GRE

Generic Routing Encapsulation (GRE) is a protocol designed for performing encapsulation of one network layer protocol over another network layer protocol. GRE configuration involves mainly the following task:

l      Configuring GRE over Ipv4 tunneling

L2TP

The Layer 2 Tunneling Protocol (L2TP) is intended to tunnel PPP packets. L2TP configuration involves mainly the following tasks:

l      Configuring LAC

l      Configuring LNS

L3VPN

L3VPN provides flexible networking modes, excellent scalability, and convenient support for MPLS QoS and MPLS TE. L3VPN configuration involves mainly the following tasks:

l      Configuring VPN instances

l      Configuring basic L3VPN