EVPN - Multipoint Segment Routing

[Tom Sverre Pedersen]

Hello, I'm trying to configure EVPN for L2VPN traffic. I already have SR-MPLS basic configure with ISIS and BGP. 

I want to make a L2VPN from my distribution switches using EVPN. I have two Core switches (ASR 9903), they are setup with:

• ISIS
• Segment Routing MPLS
• BGP (Route Reflector)
• BNG

I have read a lot around EVPN and SR. Many of the examples are showing advanced MPLS TE stuff, what I want now is just to get a EVPN Multipoint up and running and then later play with SR MPLS-TE. Can some one show me some configuration examples? 

/Tom

[AnthonySylvester]

Check this out for point to point EVPN 

Check this out for point to multi-point EVPN 

Here is a VPWS example:

CE23 - PE3 - <P network> - PE4 - CE24

PE3 connects to CE23 using G0/0/0/2 and the L2VPN will use G0/0/0/2.100 l2transport  (the same is configured for PE4 to CE24)

RP/0/0/CPU0:PE3#sh run int g0/0/0/2.100
Tue Mar 22 17:37:40.486 UTC
interface GigabitEthernet0/0/0/2.100 l2transport
 description To L2VPN_CE23
 dot1q vlan 100
!
RP/0/0/CPU0:PE3#sh run l2vpn
Tue Mar 22 17:37:55.955 UTC
l2vpn
 pw-class EoMPLS-PWCLASS
  encapsulation mpls
  !
 !
 xconnect group XCONNECT_GROUP
  p2p CE24
   interface GigabitEthernet0/0/0/2.100
   neighbor ipv4 1.1.1.14 pw-id 1234
    pw-class EoMPLS-PWCLASS
   !
  !
 !
!
RP/0/0/CPU0:PE3#

RP/0/0/CPU0:PE4#sh run int g0/0/0/2.100
Tue Mar 22 17:39:57.277 UTC
interface GigabitEthernet0/0/0/2.100 l2transport
 description To L2VPN_CE24
 dot1q vlan 100
!
RP/0/0/CPU0:PE4#sh run l2vpn
Tue Mar 22 17:40:14.115 UTC
l2vpn
 pw-class EoMPLS-PWCLASS
  encapsulation mpls
  !
 !
 xconnect group XCONNECT_GROUP
  p2p CE23
   interface GigabitEthernet0/0/0/2.100
   neighbor ipv4 1.1.1.13 pw-id 1234
    pw-class EoMPLS-PWCLASS
   !
  !
 !
!
RP/0/0/CPU0:PE4#

Here is how you can verify that your L2VPN is up:

RP/0/0/CPU0:PE3#sh l2vpn xconnect 
Tue Mar 22 17:44:34.428 UTC
Legend: ST = State, UP = Up, DN = Down, AD = Admin Down, UR = Unresolved,
        SB = Standby, SR = Standby Ready, (PP) = Partially Programmed

XConnect                   Segment 1                       Segment 2                
Group      Name       ST   Description            ST       Description            ST    
------------------------   -----------------------------   -----------------------------
XCONNECT_GROUP
           CE24       UP   Gi0/0/0/2.100          UP       1.1.1.14        1234   UP    
----------------------------------------------------------------------------------------
RP/0/0/CPU0:PE3#

RP/0/0/CPU0:PE4#sh l2vpn xconnect 
Tue Mar 22 17:45:01.446 UTC
Legend: ST = State, UP = Up, DN = Down, AD = Admin Down, UR = Unresolved,
        SB = Standby, SR = Standby Ready, (PP) = Partially Programmed

XConnect                   Segment 1                       Segment 2                
Group      Name       ST   Description            ST       Description            ST    
------------------------   -----------------------------   -----------------------------
XCONNECT_GROUP
           CE23       UP   Gi0/0/0/2.100          UP       1.1.1.13        1234   UP    
----------------------------------------------------------------------------------------
RP/0/0/CPU0:PE4#

Let me know if this helps!

-Anthony Sylvester