I am not really familar with Cisco 1800 series router, especially the natting part.
I have a customer with a voice and office vlan and a ipvpn to a different branch office. The ipvpn router (managed by Vodafone) connects the two sites and is gateway for both vlans.
There is also an internet router for internet connectivity. On that router there is vpn configured, vpn clients can only reach the office vlan.
I have to give a vpn host connectivity to voice vlan and since the vpn subnet is not known on the vodafone router I want to use NAT.
How do I configure vpn traffic to the voice vlan, to be natted first to the office vlan interface of the internet router so that the voice server can send traffic back to the vpn client?
I have attached a simple drawing that hopefully clearifies the situation.
Any help is really appreciated!