Vanguard Routing Model
2-17
T0100-01, Revision B
Release 5.4
LANView of the WAN - Group LCONs
LANView of the WAN - Group LCONs
What is a LANView
of the WAN?
The LANView feature provides flexible configuration of all virtual circuits over the
WAN port for either single or multiple IP interface addresses.
The connection point of any IP forwarder to a network is called a Router Interface.
A Router Interface has an IP Host address associated with it. This interface address
must have its network portion equal to the network number to which it connects.
The LANView feature can map several SVCs/PVCs to a single Router Interface.
This is useful for adding new Vanguard nodes at branch sites, or when adding Dial
on Demand or Bandwidth on Demand connections to a node. Configuring a Wide
Area Network as a single IP network avoids costly workstation and PC
reconfigurations.
A LANView of the WAN allows a group of SVC connections, known as a LAN
Connection Group, to be mapped to a single IP Router Interface, and thus a single IP
network level address. This lets the WAN be treated as a logical LAN, where all
nodes on the logical LAN use the same IP network level address.
The LANView of WAN also applies to Router IPX addresses. All WAN SVCs in a
LAN Connection Group are considered to be on the same IPX Network Number.
In the discussions that follow, a Network Address is the combination of the Network
and Subnetwork Address.
Examples
Figure 2-9 shows the LANView concept. The IP topology shows all Vanguards
connected to IP Network Address 192.168.0.0. However, each of the Vanguards has
been assigned a unique Host address.
Figure 2-9. LANView Topology
In this example, Vanguard-A has three SVCs, one to each remote destination. Each
SVC is configured with a different Next Hop Address of 192.168.0.2 for
Vanguard-B, 192.168.0.3 for Vanguard-C, and 192.168.0.4 for Vanguard-D. All
three SVCs, or LCONs are associated with a single Router Interface in Vanguard-A.
The interface in Vanguard-A is assigned the IP address 192.168.0.1. The concept is
similar to a LAN, where each Vanguard is assigned an IP address, as shown in
Figure 2-10.
Vanguard-A
Vanguard-B
192.0.0.0
192.168.0.2
Vanguard-C
Vanguard-D
192.168.0.3
192.168.0.4
192.168.0.1
