Topology

 

lab

Addressing Table
Device Interface IPv4 and IPv6 Address Default Gateway
R1 G0/0 192.168.1.1/24

2001:DB8:ACAD:A::1/64

FE80::1 link-local

 N/A
S0/0/0 (DCE) 10.1.1.1/30

2001:DB8:ACAD:B::1/64

FE80::1 link-local

 N/A
FR S0/0/0 N/A N/A
S0/0/1 (DCE) N/A N/A
R3 G0/0 192.168.3.1/24

2001:DB8:ACAD:C::3/64

FE80::3 link-local

 N/A
S0/0/1 10.1.1.2/30

2001:DB8:ACAD:B::3/64

FE80::3 link-local

 N/A
PC-A NIC 192.168.1.3/24

2001:DB8:ACAD:A::A/64

 192.168.1.1

FE80::1
PC-C NIC 192.168.3.3/24

2001:DB8:ACAD:C::C/64

 192.168.3.1

FE80::3
Objectives

Part 1: Build the Network and Configure Basic Device Settings

Part 2: Configure a Frame Relay Switch

Part 3: Configure Basic Frame Relay

Part 4: Troubleshoot Frame Relay

Part 5: Configure a Frame Relay Subinterface

Required Resources
  • 3 Routers (Cisco 1941 with Cisco IOS Release 15.2(4)M3 universal image or comparable)
  • 2 PCs (Windows 7, Vista, or XP with terminal emulation program, such as Tera Term)
  • Console cables to configure the Cisco IOS devices via the console ports
  • Ethernet and serial cables as shown in the topology
  • Build the Network and Configure Basic Device Settings
Steps
In Part 1, you will set up the network topology and configure basic settings on the PC hosts and routers.
  • Cable the network as shown in the topology.
  • Initialize and reload the routers as necessary.
  • Configure basic settings for each router.
    1. Disable DNS lookup.
    2. Configure device names as shown in the topology.
    3. Assign class as the privileged EXEC mode password.
    4. Assign cisco as the console and vty passwords and enable login.
    5. Configure logging synchronous for the console line.
    6. Encrypt the plain text passwords.
    7. Configure a MOTD banner to warn users that unauthorized access is prohibited.
    8. Set the clocking rate for all DCE serial interfaces to 128000.
    9. Configure the IPv4 and IPv6 addresses listed in the Addressing Table for all interfaces. Do not activate the serial interfaces at this time.
    10. Copy the running configuration to the startup configuration.
  • Configure PC hosts.

Refer to the Addressing Table for PC host address information.

  • Test connectivity.

At this point, the PCs will not be able to ping each other, but they should be able to ping their default gateway. Test both protocols, IPv4 and IPv6. Verify and troubleshoot if necessary.

  • Configure a Frame Relay Switch
In Part 2, you will configure a Frame Relay switch. You will create permanent virtual circuits (PVCs) and assign Data Link Connection Identifiers (DLCIs). This configuration creates two PVCs: one from R1 to R3 (DLCI 103), and one from R3 to R1 (DLCI 301).
  • Configure the FR router as a Frame Relay switch.

The frame-relay switching command enables Frame Relay switching globally on a router, allowing it to forward frames based on the incoming DLCI rather than an IP address.

FR(config)# frame-relay switching

  • Change the interface encapsulation on S0/0/0.

Change the interface encapsulation type to Frame Relay. Like HDLC or PPP, Frame Relay is a data-link layer protocol that specifies the framing of Layer 2 traffic.

FR(config)# interface s0/0/0

FR(config-if)# encapsulation frame-relay

  • Change the interface type to DCE.

Changing the interface type to DCE tells the router to send Local Management Interface (LMI) keepalives and allows Frame Relay route statements to be applied.

Note: Frame Relay interface types do not need to match the underlying physical interface type. A physical DTE serial interface can act as a Frame Relay DCE interface, and a physical DCE interface can act as a logical Frame Relay DTE interface.

