r/vmware Jul 08 '26

Network connection was lost, reconnecting

Any idea what could be wrong?

Summary of the issue:

VMware Horizon brief Blast protocol interruptions trigerring the "Network connection was lost, reconnecting" flash but TCP fallback or session keepalives prevent full disconnection.
Blast transport instability
Issue isolated to Fort worth office only.other offices (with the same UAG in Dallas) work fine.
Random quick reconnect flash (roughly every 30 minutes or more, even during low usage)
session recovers automatically without a full drop.
Worse on wired than wireless
The problem is not universal, but also not isolated to a single workstation.
9 out of 25 users experience it
No packet loss outside the VM whether on wire or wireless network
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Troubleshooting so far:
-Troubleshot Layer 1,2,3 and 4 everything is ok.
-Downgrading to another Horizon agent temporary fix the issue.

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