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In this post we are going to see how to configure Frame Relay Multi Point Fully Mesh topology using cisco router as frame relay switch in GNS3.



Step 1:Create topology like this,








Step 2:Configure routers Ho and BO1 and BO2 with configurations given below,


In Rotuer HO global config mode,

HO(config)#interface fastethernet2/0
HO(config-if)#ip address 10.0.0.1 255.0.0.0
HO(config-if)#no shutdown
HO(config-if)#exit

HO(config)#interface serial 1/0
HO(config-if)#ip address 20.0.0.1 255.0.0.0
HO(config-if)#encapsulation frame-relay
HO(config-if)#no shutdown
HO(config-if)#exit


In Router BO1 global config mode,

BO1(config)#interface fastethernet2/0
BO1(config-if)#ip address 30.0.0.1 255.0.0.0
BO1(config-if)#no shutdown
BO1(config-if)#exit

BO1(config)#interface serial 1/0
BO1(config-if)#ip address 20.0.0.2 255.0.0.0
BO1(config-if)#encapsulation frame-relay
BO1(config-if)#no shutdown
BO1(config-if)#exit


In Router BO2 global config mode,

BO2(config)#interface fastethernet2/0
BO2(config-if)#ip address 40.0.0.1 255.0.0.0
BO2(config-if)#no shutdown
BO2(config-if)#exit

BO2(config)#interface serial 1/0
BO2(config-if)#ip address 20.0.0.3 255.0.0.0
BO2(config-if)#encapsulation frame-relay
BO2(config-if)#no shutdown
BO2(config-if)#exit


Step 3:Configure host Qemu1,Qemu2 and Qemu3 with appropriate ip address and default gateway


Qemu1 Configuration,

tc@box:~$
tc@box:~$ sudo su
root@box:~#ifconfig eth0 10.0.0.10 netmask 255.0.0.0 up
root@box:~#route add ip default gw 10.0.0.1
root@box:~#route add default gw 10.0.0.1

Qemu2 Configuration,

tc@box:~$
tc@box:~$ sudo su
root@box:~#ifconfig eth0 30.0.0.10 netmask 255.0.0.0 up
root@box:~#route add ip default gw 30.0.0.1
root@box:~#route add default gw 30.0.0.1



Qemu3 Confguration,

tc@box:~$
tc@box:~$ sudo su
root@box:~#ifconfig eth0 40.0.0.10 netmask 255.0.0.0 up
root@box:~#route add ip default gw 40.0.0.1
root@box:~#route add default gw 40.0.0.1



Step 4:Enable Frame Relay in Router FRSW,Command to Enable Frame Relay in Router is

FRSW(config)#frame-relay switching


Step 5:Now configure the interface serial1/0,serial 1/1 and Serial 1/2 with this command to configure PVC between HO to BO1 and HO to BO2,


In FRSW global Config mode,

FRSW(config)#interface serial 1/0
FRSW(config-if)#encapsulation frame-relay
FRSW(config-if)#frame-relay intf-type dce
FRSW(config-if)#frame-relay route 102 interface serial 1/1 201
FRSW(config-if)#frame-relay route 103 interface serial 1/2 301
FRSW(config-if)#no shutdown
FRSW(config-if)#exit

FRSW(config)#interface serial 1/1
FRSW(config-if)#encapsulation frame-relay
FRSW(config-if)#frame-relay intf-type dce
FRSW(config-if)#frame-relay route 201 interface serial 1/0 102
FRSW(config-if)#frame-relay route 104 interface serial 1/2 401
FRSW(config-if)#no shutdown
FRSW(config-if)#exit


FRSW(config)#interface serial 1/2
FRSW(config-if)#encapsulation frame-relay
FRSW(config-if)#frame-relay intf-type dce
FRSW(config-if)#frame-relay route 301 interface serial 1/0 103
FRSW(config-if)#frame-relay route 401 interface serial 1/1 104
FRSW(config-if)#no shutdown
FRSW(config-if)#exit


