Frame Relay encapsulation failing

ksarin123_2 · ‎10-26-2009

Hello folks -

I am using a Cisco router as a frame relay switch and using 3 other routers in a hub and spoke configuration. R1 is the hub and R2 and R3 are spokes. R4 is the frame relay switch.

None of the pings are going across. Below is my configuration. Not sure where am I going wrong. Any help would be greatly appreciated.

R4:

interface Serial1/1

description connection to R1

no ip address

encapsulation frame-relay

serial restart-delay 0

clock rate 128000

frame-relay lmi-type cisco

frame-relay intf-type dce

frame-relay route 122 interface Serial1/2 221

frame-relay route 123 interface Serial1/3 321

interface Serial1/2

description connection to R2

no ip address

encapsulation frame-relay

serial restart-delay 0

clock rate 64000

frame-relay lmi-type cisco

frame-relay intf-type dce

frame-relay route 221 interface Serial1/1 122

interface Serial1/3

description connection to R3

no ip address

encapsulation frame-relay

serial restart-delay 0

clock rate 64000

frame-relay lmi-type cisco

frame-relay intf-type dce

frame-relay route 321 interface Serial1/1 123

R1 config:

interface Serial1/0

ip address 172.12.123.1 255.255.255.0

encapsulation frame-relay

serial restart-delay 0

frame-relay map ip 172.12.123.2 122 broadcast

frame-relay map ip 172.12.123.3 123 broadcast

no frame-relay inverse-arp

R2 config:

interface Serial1/0

description Connection to R4

ip address 172.12.123.2 255.255.255.0

encapsulation frame-relay

serial restart-delay 0

frame-relay map ip 172.12.123.1 221 broadcast

frame-relay map ip 172.12.123.3 221 broadcast

no frame-relay inverse-arp

R3 config:

interface Serial1/0

ip address 172.12.123.3 255.255.255.0

encapsulation frame-relay

serial restart-delay 0

no fair-queue

frame-relay map ip 172.12.123.1 321 broadcast

frame-relay map ip 172.12.123.2 321 broadcast

no frame-relay inverse-arp

Peter Paluch · ‎10-26-2009

Hello,

Have you enabled the frame-relay switching on the R4? Also, what does the show frame pvc command say on the individual routers (hub and spokes)? Please be so kind to post it here.

Best regards,

Peter

ksarin123_2 · ‎10-27-2009

Hello Peter -

Frame relay switching is enabled on R4.

Below is the output of sh frame pvc on R1, R2 and R3.

R1#sh frame 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 = 122, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1/0

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

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

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

pvc create time 00:00:48, last time pvc status changed 00:00:28

DLCI = 123, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1/0

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

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

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

pvc create time 00:00:53, last time pvc status changed 00:00:34

R2#sh frame-relay pvc

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

Active Inactive Deleted Static

Local 1 0 0 0

Switched 0 0 0 0

Unused 0 0 0 0

DLCI = 221, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1/0

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

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

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

pvc create time 00:02:37, last time pvc status changed 00:02:17

R3#sh frame-relay pvc

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

Active Inactive Deleted Static

Local 1 0 0 0

Switched 0 0 0 0

Unused 0 0 0 0

DLCI = 321, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1/0

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

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

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

pvc create time 00:03:02, last time pvc status changed 00:02:43

Peter Paluch · ‎10-27-2009

Hello,

Hmmm - everything seems to be okay here. Are you suggesting that the pings are not answered?

Can you please turn on the debug ip packet detail and debug ip icmp on a router and then try pinging some other router in your FR network? Have these two debugs running on both the sender and recipient of the ping so that we can see if the ping is being successfully sent and whether it is received correctly.

Also, are you running these experiments on real hardware or are you using any simulator for these? The Serial1/0 interface suggests that dynamips or similar tool is being used. If this is the case, I suggest double-checking its configuration and removing all stale temporary files - they may be causing the problem.

Best regards,

Peter