Panasonic NN46240-501 - Manual (Page 38)

1 Product overview
Nortel Secure Router 8000 Series
Configuration Guide - Basic Configuration
Graceful Restart
Graceful Restart (GR) is a key technology for providing HA. Network administrators or faults
can trigger GR. GR due to network faults does not delete the routing information in the
routing or forwarding table or reset the LPU, so services are not interrupted.
The Secure Router 8000 Series supports system-based GR and protocol-based GR.
Protocol-based GR includes the following:
• BGP GR
• OSPF GR
• IS-IS GR
• MPLS LDP GR
• L3 VPN GR
1.3.5 Interfaces
The Secure Router 8000 Series supports the following rich interface types:
• Physical interface (the LAN interface and the WAN interface). The Secure Router 8000
Series supports the following physical interfaces:
- Ethernet interface
- POS interface
- CPOS interface
- ATM interface
- E1/CE1/CT1/CE3
• Logical interface (not physical, but configured to perform data exchange). The Secure
Router 8000 Series supports the following logical interfaces:
- subinterface
- virtual Ethernet interface
- loopback interface
- null interface
- tunnel interface
1.3.6 Link layer protocols
The Secure Router 8000 Series supports link layer protocols, including PPP, HDLC, ATM, IP
over ATM, 1483B, RPR, RRPP, and FR.
The Secure Router 8000 Series supports the following:
• the VLAN function under the IEEE 802.1Q specification
• IP packet forwarding between different VLANs
• intercommunication with the devices of third-party vendors
• data forwarding between several VLANs on a single physical Ethernet interface by
creating subinterfaces (each of which acts as an independent Ethernet interface) for each
Ethernet interface, which saves interface resources
1.3.7 IP services
This section describes the IP services supported by the Secure Router 8000 Series.
1-12 Nortel Networks Inc. Issue 5.3 (15 January 2009)