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New Member

Help w/ Frame Relay and subinterfaces

I am a CCNA and starting to work on my CCNP, I just started working for a new company and my first project is to find out what was wrong with their Frame Relay connection and FIX IT!. I have pasted the config below that was done by somebody else.

Can somebody help me figure this out?

Thanks in advance,

Matt

Notes:

This is new and was configured by somebody else but has never worked. (I noticed that the PVC has been deleted...Could that be it and what command would turn it on?)

-----------------------------------------

sh run

Building configuration...

Current configuration : 871 bytes

!

version 12.1

!

interface Serial0/0

no ip address

encapsulation frame-relay

frame-relay lmi-type ansi

!

interface Serial0/0.1 point-to-point

ip address 10.20.63.2 255.255.255.0

frame-relay interface-dlci 110

!

interface FastEthernet0/1

no ip address

shutdown

duplex auto

speed auto

!

ip classless

no ip http server

!

snmp-server community public RO

!

end

---------------------------------------

sh frame pvc

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

Active Inactive Deleted Static

Local 0 0 1 0

Switched 0 0 0 0

Unused 0 0 0 0

DLCI = 110, DLCI USAGE = LOCAL, PVC STATUS = DELETED, INTERFACE = Serial0/0.1

input pkts 0 output pkts 12 in bytes 0

out bytes 1947 dropped pkts 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 3 out bcast bytes 1011

pvc create time 16:27:10, last time pvc status changed 15:17:52

----------------------------------------

sh frame map

Serial0/0.1 (down): point-to-point dlci, dlci 110(0x6E,0x18E0), broadcast

status deleted

----------------------------------------

sh ip int br

Serial0/0 unassigned YES manual up down

Serial0/0.1 10.20.63.2 YES manual down down

23 REPLIES
New Member

Re: Help w/ Frame Relay and subinterfaces

"deleted" in this case means that there is no LMI being received for this PVC on your serial interface, but you have referenced the DLCI number in your config.

Eg: You have serial0/0.1 using the config "frame-relay interface-dlci 110". If you don't receive LMI for DLCI 110, show fame pvc says that 110 is "deleted".

What would really help is a "show int s0/0".

It looks like you're up/down on your main interface which probably means that your LMI setting is wrong. You'll need to verify some things with the telco, but I can't be sure until we see the "show int".

Mick.

New Member

Re: Help w/ Frame Relay and subinterfaces

Can you paste the "show int S0/0" results? Looks like LMI issues...

New Member

Re: Help w/ Frame Relay and subinterfaces

Here is "int ser 0/0 and ser 0/0.1"

Thanks,

sh int ser 0/0

Serial0/0 is up, line protocol is down

Hardware is PQUICC with Fractional T1 CSU/DSU

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 25152, LMI stat recvd 0, LMI upd recvd 0, DTE LMI down

LMI enq recvd 42, LMI stat sent 0, LMI upd sent 0

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

Broadcast queue 0/64, broadcasts sent/dropped 7/0, interface broadcasts 0

Last input 2d00h, output 00:00:08, output hang never

Last clearing of "show interface" counters 5d18h

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

44 packets input, 1262 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 1 giants, 0 throttles

325239 input errors, 16435 CRC, 144433 frame, 0 overrun, 0 ignored, 164371

abort

25167 packets output, 355409 bytes, 0 underruns

0 output errors, 0 collisions, 16637 interface resets

0 output buffer failures, 0 output buffers swapped out

11 carrier transitions

DCD=up DSR=up DTR=up RTS=up CTS=up

-------------------------------------------

sh int ser 0/0.1

Serial0/0.1 is down, line protocol is down

Hardware is PQUICC with Fractional T1 CSU/DSU

Internet address is 10.20.63.2/24

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

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

Encapsulation FRAME-RELAY

Matt

New Member

Re: Help w/ Frame Relay and subinterfaces

Your problem is right here:

44 packets input, 1262 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 1 giants, 0 throttles 325239 input errors, 16435 CRC, 144433 frame, 0 overrun, 0 ignored, 164371 abort

It would appear that you have a problem talking to the telco. Verify the following with telco:

1) Framing (ESF) and linecoding (b8zs).

2) Channels used. It appears you're configured for all 24 channels of a T1.

3) Have them Loop the connection and test for errors.

4) Since this is a WIC, verify that this isn't a "wet" (sealing current) line.

5) Make sure your cable to the T1 Smartjack is good.

These are the tough ones, and don't believe the telco when they say that their circuit is fine. They're notorious for saying that without properly testing it first.

Mick.

New Member

Re: Help w/ Frame Relay and subinterfaces

This is great info, I noticed you said we are set for all 24 channels, a full T1. I have instructions here that say "have a 512k ports, so you must setup you CSU/DSU for 512k or 8 DS0 channels."

