Here I am going to configure about how a router act as frame
relay switch. One important thing is that Frame-Relay switch must be configured
as DCE. (The Frame-Relay switch must be DCE. In GNS3 on both sites serial
interface is DCE, whatever that need to configure clock rate. Clock rate depend
on cable type you have. Check out about DCE or DTE by typing ##show
controller interface s0/1 command)
Topology of network:
Frame-Relay Network
Topology:
Step 1: Turn on Frame-Relay
PVC switching capable feature on this route.
FrameRelay(config)#frame-relay switching >> Global
Config mode
Step 2: Configure
Serial interface to provide Frame-Relay switching
FrameRelay(config)#interface serial 0/0
FrameRelay(config-if)#encapsulation frame-relay
FrameRelay(config-if)#clock rate 64000 >> For DCE
FrameRelay(config-if)#frame-relay intf-type dce >> Configure a FR DCE
FrameRelay(config-if)#no frame-relay inverse-arp >> to
disable inverse-arp
Step 3: Now
configure Frame-Relay router, it’s configure under the interface.
FrameRelay(config)#interface serial 0/0 >> under this
interface
FrameRelay(config-if)#frame-relay route 102 interface serial
0/1 201
FrameRelay(config-if)#frame-relay route 103 interface serial
0/2 301
What the command does? # frame-relay route 103(the
incoming DLCI into s0/0) interface serial 0/1(Outgoing
interface toward destination DLCI) 301(Destination DLCI)
If we put the “FrameRelay(config-if)#frame-relay intf-type
dce” command without having “FrameRelay(config)#frame-relay
switching” command than we get this message:
Note: From above example configure all interfaces as your requirement.
Step 4: Configure
Frame-Relay client router as point-to-point or multipoint
Frame-Relay Point-to-Point example:
HQ(config)#interface serial 0/0
HQ(config-if)#encapsulation frame-relay
HQ(config-if)#exit
HQ(config-if)#no shutdown >> apply after all
configuration
Configure Sub Interface -
HQ(config)#interface serial 0/0.102 point-to-point
HQ(config-subif)#ip address 192.168.1.1 255.255.255.252
HQ(config-subif)#frame-relay interface-dlci 102 >>
HQ(config-subif)#exit
HQ(config)#interface serial 0/0.103 point-to-point
HQ(config-subif)#ip address 192.168.2.1 255.255.255.252
HQ(config-subif)#frame-relay interface-dlci 103 >>
HQ(config-subif)#exit
HQ(config-subif)#frame-relay interface-dlci 103 What the command does? If any time you (Traffic) use this sub interface, make sure
that you use this (102 (Local DLCI)) DLCI to go out. No map necessary, no
broadcast keyword as like multipoint configuration.
Note: Like same configuration to all routers who act as
frame-relay client.
Frame Relay Show or Troubleshoot
command:
Frame-Relay Switch (Router):
FrameRelay#show frame-relay pvc
FrameRelay#show frame-relay route >> to show the Frame-Relay route
FrameRelay#show frame-relay lmi
Frame-Relay Client (Router):
HQ#show frame-relay map
HQ#show frame-relay lmi
HQ#show frame-relay pvc
Ping test:
Show Running Configuration of topology routers:
FrameRelay (Router):
!
interface Serial0/0
no ip address
encapsulation
frame-relay
serial restart-delay
0
clockrate 64000
no
dce-terminal-timing-enable
no frame-relay
inverse-arp
frame-relay intf-type
dce
frame-relay route 102
interface Serial0/1 201
frame-relay route 103
interface Serial0/2 301
!
interface Serial0/1
no ip address
encapsulation
frame-relay
serial restart-delay
0
clockrate 64000
no
dce-terminal-timing-enable
no frame-relay
inverse-arp
frame-relay intf-type
dce
frame-relay route 104
interface Serial0/2 401
frame-relay route 201
interface Serial0/0 102
!
interface Serial0/2
no ip address
encapsulation
frame-relay
serial restart-delay
0
clockrate 64000
no
dce-terminal-timing-enable
no frame-relay
inverse-arp
frame-relay intf-type
dce
frame-relay route 301
interface Serial0/0 103
frame-relay route 401
interface Serial0/1 104
!
HQ (Router):
!
interface Serial0/0
no ip address
encapsulation
frame-relay
serial restart-delay
0
no
dce-terminal-timing-enable
!
interface Serial0/0.102 point-to-point
ip address
192.168.1.1 255.255.255.252
frame-relay
interface-dlci 102
!
interface Serial0/0.103 point-to-point
ip address
192.168.2.1 255.255.255.252
frame-relay
interface-dlci 103
!
Branch1 (Router):
!
interface Serial0/1
no ip address
encapsulation
frame-relay
serial restart-delay
0
no
dce-terminal-timing-enable
!
interface Serial0/1.104 point-to-point
ip address 192.168.3.1
255.255.255.252
frame-relay
interface-dlci 104
!
interface Serial0/1.201 point-to-point
ip address
192.168.1.2 255.255.255.252
frame-relay
interface-dlci 201
!
Branch2 (Router):
!
interface Serial0/2
no ip address
encapsulation
frame-relay
serial restart-delay
0
no
dce-terminal-timing-enable
!
interface Serial0/2.301 point-to-point
ip address
192.168.2.2 255.255.255.252
frame-relay
interface-dlci 301
!
interface Serial0/2.401 point-to-point
ip address
192.168.3.2 255.255.255.252
frame-relay
interface-dlci 401
!
