VCS Control and VCS Express Integration

[Anju Josua]

Dear All,

Right now, i am deploying VCS control and express. I am using H.323.

My topology as below :

VCS- C (local IP: 10.170.11.43) <-----> VCS - E (local IP: 10.170.10.44 NAT to 1.2.3.4) <----->  Public IP (endpoint)

my call flow from internet to local : call to public ip of expressway then using fallback alias in VCS-E, the call directed to an endpoint registered in VCS control.

In VCS-E, i already configure:

- search rule to VCS-C

- fallback alias to endpoint registered in VCS-C

- Traversal Server

- Static NAT

In VCS-C, i configure

- Traversal client

- Search rule to VCS-E

The signaling process run well (i can call to 1.2.3.4, endpoint in VCS-C ringing), but when i try to pick up, the call automatically disconected.

The reason is "New connection needed".

Did i miss something?

Any suggestion will be appreciated.

Thanks,

Anju Josua

[Chris Swinney]

Hi Anhu,

Do you have the Dual NIC licence on the VCS-E? You will need this (I believe) in this deployment scenario) and you will then set One of the interface to be on the Loacl network and one on the public/external network and allow the VCS-E to apply the NATing.

Chris

[Anju Josua]

Hi Chris,

Yes, i already have that license.

Thx,

Anju

[Anju Josua]

Hi all,

i suspect my nat configuration still miss something.

is there any configuration related h.323 with NAT?

Thx,

Anju

[Chris Swinney]

Hi Anju,

NAT'ing should be done done via the VCS-E from the DMZ to public network (with the dual NIC option), however if there is a further NAT in place between the VCS-C and VCS-E, ensure that this is on a 1:to:1 mapping and the there are no additional H.323 Application Layer Gateways (ALG) running on the device between the VCS-C and VCS-E.

To test, you could place an endpoint logicically in the DMZ and register directly to the VCS-E (thus by passing the VCS-C). Does this call out correctly.

If not, then you may need to post of more deployment info such as a diagram or log capture, search results etc.

Chris