Cannot establish frame relay connection

[drbk563]

I have a frame relay switch setup. Which is setup with a four router network. One of the routers is not establishing a connection to the frame relay switch. This router is Router2. Router2 is connected to the Frame Relay Switch on Serial 1. Below is a copy of the configuration of the frame relay switch and Router2's configuration. What is wrong in the configuration?

Thank You

!
interface Serial1
no ip address
encapsulation frame-relay
logging event subif-link-status
logging event dlci-status-change
clockrate 56000
frame-relay intf-type dce
frame-relay route 112 interface Serial3 211
frame-relay route 197 interface Serial0 791
frame-relay route 532 interface Serial2 235
!
interface Serial2
no ip address
encapsulation frame-relay
clockrate 56000
frame-relay intf-type dce
frame-relay route 235 interface Serial1 532
frame-relay route 602 interface Serial3 206
frame-relay route 691 interface Serial0 196
!
interface Serial3
no ip address
encapsulation frame-relay
clockrate 56000
frame-relay intf-type dce
frame-relay route 206 interface Serial2 602
frame-relay route 211 interface Serial1 112
frame-relay route 297 interface Serial0 792
!
interface TokenRing0
no ip address
shutdown
!
interface TokenRing1
no ip address
shutdown
!
ip classless
no ip http server
!
!
!
line con 0
exec-timeout 0 0
login
line aux 0
transport input all
line vty 0 4
login
!
end

Router2 Config

Current configuration : 1022 bytes
!
version 12.2
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Router2
!
logging rate-limit console 10 except errors
!
ip subnet-zero
no ip finger
no ip domain-lookup
!
no ip dhcp-client network-discovery
!
!
!
!
interface Loopback0
ip address 2.2.2.2 255.255.255.255
!
interface Ethernet0
ip address 172.12.23.2 255.255.255.0
!
interface Serial0
ip address 172.12.123.2 255.255.255.0
encapsulation frame-relay
no fair-queue
frame-relay map ip 172.12.123.1 112 broadcast
frame-relay map ip 172.12.123.3 532 broadcast
frame-relay map ip 172.12.123.7 197 broadcast
!
interface Serial1
no ip address
shutdown
!
interface BRI0
no ip address
shutdown
isdn x25 static-tei 0
cdapi buffers regular 0
cdapi buffers raw 0
cdapi buffers large 0
!
ip kerberos source-interface any
ip classless
ip http server
!
!
!
line con 0
exec-timeout 0 0
logging synchronous
transport input none
line aux 0
line vty 0 4
login
!
end

 

[helpdeskdan]

I'd try debug frame-relay lmi; I believe it gives more detailed information about the lmi's which is what we need to see.

 

[drbk563]

Here is what I get after I do a "debug frame-relay lmi" on the frame-relay switch. Interface Serial 1 is the one with the problem.

Frame_Relay_Switch#debug frame-relay lmi
Frame Relay LMI debugging is on
Displaying all Frame Relay LMI data
Frame_Relay_Switch#
1w0d: Serial3(in): StEnq, myseq 126
1w0d: RT IE 1, length 1, type 1
1w0d: KA IE 3, length 2, yourseq 127, myseq 126
1w0d: Serial3(out): Status, myseq 127, yourseen 127, DCE up
Frame_Relay_Switch#
1w0d: Serial0(in): StEnq, myseq 22
1w0d: RT IE 1, length 1, type 1
1w0d: KA IE 3, length 2, yourseq 23, myseq 22
1w0d: Serial0(out): Status, myseq 23, yourseen 23, DCE up
Frame_Relay_Switch#
1w0d: Serial2(in): StEnq, myseq 113
1w0d: RT IE 1, length 1, type 1
1w0d: KA IE 3, length 2, yourseq 114, myseq 113
1w0d: Serial2(out): Status, myseq 114, yourseen 114, DCE up
Frame_Relay_Switch#
1w0d: Serial1(in): StEnq, myseq 233
1w0d: RT IE 1, length 1, type 0
1w0d: KA IE 3, length 2, yourseq 3 , myseq 0
1w0d: Serial1(out): Status, myseq 234, yourseen 3, DCE down
1w0d: Serial3(in): StEnq, myseq 127
1w0d: RT IE 1, length 1, type 1
1w0d: KA IE 3, length 2, yourseq 128, myseq 127
1w0d: Serial3(out): Status, myseq 128, yourseen 128, DCE up
Frame_Relay_Switch#
1w0d: Serial0(in): StEnq, myseq 23
1w0d: RT IE 1, length 1, type 1
1w0d: KA IE 3, length 2, yourseq 24, myseq 23
1w0d: Serial0(out): Status, myseq 24, yourseen 24, DCE up
Frame_Relay_Switch#
1w0d: Serial2(in): StEnq, myseq 114
1w0d: RT IE 1, length 1, type 1
1w0d: KA IE 3, length 2, yourseq 115, myseq 114
1w0d: Serial2(out): Status, myseq 115, yourseen 115, DCE up
Frame_Relay_Switch#
1w0d: Serial1(in): StEnq, myseq 234
1w0d: RT IE 1, length 1, type 0
1w0d: KA IE 3, length 2, yourseq 4 , myseq 0
1w0d: Serial1(out): Status, myseq 235, yourseen 4, DCE down
1w0d: Serial3(in): StEnq, myseq 128
1w0d: RT IE 1, length 1, type 0
1w0d: KA IE 3, length 2, yourseq 129, myseq 128
1w0d: Serial3(out): Status, myseq 129, yourseen 129, DCE up
Frame_Relay_Switch#
1w0d: Serial0(in): StEnq, myseq 24
1w0d: RT IE 1, length 1, type 1
1w0d: KA IE 3, length 2, yourseq 25, myseq 24
1w0d: Serial0(out): Status, myseq 25, yourseen 25, DCE up

