Panasonic NN46240-501 - Manual (Page 37)

Nortel Secure Router 8000 Series
Configuration Guide - Basic Configuration 1 Product overview
Telnet service
The Secure Router 8000 Series supports the Telnet server and Telnet client services. You can
log on to a specified router port from your PC by running the Telnet client, and then initiate
communication with the device connecting to the asynchronous serial port of the router. You
can use this method to remotely configure and maintain the device.
Secure Shell (SSH) terminal service
Network attacks are usually triggered by the Telnet service that is provided by the server. As
the Telnet protocol does not provide a secure authentication mode, and the data transmitted
over TCP is in plain text, this challenges network security.
The Secure Router 8000 Series provides Secure Shell (SSH) service and supports password,
RSA authentication, DES, and 3DES encryption. SSH features make it possible to implement
secure remote access over nonsecure networks:
• The user name and password for communication between the SSH client and server are
encrypted, which prevents the password from being intercepted.
• The SSH service encrypts the data in transmission to ensure the security and reliability of
the data.
• RSA authentication ensures secure key exchange and a secure session by generating a
public key and a private key according to the encryption principal for asymmetric
encryption systems.
1.3.4 High Availability
The Secure Router 8000 Series ensures the network availability through redundancy of key
modules, High Availability (HA) of Line Processing Units ( LPUs), Fast Reroute (FRR), and
Graceful Restart (GR).
Redundancy of key modules
The Secure Router 8000 Series can work with a single Routing Process Unit ( RPU) or two
RPUs in redundancy. The RPU of the Secure Router 8000 Series supports hot backup.
The Secure Router 8000 Series supports the following two switchover methods:
• automatic switchover
• forcible switchover
The Secure Router 8000 Series supports backup of the management bus and 1+1 backup for
the power module. The LPU, the power module, and the fan modules are hot swappable.
IP/MPLS Fast Reroute
Fast Reroute (FRR) can minimize data loss due to network faults. The switch time can be less
than 50 milliseconds (ms).
The Secure Router 8000 Series provides the following FRR functions:
• IP FRR
• LDP FRR
• TE FRR
• VPN FRR
Issue 5.3 (30 March 2009) Nortel Networks Inc. 1-11