Panasonic NN46240-501 - Manual (Page 41)

Nortel Secure Router 8000 Series
Configuration Guide - Basic Configuration 1 Product overview
• accelerated packet forwarding
• MPLS VPN applications, interworking between various types of VPNs, and networking
applications such as traffic engineering, QoS, and Diff-Serv
The Secure Router 8000 Series MPLS function supports Layer 3 and Layer 2 protocols such
as IP, FR, ATM, and Ethernet. MPLS provides an Operation, Administration and Maintenance
(OAM) mechanism without dependence on the upper or lower layers in the TCP-IP protocol
suite.
The IP Telecommunication Network (IPTN) supported by the Secure Router 8000 Series is
based on IP network technologies. IPTN meets end-to-end QoS, reduces the investment of
carriers, and creates value-added telecommunication network solutions.
1.3.11 VPN services
IP VPN
Layer 2 VPN
This section describes the Virtual Private Network (VPN) services supported by the Secure
Router 8000 Series.
The Generic Routing Encapsulation (GRE) protocol is used to encapsulate packets of certain
network layer protocols (such as IP and IPX packets) so that these packets can be transmitted
in a network running another network layer protocol (such as IP). As a tunnel protocol, GRE
uses the tunnel technology in the protocol layer.
GRE can be used to perform the following functions:
• transmit local multiprotocol network data through the single-protocol backbone network
• extend a network that is limited by hops, such as an IPX network
• connect the separated subnets for a VPN.
• access MPLS VPN through GRE tunnels
The Secure Router 8000 Series provides Layer 2 VPN services based on MPLS. It supports
VPLS, Martini MPLS L2VPN, Kompella MPLS L2VPN, CCC MPLS L2VPN, and SVC
MPLS L2VPN to carry VLL services, and it supports PWE3.
MPLS/BGP Layer 3 VPN
1.3.12 QoS
The Secure Router 8000 Series implements MPLS/BGP Layer 3 VPN and provides carriers
with end-to-end VPN solutions as follows:
• Carrier’s carrier
• Inter-AS VPN
• HoVPN
• RRVPN
This section describes the Secure Router 8000 Series support for Quality of Service (QoS).
Issue 5.3 (30 March 2009) Nortel Networks Inc. 1-15