications such as TE and LDP have checks for interface type and therefore do not allow PWHE to be configured. So PWHE doesn't support MPLS-labeled traffic.