2-12
Vanguard Routing Model
WAN Adapter
LCON over Frame
Relay using RFC
1490 Encapsulation
This example depicts use of the maximum number of LAN Connections. At the
regional site is a Vanguard that needs to connect with up to 254 branch sites over
Frame Relay. Frame Relay supports a 254 DLCI maximum per node and permanent
SVCs only. These LCONs can be connected in any combination of router interfaces
and bridge links as long as the total capacity is not exceeded. Supported
encapsulation types over Frame Relay are Codex Proprietary and RFC1294/1490.
Figure 2-5 shows this example.
Figure 2-5. Maximum LAN Connections Over Frame Relay With Codex
Proprietary or RFC1294 and Permanent SVCs
Vanguard
Terminal Server
Cisco
254 Branches
Vanguard
IP Host
Token Ring
Vanguard
Token Ring
Branch 1
Branch 2xx
Vanguard
Legacy
Protocol
Server
Codex Prop
Encaps or
RFC1294
Image Server
Branch 2
Branch 3
DLCI 1
DLCI 4
DLCI 2
DLCI 5
DLCI 3
Codex Prop
Encaps or
RFC1294
254 Branches
Central Site