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New Member

ISDN BRI problem

Hello,

I' ve a problem unpredictable on my interface bri0/0/0 (HWIC 1B-U card) on cisco 2901 : layer 1 U interface is DEACTIVATED - CO RUNNING LOOPBACK TESTS...

And with this  message it's impossible to run the line. I don't understand why this error message come from.

Thank you for your help.

router#show controllers  bri0/0/0

BRI unit 0:BRI unit 0 with U interface:

Layer 1 internal state is PENDING ACTIVATION

FPGA version = V6

FPGA create  = 09/02/18 24

Layer 1 U interface is DEACTIVATED - CO RUNNING LOOPBACK TESTS

** TELEPHONE COMPANY CENTRAL OFFICE RUNNING TESTS ON LINE **

    External S/T is DEACTIVATED - Requesting Timing

ISDN Line Information:

    Last C/I from ISDN transceiver:

        DR:Deactivation Request

    Last C/I to ISDN transceiver:

B1 Channel Information:

Interface BRI0/0/0:1

Hardware is HDLC32. this B channel is not initialized yet!

Slot 0, Wic_slot 0, Port 0

  0 missed datagrams, 0 overruns

  0 bad datagram encapsulations, 0 memory errors

  0 transmitter underruns  0 d channel collisions

B2 Channel Information:

Interface BRI0/0/0:2

Hardware is HDLC32. this B channel is not initialized yet!

Slot 0, Wic_slot 0, Port 0

  0 missed datagrams, 0 overruns

  0 bad datagram encapsulations, 0 memory errors

  0 transmitter underruns  0 d channel collisions

router#show int bri0/0/0

BRI0/0/0 is up, line protocol is up (spoofing)

  Hardware is HWIC BRI with U interface (82912)

  Interface is unnumbered. Using address of Loopback1 (172.30.122.1)

  MTU 1500 bytes, BW 64 Kbit/sec, DLY 20000 usec,

     reliability 240/255, txload 1/255, rxload 1/255

  Encapsulation PPP, LCP Closed, loopback not set

  Keepalive set (10 sec)

  Last input 00:48:37, output never, output hang never

  Last clearing of "show interface" counters 00:49:14

  Input queue: 0/75/7/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: weighted fair

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

     Conversations  0/0/16 (active/max active/max total)

     Reserved Conversations 0/0 (allocated/max allocated)

     Available Bandwidth 48 kilobits/sec

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

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

     4 packets input, 32 bytes, 0 no buffer

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

     7 input errors, 7 CRC, 0 frame, 0 overrun, 0 ignored, 5 abort

     0 packets output, 0 bytes, 0 underruns

     0 output errors, 0 collisions, 1 interface resets

     0 unknown protocol drops

     0 output buffer failures, 0 output buffers swapped out

     6 carrier transitions

interface BRI0/0/0

ip unnumbered Loopback1

encapsulation ppp

dialer idle-timeout 300

dialer map ip 172.30.122.2 name nim1c1 broadcast 0141335690

dialer hold-queue 4

dialer-group 1

isdn switch-type basic-net3

isdn tei-negotiation first-call

isdn point-to-point-setup

isdn incoming-voice data

isdn sending-complete

trunk-group ALL_BRI 1

ppp authentication chap

Everyone's tags (2)
12 REPLIES
VIP Purple

Re: ISDN BRI problem

Can you please paste the output of the command:

sh isdn status

sh isdn active

If layer 1 is deactivated:please check cable connection and then follow these steps:

Perform the steps in this section and, after each step, issue the show isdn status command to check if Layer 1 is up (ACTIVE).

1. Issue the shutdown then the no shutdown command on the BRI interface .

2. This ensures that the BRI interface is not administratively down. You can also issue the clear interface bri number command to reset the interface.

regards

Please rate if it helps.

New Member

Re: ISDN BRI problem

In fact the channel D is busy, Led NT1 is green. I've reboot the router, same thing, but the line should up only if some icmp packets are send to the other router.

VIP Purple

Re: ISDN BRI problem

can u please paste the output ..then we will see :

sh isn status

Regards

New Member

ISDN BRI problem

here :

router#show isdn status

Global ISDN Switchtype = basic-net3

ISDN BRI0/0/0 interface

        dsl 0, interface ISDN Switchtype = basic-net3

    Layer 1 Status:

        DEACTIVATED

    Layer 2 Status:

        Layer 2 NOT Activated

    Layer 3 Status:

        0 Active Layer 3 Call(s)

    Active dsl 0 CCBs = 0

    The Free Channel Mask:  0x80000003

    Total Allocated ISDN CCBs = 0

VIP Purple

Re: ISDN BRI problem

Hi Remi,

If the show isdn status command output indicates that Layer1 is DEACTIVATED, then there is a problem with the physical connectivity.

