Configuring Frame Relay in GNS3 with OSPF

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Today I have been configuring frame relay in GNS3.

My setup is one frame relay switch with one virtual frame relay circuit, point to point.



Here is the configuration for the interfaces on R1 and R2.

R1#sh run | sec interface Serial0/0
interface Serial0/0
 no ip address
 encapsulation frame-relay
 clock rate 2000000
 cdp enable
interface Serial0/0.1 point-to-point
 ip address 192.168.1.254 255.255.255.252
 frame-relay interface-dlci 101
R1#
R1#sh run | sec interface Loopback1
interface Loopback1
 ip address 172.16.1.1 255.255.255.0
R1#
R2#sh run | sec interface Serial0/0
interface Serial0/0
 no ip address
 encapsulation frame-relay
 clock rate 2000000
 cdp enable
interface Serial0/0.1 point-to-point
 ip address 192.168.1.253 255.255.255.252
 frame-relay interface-dlci 202
R2#
R2#sh run | sec interface Loopback1
interface Loopback1
 ip address 172.16.2.1 255.255.255.0
R2#

Notice the clock rate is specified on both R1 and R2. This is not an error as GNS3 is unable to simulate DTE and DCE interfaces properly. I belive this works fine in Packet Tracer though.

Here is the configuration for OSPF for routers R1 and R2

R1#sh run | sec ospf
router ospf 100
 router-id 11.0.0.0
 log-adjacency-changes
 network 172.16.1.0 0.0.0.255 area 0
 network 192.168.1.252 0.0.0.3 area 0
R1#
R2#sh run | sec ospf
router ospf 100
 router-id 10.0.0.0
 log-adjacency-changes
 network 172.16.2.0 0.0.0.255 area 0
 network 192.168.1.252 0.0.0.3 area 0
R2#

Here is the output of various 'show frame-relay' commands for both routers.

R1#sh frame-relay map
Serial0/0.1 (up): point-to-point dlci, dlci 101(0x65,0x1850), broadcast
          status defined, active
R1#sh frame-relay lmi

LMI Statistics for interface Serial0/0 (Frame Relay DTE) LMI TYPE = ANSI
  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 159              Num Status msgs Rcvd 156
  Num Update Status Rcvd 0              Num Status Timeouts 3
  Last Full Status Req 00:00:26         Last Full Status Rcvd 00:00:26
R1#sh frame-relay pvc

PVC Statistics for interface Serial0/0 (Frame Relay DTE)

              Active     Inactive      Deleted       Static
  Local          1            0            0            0
  Switched       0            0            0            0
  Unused         0            0            0            0

DLCI = 101, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0/0.1

  input pkts 226           output pkts 240          in bytes 25460
  out bytes 27109          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 209       out bcast bytes 23929
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
  pvc create time 00:26:16, last time pvc status changed 00:25:43
R1#

R2#sh frame-relay map
Serial0/0.1 (up): point-to-point dlci, dlci 202(0xCA,0x30A0), broadcast
          status defined, active
R2#sh frame-relay lmi

LMI Statistics for interface Serial0/0 (Frame Relay DTE) LMI TYPE = ANSI
  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 269              Num Status msgs Rcvd 266
  Num Update Status Rcvd 0              Num Status Timeouts 3
  Last Full Status Req 00:00:15         Last Full Status Rcvd 00:00:15
R2#sh frame-relay pvc

PVC Statistics for interface Serial0/0 (Frame Relay DTE)

              Active     Inactive      Deleted       Static
  Local          1            0            0            0
  Switched       0            0            0            0
  Unused         0            0            0            0

DLCI = 202, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0/0.1

  input pkts 203           output pkts 212          in bytes 22853
  out bytes 23512          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 197       out bcast bytes 21952
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
  pvc create time 00:22:58, last time pvc status changed 00:22:58
R2#
Here is the output for 'show ip route' on both routers

