2 VPN's running on 1 VS

[mac123]

Hi

Has anybody out there configured 2 VPN's to run on the same external VS. Peer 1 runs VSX NGX peer 2 runs checkpoint NGX on nokia

I.e VPN 1 main VS ip address 193.1.1.2

VPN 2 which is an interface off the VS 10.1.1.2

VPN 1 works fine but VPN 2 from VSX NGX to another Nokia running checkpoint has intermittent problems with paylod malformed.

All encryption parameters and shared secret are fine.

I think the other end is getting confused due to the main ip address of the VS being different to the peer address on VPN 2. On VSX NGX there is no link selection so i cant force the tunnel on VPN2 down an interface.

Can anybody help or advise before i start to create another seperate VS for VPN2

MAny thanks in advance

MAc