dheeraj12347 commented on PR #12860:
URL: https://github.com/apache/cloudstack/pull/12860#issuecomment-4132630392

   > Hi @dheeraj12347 I deploy a new lab on 4.22, upgrade to 4.22 SNAPSHOT. Now 
the router is starting up, and GRE is working, but only if the router and VMs 
are on one node. Ig VM on the node1 and router on the node2 - network not 
working
   > 
   > P.S. Network providers are broken
   
   Hi @UAnton,
   thanks a lot for rebuilding the lab and testing again, it’s really helpful. 
It’s great that the router now starts and GRE works when the router and VMs are 
on the same node. The issues you’re seeing with cross‑node traffic and the 
broken network providers in the screenshot suggest there is more going on in 
the multi‑host GRE/OVS and provider configuration.
   Could you please share a bit more detail on your setup (number of hosts and 
GRE/OVS layout) and a log snippet from the management server around the time 
you test VMs on different nodes (especially any OvsFetchInterfaceCommand / 
UnsupportedAnswer lines)? That will help me look deeper into what might be 
going wrong.


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