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[ScreenOS] How do I test an Active/Passive NSRP device failover?

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Article ID: KB9810 KB Last Updated: 25 Aug 2020Version: 16.0
Summary:

After performing the steps to configure NSRP, it is recommended to test failover conditions. This article provides the procedure to test failover conditions and confirm that traffic still passes.

Solution:

Use the following procedure to test an NSRP Active/Passive failover. To view the flowchart for this procedure, refer to KB9810 Flowchart .

Note: In this article, Firewall-A refers to the device that is initially configured as the Master device. Firewall-B is the device that is initially configured as the Backup device.

1. Prior to testing NSRP failover, Is Firewall-A passing traffic?

2. Check if the configurations are in sync. Refer to KB26193 - Unable to verify the configuration sync with NSRP peer. 3. Check if the rto mirror synchronisation is enabled. To check this run command 'get nsrp | in run'
  • No, then you can either enable the rto synchronisation by using the command 'set nsrp rto-mirror sync' or manually sync rto objects using command 'exec nsrp sync rto from peer'
  • Yes, go to step 4

4.  Trigger the failover from Firewall-A to Firewall-B.  For more information, consult: KB5885 - Manually forcing a Device from Master to Backup Device  or  KB11192 - How do I perform a device fail over of monitored objects (Interface, Track-IP, and Zone) or

Continue with Step 3

5.  Did Firewall-A failover to Firewall-B?  For information, consult: KB11199 - How to tell if the firewall failed over or changed state.

6. Is Firewall-B passing traffic?  For information on how to tell if the firewall is passing traffic, consult: KB11201 - How to confirm/monitor if traffic is passing through the NSRP device.

7.  Trigger a failover to failback from Firewall-B to Firewall-A, and confirm Firewall-A is passing traffic again. For information on triggering a failover, consult: KB5885 or KB11192.

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