Layer 2 Tunneling Protocol Version 3 (L2TPv3) Notes
Layer 2 Tunneling Protocol Version 3 (L2TPv3)
– Uses IP protocol 115 to connect
-> During the troubleshooting portion of the lab, look for ACLs that deny this protocol
– Router-id used to connect must be specified manually
-> source router-id
– Encapsulation is L2TPv3
-> No LPD / MPLS is required in the core
R1(config)# pseudowire-class ABC
encapsulation l2tpv3
ip local interface lo0
int s0/1
encap ppp
xconnect 3.3.3.3 100 pw-class ABC
AToM
– XR routers
-> Ethernet
int g0/0/0/0
no ipv4 add
l2transport
root
l2vpn
pw-class ABC
encapsulation mpls
xconnect group GROUP1
p2p R1-to-R3
int g0/0/0/0
neighbor 3.3.3.3 pw-id 100 pw-class ABC
Frame-relay
int pos0/0/0/0.100 point-to-point
-> .100 = subinterface
pvc 100
l2vpn
pw-class ABC
encapsulation mpls
xconnect group GROUP1
p2p R1-to-R3
int pos0/0/0/0.100
neighbor 3.3.3.3 pw-id 100 pw-class ABC
L2TPv3
– XR routers
int g0/0/0/0
no ipv4 add
l2transport
l2vpn
pw-class ABC
encapsulation l2tpv3
protocol l2tpv3
ipv4 source 1.1.1.1
xconnect group GROUP1
p2p R1-to-R3
int g0/0/0/0
neighbor 3.3.3.3 pw-id 100 pw-class ABC
