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ISDN Backup Interface

Udupikrishna091
Level 1
Level 1

‎12-13-2011 11:16 PM - edited ‎03-03-2019 06:27 AM

Hello People,

                         I am facing a issue with my ISDN Connection, when I check the ISDN status below is the output

Global ISDN Switchtype = basic-net3

ISDN BRI1/0 interface

        dsl 16, 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 16 CCBs = 0

    The Free Channel Mask:  0x80000003

ISDN BRI1/1 interface

        dsl 17, 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 17 CCBs = 0

    The Free Channel Mask:  0x80000003

ISDN BRI1/2 interface

        dsl 18, 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 18 CCBs = 0

    The Free Channel Mask:  0x80000003

ISDN BRI1/3 interface

        dsl 19, 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 19 CCBs = 0

    The Free Channel Mask:  0x80000003

    Total Allocated ISDN CCBs = 0

Then once I clear the interfaces 2 of the 4 bri becomes active with Frame esatblishment, but that is also temporary, it will become deactivated after sometime, what is the cause for this problem, is ther any way to overcome it???, thanks in advance

Regards

Krishna

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4 Replies 4

smitesh kharecha
Level 5
Level 5

‎12-14-2011 02:58 AM

Hi Krishna,

Couple of question:

1. You have 4 ISDN lines ??

2. If not, then on which BRI port it is terminated.

Now, we are seeing that Layer 1 is deactivated. Can you confirm with your provider that it is UP or DOWN. Alternatively, can you ring from normal PSTN on the ISDN number (provided to you by provider) and check what you are hearing.

Regards,

Smitesh

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Udupikrishna091
Level 1
Level 1
In response to smitesh kharecha

‎12-14-2011 04:22 AM

Hi Smitesh,

          Yes I have 4 ISDN line connected, the moment I clear all the interfaces, 2 of the interfaces get terminated i.e BRI 1/1 and BRI 1/2, then it will be active for some time and goes back to deactivated state later.

Regards

Krishna

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smitesh kharecha
Level 5
Level 5
In response to Udupikrishna091

‎12-14-2011 09:20 AM

Hi Krishna,

Can you also please provide feedback on below as also requested earlier:

Can you confirm with your provider that it is UP or DOWN. Alternatively, can you ring from normal PSTN on the ISDN number (provided to you by provider) and check what you are hearing.

Regards,

Smitesh

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darren.g
Level 5
Level 5

‎12-19-2011 07:40 PM 

Udupi Krishna wrote:
Hello People,
                         I am facing a issue with my ISDN Connection, when I check the ISDN status below is the output
Global ISDN Switchtype = basic-net3
ISDN BRI1/0 interface
        dsl 16, 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 16 CCBs = 0
    The Free Channel Mask:  0x80000003
ISDN BRI1/1 interface
        dsl 17, 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 17 CCBs = 0
    The Free Channel Mask:  0x80000003
ISDN BRI1/2 interface
        dsl 18, 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 18 CCBs = 0
    The Free Channel Mask:  0x80000003
ISDN BRI1/3 interface
        dsl 19, 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 19 CCBs = 0
    The Free Channel Mask:  0x80000003
    Total Allocated ISDN CCBs = 0
Then once I clear the interfaces 2 of the 4 bri becomes active with Frame esatblishment, but that is also temporary, it will become deactivated after sometime, what is the cause for this problem, is ther any way to overcome it???, thanks in advance
Regards
Krishna

Do you have the correct ISDN switch type configured?

Basic-Net3 covers only a couple of countries in Europe and also New Zealand. I don't know where you are, but have you verified which type you need configured?

See the following URL for information on switch types.

http://www.cisco.com/en/US/docs/ios/11_3/feature/guide/natisdn.html#wp4291

Cheers.
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