FR(config)# interface s0/0/0

FR(config-if)# frame-relay intf-type dce

  • Configure DLCI.

Configure the router to forward incoming traffic on interface S0/0/0 with DLCI 103 to S0/0/1 with an output of DLCI of 301.

FR(config-if)# frame-relay route 103 interface s0/0/1 301

FR(config-if)# no shutdown

  • Configure Frame Relay on S0/0/1.

FR(config)# interface s0/0/1

FR(config-if)# encapsulation frame-relay

FR(config-if)# frame-relay intf-type dce

FR(config-if)# frame-relay route 301 interface s0/0/0 103

FR(config-if)# no shutdown

  • Verify Frame Relay configuration.
    1. Use the show frame-relay pvc command to verify that Frame Relay is configured correctly.

FR# show frame-relay pvc

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

Active     Inactive      Deleted       Static

Local          0            0            0            0

Switched       0            1            0            0

Unused         0            0            0            0

 

DLCI = 103, DLCI USAGE = SWITCHED, PVC STATUS = INACTIVE, INTERFACE = Serial0/0/0

input pkts 0             output pkts 0            in bytes 0

out bytes 0              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 0         out bcast bytes 0

30 second input rate 0 bits/sec, 0 packets/sec

30 second output rate 0 bits/sec, 0 packets/sec

switched pkts 0

Detailed packet drop counters:

no out intf 0            out intf down 0          no out PVC 0

in PVC down 0            out PVC down 0           pkt too big 0

shaping Q full 0         pkt above DE 0           policing drop 0

connected to interface Serial0/0/1 301

pvc create time 00:00:53, last time pvc status changed 00:00:53

 

PVC Statistics for interface Serial0/0/1 (Frame Relay DCE)

Active     Inactive      Deleted       Static

Local          0            0            0            0

Switched       0            1            0            0

Unused         0            0            0            0

DLCI = 301, DLCI USAGE = SWITCHED, PVC STATUS = INACTIVE, INTERFACE = Serial0/0/1

input pkts 0             output pkts 0            in bytes 0

out bytes 0              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 0         out bcast bytes 0

30 second input rate 0 bits/sec, 0 packets/sec

30 second output rate 0 bits/sec, 0 packets/sec

switched pkts 0

Detailed packet drop counters:

no out intf 0            out intf down 0          no out PVC 0

in PVC down 0            out PVC down 0           pkt too big 0

shaping Q full 0         pkt above DE 0           policing drop 0

connected to interface Serial0/0/0 103

pvc create time 00:00:16, last time pvc status changed 00:00:16

  1. Issue the show frame-relay route This is the Layer 2 route that Frame Relay traffic takes through the network. (Do not confuse this with Layer 3 IP routing.)

FR# show frame-relay route

Input Intf      Input Dlci      Output Intf     Output Dlci     Status

Serial0/0/0     103             Serial0/0/1     301             inactive

Serial0/0/1     301             Serial0/0/0     103             inactive

  • Configure Basic Frame Relay
In Part 3, you will configure Frame Relay on routers R1 and R3. After Frame Relay is configured, you will enable the EIGRP routing protocol to provide end-to-end connectivity.
  • Configure R1 for Frame Relay.

Inverse ARP allows distant ends of a Frame Relay link to discover each other dynamically, and provides a dynamic method of mapping IP addresses to DLCIs. Although Inverse ARP is useful, it is not always reliable. The best practice is to map IP addresses to DLCIs statically and disable Inverse ARP.

  1. Change the encapsulation on S0/0/0 to Frame Relay.

R1(config)# interface s0/0/0

R1(config-if)# encapsulation frame-relay

  1. Use the no frame-relay inverse-arp command to disable Inverse ARP.

R1(config)# interface s0/0/0

R1(config-if)# no frame-relay inverse-arp

  1. Use the frame-relay map command to map an IP address to a DLCI statically. In addition to mapping an IP to a DLCI, Cisco IOS software allows several other Layer 3 protocol addresses to be mapped. In the following command, the broadcast keyword sends any multicast or broadcast traffic destined for this link over the DLCI. Most routing protocols require the broadcast keyword to function properly over Frame Relay. You can use the broadcast keyword on multiple DLCIs on the same interface. The traffic is replicated to all PVCs.