If that is the error how would I go about changing that?

By the way we have a 2600 series with an internal CSU/DSU,

Thanks again

matt

New Member

Re: Help w/ Frame Relay and subinterfaces

If you're using the first 8 channels, place this in the Serial0/0 config:

service-module t1 timeslots 1-8 speed 64

Mick.

New Member

Re: Help w/ Frame Relay and subinterfaces

I just finished that and it worked great, the line came up, but I am not able to see the other router and I am not able to ping myself (ser 0/0.1), I am sure it is related but what do you think

Thanks again,

matt

New Member

Re: Help w/ Frame Relay and subinterfaces

Now, do a show int ser0/0 and a show frame pvc.

This will tell us alot.

Also, do you have other access to the remote side so we can do the same thing?

Mick.

New Member

Re: Help w/ Frame Relay and subinterfaces

Here it is

local router:

sh frame 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 = 110, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0/0.1

input pkts 0 output pkts 150 in bytes 0

out bytes 40044 dropped pkts 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 111 out bcast bytes 35988

pvc create time 22:42:18, last time pvc status changed 01:39:56

----------------------------------------------------------

sh int ser 0/0

Serial0/0 is up, line protocol is up

Hardware is PQUICC with Fractional T1 CSU/DSU

MTU 1500 bytes, BW 512 Kbit, 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 26163, LMI stat recvd 608, LMI upd recvd 0, DTE LMI up

LMI enq recvd 42, LMI stat sent 0, LMI upd sent 0

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

Broadcast queue 0/64, broadcasts sent/dropped 116/0, interface broadcasts 4

Last input 00:00:01, output 00:00:01, output hang never

Last clearing of "show interface" counters 5d21h

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 384 kilobits/sec

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

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

652 packets input, 10289 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 1 giants, 0 throttles

325240 input errors, 16435 CRC, 144434 frame, 0 overrun, 0 ignored, 164371

abort

26317 packets output, 407997 bytes, 0 underruns

0 output errors, 0 collisions, 16772 interface resets

0 output buffer failures, 0 output buffers swapped out

11 carrier transitions

DCD=up DSR=up DTR=up RTS=up CTS=up

----------------------------------------------------------------

this is the remote router

show int s1/1

Serial1/1 is up, line protocol is up

Hardware is M4T

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

reliablility 255/255, txload 1/255, rxload 1/255

Encapsulation FRAME-RELAY IETF, crc 16, loopback not set

Keepalive set (10 sec)

LMI enq sent 3056963, LMI stat recvd 3056917, LMI upd recvd 0, DTE LMI up

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

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

Broadcast queue 0/64, broadcasts sent/dropped 2286452/0, interface broadcasts 135

Last input 00:00:00, output 00:00:00, output hang never

Last clearing of "show interface" counters never

Input queue: 0/75/0 (size/max/drops); Total output drops: 637072

Queueing strategy: weighted fair

Output queue: 0/1000/64/636680 (size/max total/threshold/drops)

Conversations 0/95/256 (active/max active/max total)

Reserved Conversations 0/0 (allocated/max allocated)

5 minute input rate 5000 bits/sec, 12 packets/sec

5 minute output rate 8000 bits/sec, 9 packets/sec

636377478 packets input, 2647806373 bytes, 0 no buffer

Received 26141280 broadcasts, 1 runts, 17 giants, 0 throttles

543635 input errors, 537730 CRC, 0 frame, 994 overrun, 0 ignored, 4911 abort

809157080 packets output, 3384058614 bytes, 0 underruns

0 output errors, 0 collisions, 8 interface resets

0 output buffer failures, 0 output buffers swapped out

489 carrier transitions DCD=up DSR=up DTR=up RTS=up CTS=up

thanks,

matt

New Member

Re: Help w/ Frame Relay and subinterfaces

You should probably "clear counter" on both routers to assist in troubleshooting but they look good from here. There are alot of errors on the remote router but this could be old since the counters have never been cleared, and the interface is up/up.

You should be able to ping the remote router now. Since the status is "active", this means that both sides of the PVC are up. "Inactive" means that only one side is up.

On both sides:

clear counters

show frame pvc

show int s0/0

sh ip int brief

sh ver

Post this and we'll see what's what.

Mick.

New Member

Re: Help w/ Frame Relay and subinterfaces

I'll do that and post it, but shouldn't I be able to ping my subinterface ser 0/0.1

matt

New Member

Re: Help w/ Frame Relay and subinterfaces

Probably, but I've seen that fail for odd reasons.

What is the IP address of the remote side, and is it also a p2p sub-if? You should be able to ping it.

