You can monitor tunnel count with thresholds that provide warning or critical states which indicate potential issues prior to impacting services.

The following table lists the threshold values of tunnel count and recommended actions.

Threshold State Threshold Value Recommended Corrective Action
Warning/Critical Gateway with 16G Memory
  1. If tunnel count crosses warning or critical threshold:
    1. Collect diagnostic bundle.
    2. Check the stale tunnel count thresholds and perform corresponding actions listed for stale tunnels.
    3. If stale tunnels are within the warning threshold, it is recommended to quiesce the Gateway, add new Gateway to same Gateway pool and load balance the new Edge connections to another Gateway.
    4. If memory usage crosses critical threshold, restart services on Gateway.
  2. If stale tunnels are observed beyond critical threshold:
    1. Collect core dump and diagnostic bundle.
    2. Restart the services on Gateway.
    3. Open a support case with VMware.
With Certificate Without Certificate
3000 (4 Core: 3000) 4500 (4 Core: 3000)
Gateway with 32G Memory
With Certificate Without Certificate
6000 (4 Core: NA) 6000 (4 Core: NA)

The following table lists the threshold values of stale tunnel count and recommended actions.

Threshold State Threshold Value Recommended Corrective Action
Warning 10% of total tunnel count for a duration of 300 seconds
  1. If stale tunnel count crosses warning or critical threshold, collect diagnostic bundle.
  2. If stale tunnel count crosses critical threshold, open a support case with VMware.
Critical 25% of total tunnel count for a duration of 300 seconds