Note: The IPv6 Frame Relay map to a global unicast address does not include the broadcast keyword. However, the broadcast keyword is used in the mapping to the link-local address. IPv6 routing protocols use link-local addresses for multicast routing updates; therefore, only the link-local address map requires the broadcast keyword to forward multicast packets.

R1(config)# interface s0/0/0

R1(config-if)# frame-relay map ip 10.1.1.2 103 broadcast

R1(config-if)# frame-relay map ipv6 2001:db8:acad:b::3 103

R1(config-if)# frame-relay map ipv6 fe80::3 103 broadcast

  1. For the router to ping its own interface, the DLCI must be created to map to the local interface.

R1(config)# interface s0/0/0

R1(config-if)# frame-relay map ip 10.1.1.1 103

R1(config-if)# frame-relay map ipv6 2001:db8:acad:b::1 103

Use the no shutdown command to activate S0/0/0.

R1(config-if)# no shutdown

  • Configure R3 for Frame Relay.

R3(config)# interface s0/0/1

R3(config-if)# encapsulation frame-relay

R3(config-if)# no frame-relay inverse-arp

R3(config-if)# frame-relay map ip 10.1.1.1 301 broadcast

R3(config-if)# frame-relay map ipv6 2001:db8:acad:b::1 301

R3(config-if)# frame-relay map ipv6 fe80::1 301 broadcast

R3(config-if)# frame-relay map ip 10.1.1.2 301

R3(config-if)# frame-relay map ipv6 2001:db8:acad:b::3 301

R3(config-if)# no shutdown

Why is the no shutdown command used after the no frame-relay inverse-arp command?

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  • Verify that Frame Relay is active.
    1. You should now be able to ping R3 from R1. It may take several seconds after bringing up the interfaces for the PVCs to become active.

R1# ping 10.1.1.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 28/30/40 ms

R1# ping 2001:db8:acad:b::3

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 2001:DB8:ACAD:B::3, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms

  1. Ping R1 from R3.

R3# ping 10.1.1.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms

R3# ping 2001:db8:acad:b::1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 2001:DB8:ACAD:B::1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 24/26/28 ms

  1. Issue the show frame-relay pvc command to display PVC status information on R1 and R3.

R1# show frame-relay pvc

 

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

 

Active     Inactive      Deleted       Static

Local          1            0            0            0

Switched       0            0            0            0

Unused         0            0            0            0

 

DLCI = 103, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0/0/0

 

input pkts 22            output pkts 154          in bytes 2240

out bytes 10860          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 134       out bcast bytes 8780

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

pvc create time 01:59:40, last time pvc status changed 01:55:14

 

R3# show frame-relay pvc

 

PVC Statistics for interface Serial0/0/1 (Frame Relay DTE)

 

Active     Inactive      Deleted       Static

Local          1            0            0            0

Switched       0            0            0            0

Unused         0            0            0            0

 

DLCI = 301, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0/0/1

 

input pkts 158           output pkts 22           in bytes 11156

out bytes 2240           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 160

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

pvc create time 01:57:20, last time pvc status changed 01:56:19

  1. Issue the show frame-relay route command on FR to verify that status of the Frame Relay map statements.

FR# show frame-relay route

Input Intf      Input Dlci      Output Intf     Output Dlci     Status

Serial0/0/0     103             Serial0/0/1     301             active

Serial0/0/1     301             Serial0/0/0     103             active

  1. Issue the show frame-relay map command on R1 and R3 to display a summary of the static and dynamic mappings of Layer 3 addresses to DLCIs. Because Inverse ARP has been turned off, there are only static maps.

