Chapter 8 The VPN Transport Screens
User’s Guide
84
8.1.1 What You Can Do in This Chapter
•The General screen (
Section 8.2 on page 85) lets you turn VPN transport on or off, and to
set the VPN transport endpoint (your service provider’s router).
•The Customer Interface screen (
Section 8.3 on page 86) lets you specify which users can
use which WiMAX network links.
•The Ethernet Pseudowire screen (
Section 8.4 on page 90) lets you configure the links
over the WiMAX network between the WiMAX Modem and the service provider’s router.
•The Statistics screen (
Section 8.5 on page 92) lets you view performance information
about the VPN transport connections.
8.1.2 What You Need to Know
The following terms and concepts may help as you read through this chapter.
Identifying Users
For the WiMAX Modem’s VPN Transport feature to work, it must be able to identify users on
the LAN. It does this by examining VLAN (Virtual Local Area Network) tags.
These tags must be added to the data packets by a switch on the LAN. In the following
example, two users (A and B) are connected to a switch (C). A and B are connected to
different ports on the switch (port 1 and port 2). A and B send untagged packets to the switch.
The switch adds tags to packets depending on the physical port on which they arrive. Packets
arriving on port 1 are given a VLAN ID (VLAN IDentifier) of 1, and packets arriving on port
2 are given a VLAN ID of 2. When the packets reach the WiMAX Modem (D), their source is
identified by examining their VLAN tags.
Figure 40 Identifying Users
A
B
PORT 1
PORT 2
PORT 1 VLAN 1
PORT 2 VLAN 2
1
2
C
D
