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Beginner

spanning layer 2 over mpls - xconnect or vfi ?

Hello people, 

I am trying to span layer 2 using mpls, on Cisco ASR920. I have a vlan (vlan 400) coming in on an interface (g0/22) on a Cisco ASR920, and i want to span it over to another ASR920 as layer 2. But............ there are 2 ways i can do this...  Please could someone suggest what the difference in the ASR920 config below is? I don't have a lab and don't want it to fail when trying to put it into production...

 

 

CE1 ----------- PE1 (ASR920)-----------MPLS ----------- PE2 (ASR920) ----------- CE2

                      int g0/22

 

Option 1:

interface pseudowire10
encapsulation mpls
neighbor 2.2.2.2 10

 

l2vpn xconnect context 10
member pseudowire10


interface GigabitEthernet1/0/22
service instance 400 ethernet
encapsulation dot1q 400
rewrite ingress tag pop 1 symmetric
xconnect 10.4.6.6 400 encapsulation mpls

 

Option 2:

l2 vfi 400 manual
vpn id 400
neighbor 2.2.2.2 pw-class vpls400

interface vlan400
no ip address
xconnect vfi 400

bridge-domain 400

interface GigabitEthernet0/22

service instance 400 ethernet
encapsulation dot1q 400
rewrite ingress tag pop 1 symmetric
bridge-domain 400

 

2 REPLIES 2
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Hall of Fame Master

Hello @dinesh2001 ,

option 1 is a point to point L2 service EoMPLS psuedowire

option 2 using VPLS is a point to multipoint service and would allow to add a third site later

 

So what to use really depends on what can be useful on the future.

I

Hope to help

Giuseppe

 

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thank you, I dont plan to use a third site.so i could use either. I guess the simplest config would be the best.... any suggestions on which is the simplest and most reliable.. ie not likely to be affected by bugs?