Nortel Networks 4050 manual Reimporting the network access device SSH key using the CLI

Chapter 3 Managing the network access devices 89

Reimporting the network access device SSH key using the CLI

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

1Use the /cfg/domain #/switch #/sshkey/del command to delete the original key.

2Enter Apply to apply the change immediately.

3Use the /cfg/domain #/switch #/sshkey/import command to import the new key.

4Enter Apply to apply the change immediately.

For more information about the commands, see “Managing SSH keys for Nortel SNA communication using the CLI” on page 88.

Monitoring switch health using the CLI

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:

/cfg/domain #/switch #/hlthchk

The HealthCheck menu displays.

Nortel Secure Network Access Switch 4050 User Guide