346 Chapter 10: X.25/Frame Relay Topologies
Figure 10-12
Frame Relay
encapsulation frame-relay
no ip mroute-cache
cdp enable
frame-relay map ip 192.168.100.1 104 broadcast
LA#sh ip route
C 192.168.100.0/24 is directly connected, Serial0
Example 10-3
Frame Relay (Continued)
New York - Central site
CSU/DSU
CSU/DSU
Serial 0
64 K
Los Angeles - Remote
site
Chicago site is added using a point-to-point link - costly
New York
Serial 0
CSU/DSU
CSU/DSU
CSU/DSU
CSU/DSU
Serial 0
64 K
64 K
Serial 0
Serial 0
Chicago - Remote site
Los Angeles - Remote
site
With Frame Relay, only 1 CSU/DSU and Serial port at central site for multiple remote sites.
New York - Central site
Serial 0
CSU/DSU
CSU/DSU
CSU/DSU
Serial 0
64 K
64 K
Serial 0
Chicago - Remote site
192.168.100.2
Los Angeles - Remote
site
192.168.100.1
Star topology or hub
and spoke
DLCI 104
DLCI 104
Cloud
Local loop
Serial 0
128 K
192.168.100.3
87200333.book Page 346 Wednesday, August 22, 2001 2:53 PM