Comparison of LDP VPWS and BGP/MPLS IP VPN

Cost of PEs

The memory cost is low; the consumption of interface resources is high; the signaling cost is high.

The memory cost is high; the consumption of interface resources is low; the signaling cost is low.

Flooding mode of the VPN topology

Manual configuration.

BGP automatic discovery.

Flooding mode of VPN routes

The VPN routes are flooded directly between CEs and converge rapidly.

The VPN routes are flooded by PEs and converge slowly.

Access mode of CEs

CEs with different link encapsulation types can interwork over a heterogeneous LDP VPWS network.

Different sites in the same VPN can have different access modes.

VPN nesting

Not supported.

Supported.

Support for multicast

The protocol cost is low; the forwarding cost is high.

The protocol cost is high; the forwarding cost is low.

Protocol independence

Over any Layer 3 protocol.

Over only IP.

Variety of tunnels

LSPs tunnels are supported.

LSPs and IPsec tunnels are supported.

Inheritance from the traditional VPN

Inherits and improves the traditional L2VPN.

Inherits and improves the traditional L2VPN.

Maturity

Immature.

Mature.

Easy-of-use

Complex.

Simple.

Manageability

Outsourced topology and centralized management.

Outsourced route and role-based management.