R1#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

     172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C       172.16.1.0/24 is directly connected, Loopback1
O       172.16.2.1/32 [110/65] via 192.168.1.253, 00:22:42, Serial0/0.1
     192.168.1.0/30 is subnetted, 1 subnets
C       192.168.1.252 is directly connected, Serial0/0.1
R1#

R2#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

     172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
O       172.16.1.1/32 [110/65] via 192.168.1.254, 00:22:04, Serial0/0.1
C       172.16.2.0/24 is directly connected, Loopback1
     192.168.1.0/30 is subnetted, 1 subnets
C       192.168.1.252 is directly connected, Serial0/0.1
R2#
Here is output for 'show ip ospf database' and 'show ip ospf interface'. This has been executed on both routers.
R1#sh ip ospf database

            OSPF Router with ID (11.0.0.0) (Process ID 100)

                Router Link States (Area 0)

Link ID         ADV Router      Age         Seq#       Checksum Link count
10.0.0.0        10.0.0.0        1522        0x80000003 0x00DA0B 3
11.0.0.0        11.0.0.0        1521        0x80000001 0x00C620 3
R1#sh ip ospf interface
Loopback1 is up, line protocol is up
  Internet Address 172.16.1.1/24, Area 0
  Process ID 100, Router ID 11.0.0.0, Network Type LOOPBACK, Cost: 1
  Loopback interface is treated as a stub Host
Serial0/0.1 is up, line protocol is up
  Internet Address 192.168.1.254/30, Area 0
  Process ID 100, Router ID 11.0.0.0, Network Type POINT_TO_POINT, Cost: 64
  Transmit Delay is 1 sec, State POINT_TO_POINT
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
    oob-resync timeout 40
    Hello due in 00:00:06
  Supports Link-local Signaling (LLS)
  Index 1/1, flood queue length 0
  Next 0x0(0)/0x0(0)
  Last flood scan length is 1, maximum is 1
  Last flood scan time is 0 msec, maximum is 0 msec
  Neighbor Count is 1, Adjacent neighbor count is 1
    Adjacent with neighbor 10.0.0.0
  Suppress hello for 0 neighbor(s)
R1#

R2#sh ip ospf data

            OSPF Router with ID (10.0.0.0) (Process ID 100)

                Router Link States (Area 0)

Link ID         ADV Router      Age         Seq#       Checksum Link count
10.0.0.0        10.0.0.0        1564        0x80000003 0x00DA0B 3
11.0.0.0        11.0.0.0        1565        0x80000001 0x00C620 3
R2#sh ip ospf database

            OSPF Router with ID (10.0.0.0) (Process ID 100)

                Router Link States (Area 0)

Link ID         ADV Router      Age         Seq#       Checksum Link count
10.0.0.0        10.0.0.0        1567        0x80000003 0x00DA0B 3
11.0.0.0        11.0.0.0        1568        0x80000001 0x00C620 3
R2#sh ip ospf interface
Loopback1 is up, line protocol is up
  Internet Address 172.16.2.1/24, Area 0
  Process ID 100, Router ID 10.0.0.0, Network Type LOOPBACK, Cost: 1
  Loopback interface is treated as a stub Host
Serial0/0.1 is up, line protocol is up
  Internet Address 192.168.1.253/30, Area 0
  Process ID 100, Router ID 10.0.0.0, Network Type POINT_TO_POINT, Cost: 64
  Transmit Delay is 1 sec, State POINT_TO_POINT
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
    oob-resync timeout 40
    Hello due in 00:00:02
  Supports Link-local Signaling (LLS)
  Index 2/2, flood queue length 0
  Next 0x0(0)/0x0(0)
  Last flood scan length is 1, maximum is 1
  Last flood scan time is 0 msec, maximum is 0 msec
  Neighbor Count is 1, Adjacent neighbor count is 1
    Adjacent with neighbor 11.0.0.0
  Suppress hello for 0 neighbor(s)
R2#

I have posted this as I thought it might be useful to someone who wants to briefly study the configuration.

Hope it helps!!! 




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