ilo unavailable via interlink

Hi

We have two chassis connected via the OA interlink, the second OA is available via the link for most functionality but iLo does not work for the second chassis, I get a timeout waiting for web administration or remote console.

the second chassis is set up with the same default gateway as the first, ive compared all config with our other DC where this setup is working and it appears the same.

Any pointers as to how to get iLo working via the OA interlink?

Thanks

Ferg