 

[S3M1N0L3]

You can see the issue with LMI from the debug. The sequence numbers are messed up (compared to the working interfaces on the FRS). Until these match up like the other interfaces, LMI won't come up.

Can you run a debug for Router 7 and for the FRS at the same time (and show only the Serial1 interface for the FRS)?

Start both and try to have the debugs synchronized so you can see what is happening on both sides. Then you can see which router isn't seeing the other or which isn't responding correctly to the LMI messages. If you can synch them up, you can review it on a per packet instance.

Is there a spare Serial on Router 7, has the cable been checked / swapped?

FRS is seeing the LMI from Router 7, router 7 doesn't see anything from FRS as far as LMI. Either the LMI from the FRS isn't getting to router 7 at all or it's corrupt. No counters for LMI seen on router 7 but they are sent from FRS.

I would debug both ends and match up the sequence numbers to see if Router 7 is getting anything from the FRS and then adjust fire. Also noticed that the sho interfaces you posted don't seem to go all the way to the end (DTE control leads and carrier transitions). If these are the same type interfaces as the others, could you be sure to post that last section of each as well? That will tell you if there are physical issues with that cable or interface.

 

[drbk563]

Ok I got the debug synchronized together. Below is the output. Yes there is a spare Serial on Router7 which is serial 1 and it has be tried and I get the same problem. The cable was also checked and swapped and is working fine. Below there is also a copy of the sh interfaces from the Frame Relay Switch and Router7.

Thank You

Frame_Relay_Switch#
00:08:09: Serial1(in): StEnq, myseq 23
00:08:09: RT IE 1, length 1, type 0
00:08:09: KA IE 3, length 2, yourseq 4 , myseq 0
00:08:09: Serial1(out): Status, myseq 24, yourseen 4, DCE down
Frame_Relay_Switch#
00:08:19: Serial1(in): StEnq, myseq 24
00:08:19: RT IE 1, length 1, type 0
00:08:19: KA IE 3, length 2, yourseq 5 , myseq 0
00:08:19: Serial1(out): Status, myseq 25, yourseen 5, DCE down
Frame_Relay_Switch#
00:08:29: Serial1(in): StEnq, myseq 25
00:08:29: RT IE 1, length 1, type 0
00:08:29: KA IE 3, length 2, yourseq 6 , myseq 0
00:08:29: Serial1(out): Status, myseq 26, yourseen 6, DCE down
Frame_Relay_Switch#
00:08:39: Serial1(in): StEnq, myseq 26
00:08:39: RT IE 1, length 1, type 0
00:08:39: KA IE 3, length 2, yourseq 7 , myseq 0
00:08:39: Serial1(out): Status, myseq 27, yourseen 7, DCE down

