Figure 5-10 Vpn Network - NEC Univerge SV9100 Manual

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Figure 5-10 VPN Network

IPLE Signaling Address = 192.168.15.5/24

IPLE DSP = 192.168.15.6/24

SV9100 Networking Manual

Another common feature is the use of the Internet as the WAN between

customer locations. When this is done VPNs are typically used between the

locations. A VPN (Virtual Private Network) is a private data network that

maintains privacy through the use of tunneling protocols and security

features over the public Internet. This allows for remote networks (with

private addresses), residing behind NAT routers and/or firewalls, to

communicate freely with each other. When building the VPN tunnels,

throughout the network, they must be assigned as a fully meshed network.

This means that every network is allowed direct connection to each and

every other network in the topology.

The following diagram shows three sites connected together via VPN. This

network is not fully meshed due to the lack of a VPN tunnel between Sites B

Between Sites A and B

Between Sites A and C

Site A can communicate with phones on sites B and C. Phones on sites B

and C can not communicate with each other.

To correct this issue, another VPN connection between sites B and C is

IPLE Signaling Address = 192.168.15.5/24

IPLE DSP = 192.168.15.6/24

IPLE Signaling Address = 192.168.20.5/24

IPLE DSP = 192.168.20.6/24