WAN Links shown as down in VCO
Article ID: 368142
Updated On:
Products
Issue/Introduction
A customer may observe that the WAN links on a VMware SD-WAN Edge are intermittently showing as down and then up on the Monitoring and Events page of the VMware SASE Orchestrator UI, with the potential the Edge may become unresponsive and fail to pass traffic until it is manually rebooted, or the Edge can experience a Dataplane Service failure and restart.
Symptoms-
A. An edge can become unresponsive and unreachable through the Orchestrator, which requires an on-site reboot/power cycle.
B. An edge can trigger an Edge service failure with a core file generated, with the Edge restarting to recover.
Environment
Edge software version 451 or lower versions
Cause
This is an Edge memory leak issue encountered when the Edge Dataplane Service cannot open shared memory, causing stale PIs. This in turn causes open file descriptor exhaustion which will initially impact WAN links
Resolution
This issue is caused by known software issue #125421
This defect is fixed in 4.5.2.2, 5.2.2, 5.4
For more information please see VMware SD-WAN Software Upgrade FAQs
Additional Information
Workaround -
If first observing this issue, schedule an Edge service restart in a maintenance window before the problem worsens
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