[c-nsp] ASR901 EoMPLS Customer COS bits trashed

[Caillin Bathern]

Hi list,

 

I am seeing some odd behaviour in the lab and I am wondering if anyone
else knows why this is happening or any alternative...

 

I have a simple setup - CE---PE(ASR901)---EoMPLS---PE(ASR901)---CE - I
also have inline packet capturing devices on all physical links and MPLS
explicit null turned on to ensure EXP marking is carried through.

A single VLAN (10) in a service instance is been xconnected through on
the ASR901s as follows:

 

pseudowire-class eth

encapsulation mpls

interworking ethernet

!

interface GigabitEthernet0/1

service instance 10 ethernet

  encapsulation dot1q 10

  xconnect 6.6.6.6 10 encapsulation mpls pw-class eth

!

 

The CE is a network tester sending VID10 with COS 3, this traffic is
received on the remote CE however my COS 3 marking is lost...

This behaviour is consistent with tag pop/no tag pop, Ethernet or VLAN
interworking, service policies or no service policies.

 

Why are my customer COS markings being destroyed by the ASR901 when
within an EoMPLS circuit and is there a way to fix this?

 

Cheers,

Caillin