Router7#
00:05:30: Serial0(out): StEnq, myseq 4, yourseen 0, DTE down
00:05:30: datagramstart = 0xE30BD8, datagramsize = 13
00:05:30: FR encap = 0xFCF10309
00:05:30: 00 75 01 01 00 03 02 04 00
00:05:30:
00:05:40: Serial0(out): StEnq, myseq 5, yourseen 0, DTE down
00:05:40: datagramstart = 0xE30BD8, datagramsize = 13
00:05:40: FR encap = 0xFCF10309
00:05:40: 00 75 01 01 00 03 02 05 00
00:05:40:
00:05:50: Serial0(out): StEnq, myseq 6, yourseen 0, DTE down
00:05:50: datagramstart = 0xE30BD8, datagramsize = 13
00:05:50: FR encap = 0xFCF10309
00:05:50: 00 75 01 01 00 03 02 06 00
00:05:50:
00:06:00: Serial0(out): StEnq, myseq 7, yourseen 0, DTE down
00:06:00: datagramstart = 0xE30BD8, datagramsize = 13
00:06:00: FR encap = 0xFCF10309
00:06:00: 00 75 01 01 00 03 02 07 00
00:06:00:

Serial0 is up, line protocol is up
Hardware is HD64570
MTU 1500 bytes, BW 1544 Kbit, 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
LMI enq recvd 83, LMI stat sent 82, LMI upd sent 0, DCE LMI up
LMI DLCI 1023 LMI type is CISCO frame relay DCE
FR SVC disabled, LAPF state down
Broadcast queue 0/64, broadcasts sent/dropped 0/0, interface broadcasts 0
Last input 00:00:06, output 00:00:06, output hang never
Last clearing of "show interface" counters 00:13:45
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
88 packets input, 1208 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
83 packets output, 1239 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
Serial1 is up, line protocol is down
Hardware is HD64570
MTU 1500 bytes, BW 1544 Kbit, 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
LMI enq recvd 66, LMI stat sent 66, LMI upd sent 0, DCE LMI down
LMI DLCI 1023 LMI type is CISCO frame relay DCE
FR SVC disabled, LAPF state down
Broadcast queue 0/64, broadcasts sent/dropped 0/0, interface broadcasts 0
Last input 00:00:04, output 00:00:04, output hang never
Last clearing of "show interface" counters 00:13:57
Input queue: 0/75/20/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
106 packets input, 2646 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
72 packets output, 3110 bytes, 0 underruns
0 output errors, 0 collisions, 24 interface resets
0 output buffer failures, 0 output buffers swapped out
58 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
Serial2 is up, line protocol is up
Hardware is HD64570
MTU 1500 bytes, BW 1544 Kbit, 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
LMI enq recvd 85, LMI stat sent 85, LMI upd sent 0, DCE LMI up
LMI DLCI 1023 LMI type is CISCO frame relay DCE
FR SVC disabled, LAPF state down
Broadcast queue 0/64, broadcasts sent/dropped 0/0, interface broadcasts 0
Last input 00:00:02, output 00:00:02, output hang never
Last clearing of "show interface" counters 00:14:01
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
92 packets input, 1322 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
87 packets output, 1677 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
Serial3 is up, line protocol is up
Hardware is HD64570
MTU 1500 bytes, BW 1544 Kbit, 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
LMI enq recvd 85, LMI stat sent 85, LMI upd sent 0, DCE LMI up
LMI DLCI 1023 LMI type is CISCO frame relay DCE
FR SVC disabled, LAPF state down
Broadcast queue 0/64, broadcasts sent/dropped 0/0, interface broadcasts 0
Last input 00:00:04, output 00:00:04, output hang never
Last clearing of "show interface" counters 00:14:03
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
89 packets input, 1200 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
87 packets output, 1445 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up



Serial0 is up, line protocol is down
Hardware is HD64570
Internet address is 172.12.123.7/24
MTU 1500 bytes, BW 1544 Kbit, 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 65, LMI stat recvd 0, LMI upd recvd 0, DTE LMI down
LMI enq recvd 0, LMI stat sent 0, LMI upd sent 0
LMI DLCI 1023 LMI type is CISCO frame relay DTE
FR SVC disabled, LAPF state down
Broadcast queue 0/64, broadcasts sent/dropped 0/0, interface broadcasts 0
Last input never, output 00:00:03, output hang never
Last clearing of "show interface" counters 00:11:01
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
98 packets output, 1285 bytes, 0 underruns
0 output errors, 0 collisions, 19 interface resets
0 output buffer failures, 0 output buffers swapped out
44 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
Serial1 is administratively down, line protocol is down
Hardware is HD64570
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/0/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=down DSR=down DTR=down RTS=down CTS=down

 

[helpdeskdan]

You are getting quite a few interface resets & carrier transitions. It still seems like bad hardware.

http://www.cisco.com/univercd/cc/td/doc/cisintwk/itg_v1/tr1915.htm#wp1020941

 

[drbk563]

Looks like you are right the hardware is bad.

Thank You everyone for your help