EVC vs Pseudowire

[taburley]

omghee I'm not quite sure why I can't figure out the difference and if there is a difference besides the obvious trunk vs sub interface.  I have limited experience and am trying to get my head around the EVC.  Been around for quite some time apparently and becoming a pretty hot item in the Cisco testing arena.  Thanks!

EVC:

int g0/1

  switchport trunk allowed none

  switchport mode trunk

  service instance 3 ethernet

     encap dot1q 3

     xconnect 192.168.1.1 3 encap mpls

ip route 192.168.1.1 255.255.255.255 172.16.16.2

Pseudowire:

int g 0/1.3

  encap dot 3

  xconnect 192.168.1.1 3 encap mpls

ip route 192.168.1.1 255.255.255.255 172.16.16.2

[Masoud Pourshabanian]

Hello,

Your first configuration.

Trunk interface can carry several different tags so you need to classifiy ingress traffic based on the tags.

  service instance 3 ethernet

     encap dot1q 3

The command above is a classification for VLAN 3. Yoy may do classification for other tags as well. You are missing one command which pops a tag.

rewrite ingress tag pop 1 symmetric

Second configuration is for subinterface. On subinterface, you do need to do classification, because you have different subinterfaces for different VLAN, so classification is already done on the specific sub interface.

Hope it helps,

Masoud