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Troubleshooting NetScaler by Raghu Varma Tirumalaraju

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Troubleshooting HA Failovers

HA Failover-related issues are generally considered to be very serious. There are broadly of four types:

  • HA node state issues
  • Heartbeats not being seen
  • New primary not handling traffic
  • Sync and propagation issues

Let's take a look at these one by one.

HA Node state issues

Sometimes when you do a show node, you might see the status Not UP. This means the node is not ready to process traffic, if it were to become primary. This can be because of the following reasons:

  • Critical interfaces are down
  • The SSL card is down
  • High Availability is disabled (on the remote node)
  • The unit is still booting up or rebooting

There is a very handy list of the various node states and what they mean in article CTX118519. I sourced the following tables ...

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