New Member

Re: Help w/ Frame Relay and subinterfaces

Here is the info for the local router, I am no longer able to access the remote router for today.

sh ip int br

Interface IP-Address OK? Method Status Prot

ocol

FastEthernet0/0 10.100.50.15 YES manual up up

Serial0/0 unassigned YES manual up up

Serial0/0.1 10.20.63.2 YES manual up up

FastEthernet0/1 unassigned YES manual administratively down down

-----------------------------------------------

sh frame 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 = 110, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0/0.1

input pkts 0 output pkts 2 in bytes 0

out bytes 674 dropped pkts 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 674

pvc create time 1d00h, last time pvc status changed 01:21:49

------------------------------------------------

sh int ser 0/0

Serial0/0 is up, line protocol is up

Hardware is PQUICC with Fractional T1 CSU/DSU

MTU 1500 bytes, BW 512 Kbit, 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 15, LMI stat recvd 15, LMI upd recvd 0, DTE LMI up

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

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

Broadcast queue 0/64, broadcasts sent/dropped 3/0, interface broadcasts 0

Last input 00:00:02, output 00:00:02, output hang never

Last clearing of "show interface" counters 00:02:24

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 384 kilobits/sec

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

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

15 packets input, 220 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

18 packets output, 1221 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

------------------------------------------------------

sh ver

Cisco Internetwork Operating System Software

IOS (tm) C2600 Software (C2600-I-M), Version 12.1(5)T10, RELEASE SOFTWARE (fc2)

TAC Support: http://www.cisco.com/tac

Copyright (c) 1986-2001 by cisco Systems, Inc.

Compiled Wed 08-Aug-01 03:08 by ccai

Image text-base: 0x80008088, data-base: 0x80972628

ROM: System Bootstrap, Version 12.1(3r)T2, RELEASE SOFTWARE (fc1)

stsrouter2 uptime is 1 week, 3 hours, 52 minutes

System returned to ROM by power-on

System image file is "flash:c2600-i-mz.121-5.T10"

cisco 2651 (MPC860P) processor (revision 0x200) with 27648K/5120K bytes of memor

y.

Processor board ID JAB05370BMF (3769800967)

M860P processor: part number 5, mask 2

Bridging software.

X.25 software, Version 3.0.0.

2 FastEthernet/IEEE 802.3 interface(s)

1 Serial network interface(s)

32K bytes of non-volatile configuration memory.

8192K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102

Thank you for your patience

matt

New Member

Re: Help w/ Frame Relay and subinterfaces

Here is a discrepancy that I noticed.

ser 0/0

remote router:

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

my router:

MTU 1500 bytes, BW 512 Kbit, DLY 20000 usec,

--

ser 0/0.1

remote:

MTU 1500 bytes, BW 256 Kbit, DLY 20000 usec,

my:

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

matt

New Member

Re: Help w/ Frame Relay and subinterfaces

Don't worry about the BW at this time. Its only used to determine metrics for routing protocols (for the most part). It won't affect your connectivity.

We'll wait for tomorrow to see the info off the remote router then.

Mick.

New Member

Re: Help w/ Frame Relay and subinterfaces

Thanks so much for your time and help. I was able to compare configs and fix the problem first thing this morning.

Thanks again,

matt

New Member

Re: Help w/ Frame Relay and subinterfaces

BW(Bandwidth)is also used for Network Management, through of SNMP protocol, for calculate utilization Interface rate.

New Member

Re: Help w/ Frame Relay and subinterfaces

Mick if you are still there, I have one more question, I am able to see and ping the remote router from my router, but I cannot ping the remote router from any workstations. We are using static routes. Any suggestions?

Thanks again,

matt

New Member

Re: Help w/ Frame Relay and subinterfaces

First try to ping the ethernet address of the far router. If you can't ping it, it is because you don't have a route to it on your router.

Next go to your router and type PING with no address.

enter the destination address as the remote router and the protocol as IP.

Press for everything until you get to "extended commands" then press "y"

Make the source IP address your ethernet interface of your router.

If the ping fails, it is because the far router doesn't have a route back to your ethernet.

Mick.

New Member

Re: Help w/ Frame Relay and subinterfaces

One problem after another... but I am learning alot.

That worked, I was able to ping the remote eth int from my router, but I just tried to ping my PC from the Frame-Relay WAN sub-interface and I am unable to, although I can ping the eth int from the WAN sub-int.

Thanks,

Matt

New Member

Re: Help w/ Frame Relay and subinterfaces

That would mean that the default gateway set on your PC doesn't have a route to the FR.

Mick.

New Member

Re: Help w/ Frame Relay and subinterfaces

Thanks so much again to Mick and Marion for all your help. I had figured that it was probably the default gateway, but I wasn't sure and you confirmed it for me. Everything is up and running great now. Thanks again for your time and patience.

Matt

New Member

Re: Help w/ Frame Relay and subinterfaces

You must to configure a static route for Network Address of the LAN workstations.

In border router, configure route for Address Network of LAN.

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