1. Issue the shutdown then the  no shutdown command on the BRI interface .

2. This ensures that the BRI interface is not administratively down. You can also issue the clear interface bri number command to reset the interface.

if the problem still exits then :

It most probably TELCO problem only. I have also faced same problem once. I did all possibilities. But still it was showing deactivated. Telco also  done lots of testing.They even came to my location and tested the circuit and told there is no problem at all in their part. But after a long investigation they found some problem in their switching department.

It could be a port issue also. try to swap the connection with another port or module.

Regards

Please rate if it helps.

Hall of Fame Super Gold

Re: ISDN BRI problem

sandeepchoudhary21 wrote:

Hi Remi,

If the show isdn status command output indicates that Layer1 is DEACTIVATED, then there is a problem with the physical connectivity of the T1 line.

That is incorrect. First of all, a BRI circuit is not a " T1 line".

Secondly, anywhere in the world excpet the US, it is normal that telco removes power to the BRI circuit after a timeout. The circuit power is then re-applied as soon a call is attempted in either deictions.

VIP Purple

Re: ISDN BRI problem

Hi Paolo,

Thanks for correction about T1 line, that was my mistake.

Secondly, anywhere in the world excpet the US, it is normal that telco removes power to the BRI circuit after a timeout. The circuit power is then re-applied as soon a call is attempted in either deictions.

I  did not get this point????

and what do you think ,what is the problem with this interface??

Thanks again.

Regards

Hall of Fame Super Gold

Re: ISDN BRI problem

You can search for more posts regarding BRI to understand what that means.

Regarding OP problem, he first update IOS, then post more information

Silver

Re: ISDN BRI problem

remi Houssoulliez wrote:

here :

router#show isdn status

Global ISDN Switchtype = basic-net3

ISDN BRI0/0/0 interface

        dsl 0, interface ISDN Switchtype = basic-net3

    Layer 1 Status:

        DEACTIVATED

    Layer 2 Status:

        Layer 2 NOT Activated

    Layer 3 Status:

        0 Active Layer 3 Call(s)

    Active dsl 0 CCBs = 0

    The Free Channel Mask:  0x80000003

    Total Allocated ISDN CCBs = 0

Remi.

Out of curiosity, what country are you in?

There are several different ISDN switch types which are used, depending on what country you are in. Yours is set to basic-net3, which is only valid on NET3-ISDN switches (Some parts of Europe, norway, New Zealand). If you're in a country which uses a different switch type, you may need to change this to match. Your Telco should be able to telly ou which ISDN switch type you should use.

See the folowing document

http://www.cisco.com/en/US/docs/ios/11_3/feature/guide/natisdn.html

for information on available switch types. For example, as an Aussie, I use basic-ts013 for BRI and primary-net5 for PRI circuits. Mis-match of switch type can cause the interface to not come up.

Also, what type of TA is installed for your ISDN circuit? This can also cause a mis-match. Sorry if this is vague - I'm dredging up stuff I haven't used in literally 10 years from memory.

Cheers.

Hall of Fame Super Gold

Re: ISDN BRI problem

basic-ts013 is obsolete for Australia. I have installation there and all do work fine with basic-net3.

(config)#isdn switch-type ?

basic-1tr6    1TR6 switch type for Germany

  basic-5ess    Lucent 5ESS switch type for the U.S.

  basic-dms100  Northern Telecom DMS-100 switch type for the U.S.

  basic-net3    NET3 switch type for UK, Europe, Asia and Australia

  basic-ni      National ISDN switch type for the U.S.

  basic-qsig    QSIG switch type

  basic-ts013   TS013 switch type for Australia (obsolete)

  ntt           NTT switch type for Japan

  vn3           VN3 and VN4 switch types for France

In fact, also "basic-1tr6" is now obsolete, as well the vestigial "ntt" and "vn3" types.

Silver

Re: ISDN BRI problem

Paolo Bevilacqua wrote:

basic-ts013 is obsolete for Australia. I have installation there and all do work fine with basic-net3.

Like I said, Paolo, I was dredging information from about 10 years ago :-). I haven't used a BRI in ages. I was more concerned that the original poster might be in the US, where basic-net3 won't work.

Cheers.

Hall of Fame Super Gold

Re: ISDN BRI problem

Hi Darren, I was being too zealant, appreciate your contribution here.

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