[cisco-voip] One CM and several identical networks

[ash AD]

Andrius,
  
I have to echo what Ryan wrote. We tried to implement the second interface on the MCS server and killed our CCM (CCM 3.3(4)) in Iraq. Is there a reason you couldn't use more private address space i.e..:
   
  Site 1 Voice Net/VLAN: 192.168.0.0/24
  Site 2 Voice Net/VLAN: 192.168.1.0/24
  Site 3 Voice Net/VLAN: 192.168.2.0/24
   
  I know this is much like a private VLAN approach but, it seems simple and heck, the IPs are free. 
   
  V/R,
  PETER CASANAVE
  WAN / VoIP Network Engineer
  U.S. Army
  
Ryan Ratliff <rratliff at cisco.com> wrote:
  Your CM server should never have multiple IP addresses. I've 
certainly no experience deploying IPT but it sounds to me like NAT 
with skinny/H.323 fixup is what you need.

Did I mention to absolutely NEVER put multiple IP addresses on your 
CM? Well, at least if you want it to work...

-Ryan

On Dec 5, 2005, at 1:38 AM, Andrius Kislas wrote:

Hello,

I have a question about CallManager working as a SCCP signaling provider
for several networks using VPN over Internet. It so happens that two
networks are with the same IP adresses (192.168.0.x/24). What is the
"best practice" in such situation for CM to distinguish these networks?
I thought about two solutions:

1) Put a secondary IP address on CM for the second identical network.
Then the make policy routing on a router, so that packets FROM one CM
address goes to the first network, and packets FROM the second address
goes to the second network.

2) Configure NAT on VPN tunnels, so that packets from first network
reaches CM as one IP address and packets from second networks reaches CM
with second address.

I haven't tried neither of these solutions. Maybe there is more
intelligent way of solving the problem?

Andrius
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