04-10-2013 08:01 AM - edited 03-16-2019 04:43 PM
Hi all, I'm doing a desing.
We have two networks, with one CUCM Cluster in each network, these networks are of different customer.
We have some duplicate subnet ip phones, we suggest install a CUBE between the two networks, with the purpose to make address hiding between the two networks. Signaling between Network 1 and Network 2, there is a CUBE#1.
NETWORK 1
CUCM#1: 172.31.1.1
IP Phone A Subnet #1: 172.31.2.0/24
IP Phone B Subnet #2: 172.31.3.0/24
CUBE #1 IP: 172.31.100.1/24
NETWORK 2
CUCM#2: 172.16.1.1
IP Phone C Subnet #1: 172.16.2.0/24
IP Phone D Subnet #2: 172.31.3.0/24
CUBE #1 IP: 172.16.100.1/24
But, now I'm looking at, I doubt arise.
In a call between, Phone B and Phone D.
IP Phone B signaling with CUCM#1
CUCM#1 Signaling with CUBE#1, CUCM#1 through the SDP, tell the CUBE, send RTP to 172.31.3.x/24
CUBE#1 Signaling with CUCM#2
CUCM#2 Signaling with IP Phone D
CUCM#2 through the SDP, tell the CUBE, send RTP to 172.31.3.x/24
Because the CUBE is a router, and this CUBE knows the network 172.31.3.0/24 towards the Network#1.
I think, we will have One Way Audio Problems.
Am I correcto ?
Is there any way to solve it ?
04-10-2013 08:43 AM
How are the 2 environments integrated? If these are separate networks there should be no direct connection unless you are doing some of NAT via ASA/etc between the 2 networks. Is this IME deployment? How are the 2 customers to be integrated and for what purpose?
Chris
04-11-2013 05:45 AM
NAT (Address Hiding) is the purpose of the CUBE as I have understood.
That is a SIP deployment.
My 2 customers, were two independent companies, but now merged, coincided certain subnet are duplicated.
An interclulster trunk maybe fail, because are subnets duplicated, thus I think a CUBE with SIP Trk is the solution.
With two CUBEs, I think that I have solved the trouble, because at Level Layer 3.
CUBE#1
Routing - One static default route to network #1
Routing - One static specific route to CUBE #2
CUBE#2
Routing - One static default route to network#2
Routing - One static specific route to CUBE #1
But, how can I solve this with a single CUBE ? Since I can only have a route to certain subnet.
I know that, a SBC ACME can solve this issue, since the SBC ACME use realms, but Cisco is best option for the number of sessiones that I will have.
04-13-2013 11:17 AM
CUBE cannot resolve overlapping adddreses.
You will have to renumber, or use cumbersome NAT.
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