Nortel Networks 4050 User Manual

Chapter 3 Managing the network access devices 89

Nortel Secure Network Access Switch 4050 User Guide

 

Whenever the network access device generates a new public SSH key, you must 
import the new key into the Nortel SNAS 4050 domain.

Use the 

 command to delete the 

original key.

Enter 

 to apply the change immediately.

Use the 

 command to import 

the new key.

Enter 

 to apply the change immediately.

For more information about the commands, see 

The Nortel SNAS 4050 continually monitors the health of the network access 
devices. At specified intervals, a health check daemon sends queries and 
responses to the switch as a heartbeat mechanism. If no activity (heartbeat) is 
detected, the daemon will retry the health check for a specified number of times 
(the dead count). If there is still no heartbeat, then after a further interval (the 
status-quo interval) the network access device moves all its clients into the Red 
VLAN. When connectivity is re-established, the Nortel SNAS 4050 synchronizes 
sessions with the network access device.

The health check interval, dead count, and status-quo interval are configurable.

To configure the interval and dead count parameters for the Nortel SNAS 4050 
health checks and status-quo mode, use the following command:

The HealthCheck menu displays.