Step 6:Now configure static route all routers like below,

In Router HO,

HO(config)#ip route 30.0.0.0 255.0.0.0 20.0.0.2
HO(config)#ip route 40.0.0.0 255.0.0.0 20.0.0.3


In Router BO1,

BO1(config)#ip route 10.0.0.0 255.0.0.0 20.0.0.1
BO1(config)#ip route 40.0.0.0 255.0.0.0 20.0.0.3


In Router BO2,

BO2(config)#ip route 10.0.0.0 255.0.0.0 20.0.0.1
BO2(config)#ip route 30.0.0.0 255.0.0.0 20.0.0.2


Step 7:Now go to the host in network 10.0.0.0 and ping  30.0.0.10 and then 40.0.0.10->ping 30.0.010

ping 30.0.0.10

Ping both from 10.0.0.10 and 40.0.0.10





Troubleshooting commands,


HO#show frame-relay map
Serial1/0 (up): ip 20.0.0.2 dlci 102(0x66,0x1860), dynamic,
              broadcast,, status defined, active
Serial1/0 (up): ip 20.0.0.3 dlci 103(0x67,0x1870), dynamic,
              broadcast,, status defined, active




HO#show frame-relay pvc

PVC Statistics for interface Serial1/0 (Frame Relay DTE)

              Active     Inactive      Deleted       Static
  Local          2            0            0            0
  Switched       0            0            0            0
  Unused         0            0            0            0

DLCI = 102, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1/0

  input pkts 11            output pkts 13           in bytes 1074
  out bytes 1168           dropped pkts 0           in pkts dropped 0
  out pkts dropped 0                out bytes dropped 0
  in FECN pkts 0           in BECN pkts 0           out FECN pkts 0
  out BECN pkts 0          in DE pkts 0             out DE pkts 0
  out bcast pkts 2         out bcast bytes 68
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
  pvc create time 00:11:12, last time pvc status changed 00:10:12

DLCI = 103, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1/0

  input pkts 6             output pkts 6            in bytes 554
  out bytes 554            dropped pkts 0           in pkts dropped 0
  out pkts dropped 0                out bytes dropped 0
  in FECN pkts 0           in BECN pkts 0           out FECN pkts 0
  out BECN pkts 0          in DE pkts 0             out DE pkts 0
  out bcast pkts 1         out bcast bytes 34
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
  pvc create time 00:11:14, last time pvc status changed 00:09:35


HO#show frame-relay lmi

LMI Statistics for interface Serial1/0 (Frame Relay DTE) LMI TYPE = CISCO
  Invalid Unnumbered info 0             Invalid Prot Disc 0
  Invalid dummy Call Ref 0              Invalid Msg Type 0
  Invalid Status Message 0              Invalid Lock Shift 0
  Invalid Information ID 0              Invalid Report IE Len 0
  Invalid Report Request 0              Invalid Keep IE Len 0
  Num Status Enq. Sent 105              Num Status msgs Rcvd 77
  Num Update Status Rcvd 0              Num Status Timeouts 28


HO#debug frame-relay lmi
HO#debug frame-relay packet
HO#debug frame-relay


In FRSW,


FRSW#show frame-relay route
Input Intf      Input Dlci      Output Intf     Output Dlci     Status
Serial1/0       102             Serial1/1       201             active
Serial1/0       103             Serial1/2       301             active
Serial1/1       104             Serial1/2       401             active
Serial1/1       201             Serial1/0       102             active
Serial1/2       301             Serial1/0       103             active
Serial1/2       401             Serial1/1       104             active


In BO2,

BO2#show frame-relay map
Serial1/0 (up): ip 20.0.0.1 dlci 301(0x12D,0x48D0), dynamic,
              broadcast,, status defined, active
Serial1/0 (up): ip 20.0.0.2 dlci 401(0x191,0x6410), dynamic,
              broadcast,, status defined, active

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