2/08/2019

Arista MPLS VPN Step by Step (2b) L2VPN - Type 5 PW

This blog covers type 5 pw configuration. Here is the topology:



Configuration-wise, type 5 is simpler than type 4. And between 2 CEs, it is just a like direct ethernet link. From above topology, there is 2 vlans between CEs over 1 pw. 

PE1 Configuration:

mpls ldp
   router-id 88.255.11.11
   transport-address interface Loopback88
   fec filter prefix-list fec-pfx-list
   no shutdown
   !
   pseudowires
      pseudowire to-ce2-type5-pw
         neighbor 88.255.22.22
         pseudowire-id 303
         mtu 9082
!
patch panel
   patch ce1-ce2-pw5-1
      connector 1 interface Ethernet47/3
      connector 2 pseudowire ldp to-ce2-type5-pw
!
interface Ethernet47/3
   description mpls.ldp5pw.pe1=>ce1.et51/3
   !! PE to CE interface MUST be routed port !!
   no switchport

L2 Control Packets

One different between type4 and 5 is the forwarding behavior of L2 control packets. From above link, the LLDP is forwarded. So "show lldp neighbor" on CE1 shows CE2, not PE1

CE1(config)#ln
Et51/1     PE1                              Ethernet47/1               120
Et51/2     PE1                              Ethernet47/2               120
Et51/3     PE1                              Ethernet47/3               120
Et51/3     CE2                              Ethernet52/3               120

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