R1# show frame-relay map

Serial0/0/0 (up): ipv6 FE80::3 dlci 103(0x67,0x1870), static,

broadcast,

CISCO, status defined, active

Serial0/0/0 (up): ipv6 2001:DB8:ACAD:B::1 dlci 103(0x67,0x1870), static,

CISCO, status defined, active

Serial0/0/0 (up): ip 10.1.1.1 dlci 103(0x67,0x1870), static,

CISCO, status defined, active

Serial0/0/0 (up): ipv6 2001:DB8:ACAD:B::3 dlci 103(0x67,0x1870), static,

CISCO, status defined, active

Serial0/0/0 (up): ip 10.1.1.2 dlci 103(0x67,0x1870), static,

broadcast,

CISCO, status defined, active

 

R3# show frame-relay map

Serial0/0/1 (up): ipv6 FE80::1 dlci 301(0x12D,0x48D0), static,

broadcast,

CISCO, status defined, active

Serial0/0/1 (up): ipv6 2001:DB8:ACAD:B::3 dlci 301(0x12D,0x48D0), static,

CISCO, status defined, active

Serial0/0/1 (up): ip 10.1.1.2 dlci 301(0x12D,0x48D0), static,

CISCO, status defined, active

Serial0/0/1 (up): ipv6 2001:DB8:ACAD:B::1 dlci 301(0x12D,0x48D0), static,

CISCO, status defined, active

Serial0/0/1 (up): ip 10.1.1.1 dlci 301(0x12D,0x48D0), static,

broadcast,

CISCO, status defined, active

Note: The FR router acts as a Layer 2 device, so there is no need to map Layer 3 addresses to Layer 2 DLCIs.

  • Configure EIGRP on R1 and R3.
    1. Enable IPv6 routing on R1 and R3.
    2. Using AS 1, enable EIGRP for IPv4 and IPv6 on R1 and R3 for all networks. Set the router ID for R1 as 1.1.1.1 and 3.3.3.3 for R3.
  • Verify end-to-end connectivity.

Ping PC-C from PC-A. If your pings were unsuccessful, troubleshoot until you have end-to-end connectivity.

Note: It may be necessary to disable the PC firewall for pings to be successful.

  • Troubleshoot Frame Relay

In Part 4, you will break the Frame Relay connection established earlier and use some tools to troubleshoot Frame Relay. A variety of tools are available for troubleshooting Frame Relay connectivity issues.

  • Debug Local Management Interface (LMI).
    1. Issue the debug frame-relay lmi command on R1. The output gives detailed information on all LMI data. Keepalives are sent every 10 seconds by default, so you may have to wait until you see any output. The output shows an outgoing LMI packet with a sequence number of 50. The last LMI message received from FR had a sequence number of 49. The output is also showing an incoming LMI message from FR to R1 with a sequence number of 50. DLCI 103 is the only DLCI on this link, and it is currently active.

R1# debug frame-relay lmi

Frame Relay LMI debugging is on

Displaying all Frame Relay LMI data

R1#

*Jun 26 18:28:45.922: Serial0/0/0(out): StEnq, myseq 50, yourseen 49, DTE up

*Jun 26 18:28:45.922: datagramstart = 0xC318D54, datagramsize = 13

*Jun 26 18:28:45.922: FR encap = 0xFCF10309

*Jun 26 18:28:45.922: 00 75 01 01 01 03 02 32 31

*Jun 26 18:28:45.922:

*Jun 26 18:28:45.922: Serial0/0/0(in): Status, myseq 50, pak size 13

*Jun 26 18:28:45.922: RT IE 1, length 1, type 1

*Jun 26 18:28:45.922: KA IE 3, length 2, yourseq 50, myseq 50

*Jun 26 18:28:45.922: PVC IE 0x7 , length 0x6 , dlci 103 , status 0x2 , bw 0

  1. Issue the undebug all command to turn off debugging.

Note: This command can be abbreviated to u all. This is useful to know when debug information is flooding the screen.

R1# undebug all

All possible debugging has been turned off

  • Remove the IPv4 frame map from R1.
    1. Issue the no frame-relay map command to remove the IPv4 frame map on R1.

