Tunnel Health Checks

Starting in software version 5.3, there are tunnel health checks. The reachability of tunnel destinations is checked and, if the destinations are not reachable, packets will not be sent or will stop being sent.

The tunnel health check on the GigaSMART card defines destinations as follows:

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IP destinations used for sending packets from a single IP interface with tool port to a single IP destination

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tunnel endpoints used for load balancing from a single IP interface with tool port to multiple IP destinations

An SNMP notification can be sent when the status of a tunnel destination or tunnel endpoint changes, either from Up to Down or from Down to Up. Options on the clear command are also added for clearing the destination statistics.