86System information
Figure 19
VPN design over a Layer 3 network
ATTENTION
If the WLAN IP Telephony Manager 2245 is not in the same subnet as the handsets, the handsets do not work.
ATTENTION
In Figure 18 "VPN design over a Layer 2 network" (page 85), Figure 19 "VPN design over a Layer 3 network" (page 86), Figure 20 "Not recommended VoWLAN design" (page 87), and Figure 21 "Network configuration 3 with Full DHCP Server" (page 89), the clouds can represent a corporate intranet or the public Internet.
Make the VPN Router public interface the default gateway for the handsets, and if not the direct gateway for clients, at least ensure that traffic comes from the WLAN into the public interface, not the private interface.
Connect the private interface of the VPN Router to the trusted side of the network. Make sure that client DHCP traffic flows through the VPN Router. If a network path around the VPN Router exists for the handsets to get
Nortel Communication Server 1000
WLAN IP Telephony Installation and Commissioning
Release 5.0 15 June 2007
