Nortel Networks Nortel Secure Network Access Switch 4050 Manual do Utilizador descarregar pdf (Página 111)

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Chapter 3 Managing the network access devices 111

Nortel Secure Network Access Switch 4050 User Guide

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

2 Click Delete Switch SSH Key.

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

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

4 Click Import SSH from Switch.

5 Click 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:

1 Select the Secure Access Domain > domain > Switches > switch > Health

Check tab.

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