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scpf
Copper Contributor
Jul 25, 2025

Hyper‑V SET Loop Risk, Asymmetric Paths & Active‑Standby (ALE OXE VM Offline)

Hi everyone,

Environment
- Windows Server 2025 Hyper‑V
- One external virtual switch
- Physical NICs combined with Switch Embedded Teaming (SET)
- One VM: Alcatel‑Lucent Enterprise OmniPCX Enterprise (OXE)

Questions

→ 1) Loop prevention
→ 2) Asymmetric traffic
→ 3) Active‑Standby

Problem
The OXE VM intermittently becomes unreachable (no ICMP, no SIP).  
Hyper‑V shows it as “Running,” CPU is low, guest logs are clean.  
Rebooting the VM or toggling the SET team restores connectivity.

Looking for advice on:
- Loop‑prevention mechanisms in Hyper‑V SET
- How inbound vs outbound flows are balanced
- Whether Active‑Standby is possible and how to configure it
- Diagnostics to confirm if asymmetric paths or loops are causing the outage

Thanks in advance!

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