10-26-2009 02:46 PM - edited 03-04-2019 06:30 AM
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
10-26-2009 04:01 PM
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
10-27-2009 07:04 AM
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
10-27-2009 12:06 PM
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
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