Nortel Networks 4050 manual Monitoring switch health using the Srem, Click Delete Switch SSH Key

Chapter 3 Managing the network access devices 111

The switch SSH Key screen appears (see Figure 14 on page 109).

2Click Delete Switch SSH Key.

3Click Apply on the toolbar to send the current changes to the Nortel

SNAS 4050. Click Commit on the toolbar to save the changes permanently.

4Click Import SSH from Switch.

5Click Apply on the toolbar to send the current changes to the Nortel

SNAS 4050. Click Commit on the toolbar to save the changes permanently.

For more information about the SSH Key commands, see “Managing SSH keys for Nortel SNA communication using the SREM” on page 109.

Monitoring switch health using the SREM

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 parameters for the Nortel SNAS 4050 health checks, complete the following steps:

1Select the Secure Access Domain > domain > Switches > switch > Health Check tab.

Nortel Secure Network Access Switch 4050 User Guide