We have recently been made aware of an issue with the network infrastructure used by older Link Tunnels that can result in them occasionally entering a state where all associated connections time out until manual intervention is taken. The fix for this issue is to preemptively migrate those tunnels to the newer version of that network infrastructure which is not susceptible to this problem before it happens. The upgrade will require taking each affected tunnel offline for roughly 4-6 minutes. Although it may take several hours to complete the upgrade across all affected tunnels, the impact to any given workspace is expected to be short.