R1(config)# interface s0/0/0

R1(config-if)# no frame-relay map ip 10.1.1.2 103 broadcast

  1. Issue the debug ip icmp command on R1.

R1# debug ip icmp

ICMP packet debugging is on

  1. Ping R1 from R3. Pings should not be successful. However, debug messages on R1 show that the ICMP packets from R3 are reaching R1.

Note: You should see console messages reporting the EIGRP adjacency going up and down. This is sometimes called flapping.

R3# ping 10.1.1.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:

…..

Success rate is 0 percent (0/5)

 

R1#

*Jun 26 20:12:35.693: ICMP: echo reply sent, src 10.1.1.1, dst 10.1.1.2, topology BASE, dscp 0 topoid 0

R1#

*Jun 26 20:12:37.689: ICMP: echo reply sent, src 10.1.1.1, dst 10.1.1.2, topology BASE, dscp 0 topoid 0

R1#

*Jun 26 20:12:39.689: ICMP: echo reply sent, src 10.1.1.1, dst 10.1.1.2, topology BASE, dscp 0 topoid 0

R1#

*Jun 26 20:12:41.689: ICMP: echo reply sent, src 10.1.1.1, dst 10.1.1.2, topology BASE, dscp 0 topoid 0

R1#

*Jun 26 20:12:43.689: ICMP: echo reply sent, src 10.1.1.1, dst 10.1.1.2, topology BASE, dscp 0 topoid 0

Why does the ping fail?

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  1. Issue the show frame-relay map command on R1. The IPv4 map for R3 is missing from the list.

R1# show frame-relay map

Serial0/0/0 (up): ipv6 FE80::3 dlci 103(0x67,0x1870), static,

broadcast,

CISCO, status defined, active

Serial0/0/0 (up): ipv6 2001:DB8:ACAD:B::1 dlci 103(0x67,0x1870), static,

CISCO, status defined, active

Serial0/0/0 (up): ip 10.1.1.1 dlci 103(0x67,0x1870), static,

CISCO, status defined, active

Serial0/0/0 (up): ipv6 2001:DB8:ACAD:B::3 dlci 103(0x67,0x1870), static,

CISCO, status defined, active

  1. Issue the undebug all command to turn off debugging on R1.

R1# undebug all

All possible debugging has been turned off

  1. Re-apply the frame-relay map ip command to S0/0/0 on R1, but without using the broadcast keyword.

R1(config)# interface s0/0/0

R1(config-if)# frame-relay map ip 10.1.1.2 103

  1. Ping R1 from R3. Pings should be successful, but the EIGRP adjacency continues to flap. It may take a few minutes between each message because of the EIGRP timers.

R3# ping 10.1.1.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms

 

R1(config-if)#

*Jun 26 20:25:10.871: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.1.1.2 (Serial0/0/0) is down: Interface PEER-TERMINATION received

*Jun 26 20:28:13.673: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.1.1.2 (Serial0/0/0) is up: new adjacency

R1(config-if)#

*Jun 26 20:31:18.185: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.1.1.2 (Serial0/0/0) is down: retry limit exceeded

R1(config-if)#

*Jun 26 20:32:00.977: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.1.1.2 (Serial0/0/0) is up: new adjacency

R1(config-if)#

*Jun 26 20:35:05.489: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.1.1.2 (Serial0/0/0) is down: retry limit exceeded

Why does the EIGRP adjacency continue to flap?

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  1. Replace the Frame Relay map statement and include the broadcast keyword this time.

R1(config-if)# frame-relay map ip 10.1.1.2 103 broadcast

  1. Verify that the full routing table is restored and that you have end-to-end connectivity.
  • Change the Frame Relay encapsulation type.

Cisco IOS software supports two types of Frame Relay encapsulation: the default Cisco encapsulation and the standards-based IETF encapsulation.

