Avaya Communication Server 1000 Installation And Commissioning Manual page 94

System information
Figure 20: VPN design over a Layer 3 network
Important:
If the WLAN IP Telephony Manager 2245 is not in the same subnet as the handsets, the
handsets do not work.
Important:
In Figure 19: VPN design over a Layer 2 network
a Layer 3 network
and Figure 22: Network configuration 3 with Full DHCP Server
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 DHCP assignments, the routing requirements on the VPN Router
become much more complicated. To support such a scenario, you must configure static routes
on the public interface as well as inject those routes into the routing protocol on the private
94 Avaya WLAN IP Telephony Installation and Commissioning
on page 94, Figure 21: Not recommended VoWLAN design
on page 93, Figure 20: VPN design over
on page 96, the clouds can
on page 95,
November 2010