Additional IP - Cannot add an extra IP to my XCP-ng VM :-(
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Cannot add an extra IP to my XCP-ng VM :-(

CH
Von
Crazy Horse
Erstellungsdatum 2024-12-26 15:23:04 (edited on 2024-12-27 08:23:23) in Additional IP

I have a VM under XCP-ng who's working fine for quiet some years.

I would like to add an extra IP address to my VM on a different ETH interface (eth1).

I did follow the reco from the help files from OVH and it's not working.

I can ping my new IP from with my VM but not from the outside.

extra MAC addr has been allocated correctly in XCP-ng console to existing VM on a the correct ETH (eth1)...

My setting are OK IMHO ...

I use the same route than the GW route from the eth0 so eth1 goes to route (GW) of eth0


Whart am I missing ?
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1 Antwort ( Latest reply on 2024-12-31 07:20:36 Von
XeRGy
)

Hey @Crazy Horse 

If the eth1 interface is connected to a bridge in XCP-ng, it might not be properly configured to route traffic from the additional IP.

As a possible solution:
Verify that the bridge associated with eth1 allows traffic to the external network and that the NAT rules (if applicable) are correct.

Additionally, you may have Incorrect ARP Proxy or MAC:

  • OVH requires that each additional IP has a specific virtual MAC address associated with it. This must be configured in both OVH (in the client panel) and XCP-ng for the eth1 interface.
  • In addition, the VM must configure an ARP proxy to respond to ARP requests from additional IPs.

Let me know how it goes,
Sergio Turpín
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