  1. Change the Frame Relay encapsulation on S0/0/1 on R3 to IETF.

R3(config)# interface s0/0/1

R3(config-if)# encapsulation frame-relay ietf

  1. Issue the show interfaces s0/0/1 command on R3 and FR. Even though the encapsulation is different on each interface, the link is still active. This is because Cisco routers understand both types of incoming frames. However, if you have routers from different vendors and you are using Frame Relay, then the IETF standard must be used.

R3# show interfaces s0/0/1

Serial0/0/1 is up, line protocol is up

Hardware is WIC MBRD Serial

Internet address is 10.1.1.2/30

MTU 1500 bytes, BW 1544 Kbit/sec, DLY 20000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation FRAME-RELAY IETF, loopback not set

Keepalive set (10 sec)

LMI enq sent  1898, LMI stat recvd 1900, LMI upd recvd 0, DTE LMI up

<output omitted>

 

FR# show interfaces s0/0/1

Serial0/0/1 is up, line protocol is up

Hardware is WIC MBRD Serial

MTU 1500 bytes, BW 1544 Kbit/sec, DLY 20000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation FRAME-RELAY, loopback not set

Keepalive set (10 sec)

LMI enq sent  0, LMI stat recvd 0, LMI upd recvd 0

  1. Reset the R3 Frame Relay encapsulation back to Cisco (the default).

R3(config)# interface s0/0/1

R3(config-if)# encapsulation frame-relay

2. Change the LMI type.

  • Issue the frame-relay lmi-type ansi command on interface S0/0/1 on R3.

R3(config-if)# frame-relay lmi-type ansi

  1. After at least 60 seconds, issue the show interfaces s0/0/1 command on R3. When 60 seconds have passed, the interface changes its state to up, then down, because R3 is expecting ANSI LMI, and FR is sending Cisco LMI.

R3# show interfaces s0/0/1

Serial0/0/1 is up, line protocol is down

Hardware is WIC MBRD Serial

Internet address is 10.1.1.2/30

MTU 1500 bytes, BW 1544 Kbit/sec, DLY 20000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation FRAME-RELAY, loopback not set

Keepalive set (10 sec)

LMI enq sent  2157, LMI stat recvd 2136, LMI upd recvd 0, DTE LMI down

LMI enq recvd 0, LMI stat sent  0, LMI upd sent  0

LMI DLCI 0  LMI type is ANSI Annex D  frame relay DTE  segmentation inactive

FR SVC disabled, LAPF state down

Broadcast queue 0/64, broadcasts sent/dropped 733/0, interface broadcast

<output omitted>

  1. On R3, issue the show frame-relay lmi command to display LMI information, including LMI type, number of timeouts, and the amount of time since the last full update.

R3# show frame-relay lmi

 

LMI Statistics for interface Serial0/0/1 (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 2158             Num Status msgs Rcvd 2136

Num Update Status Rcvd 0              Num Status Timeouts 23

Last Full Status Req 00:00:05         Last Full Status Rcvd 00:04:35

  1. On R3, issue the debug frame-relay lmi The LMI packets no longer display in pairs. While all outgoing LMI messages are logged, no incoming messages display because R3 is expecting ANSI LMI, and FR is sending Cisco LMI.

R3# debug frame-relay lmi

Frame Relay LMI debugging is on

Displaying all Frame Relay LMI data

R3#

*Jun 26 21:49:10.829: Serial0/0/1(out): StEnq, myseq 104, yourseen 0, DTE down

*Jun 26 21:49:10.829: datagramstart = 0xC313554, datagramsize = 14

*Jun 26 21:49:10.829: FR encap = 0x00010308

*Jun 26 21:49:10.829: 00 75 95 01 01 00 03 02 68 00

*Jun 26 21:49:10.829:

R3#

*Jun 26 21:49:20.829: Serial0/0/1(out): StEnq, myseq 105, yourseen 0, DTE down

*Jun 26 21:49:20.829: datagramstart = 0xC317554, datagramsize = 14

*Jun 26 21:49:20.829: FR encap = 0x00010308

*Jun 26 21:49:20.829: 00 75 95 01 01 00 03 02 69 00

*Jun 26 21:49:20.829:

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