Cisco 801 - BRI layer 2 status inactive

Discussion in 'Cisco' started by A, Jun 9, 2004.

  1. A

    A Guest

    I am trying to set up a Cisco 801 in Australia with a Telstra ISDN2 Service

    I can't get BRI Layer 2 to an active state

    I have minimised the startup configuration of the 801 for testing purposes
    as below :-

    ------------------------------------
    !
    isdn switch-type basic-net3
    !
    interface Ethernet0
    ip address 192.168.0.240 255.255.255.0
    !
    interface BRI0
    isdn switch-type basic-net3
    no ip address
    no shutdown
    !
    ------------------------------------

    On reboot, the "Line" light on the 801 is lit.
    The Telstra NT1 has the "Line" & "Sync" lights lit.


    "sh isdn status" returns the following :-

    ------------------------------------
    Global ISDN Switchtype = basic-net3
    ISDN BRI0 interface
    dsl 0, interface ISDN Switchtype = basic-net3
    Layer 1 Status:
    ACTIVE
    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

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

    "debug isdn q921" shows the folowing line over & over about once per second
    :-

    ------------------------------------
    *Mar 1 00:01:47.736: ISDN BR0 Q921: User RX <- SABMEp sapi=0 tei=0
    *Mar 1 00:01:48.820: ISDN BR0 Q921: User RX <- SABMEp sapi=0 tei=0
    *Mar 1 00:01:51.084: ISDN BR0 Q921: User RX <- SABMEp sapi=0 tei=0
    *Mar 1 00:01:52.124: ISDN BR0 Q921: User RX <- SABMEp sapi=0 tei=0
    *Mar 1 00:01:53.220: ISDN BR0 Q921: User RX <- SABMEp sapi=0 tei=0
    *Mar 1 00:01:54.320: ISDN BR0 Q921: User RX <- SABMEp sapi=0 tei=0
    ------------------------------------


    "clear interface bri0" shows the following result :-

    ------------------------------------
    *Mar 1 00:02:54.712: ISDN BR0 Q921: User RX <- SABMEp sapi=0 tei=0
    *Mar 1 00:02:54.996: ISDN BR0 Q921: User TX -> IDREQ ri=29609 ai=127
    *Mar 1 00:02:55.984: ISDN BR0 Q921: User RX <- SABMEp sapi=0 tei=0
    *Mar 1 00:02:56.960: ISDN BR0 Q921: User TX -> IDREQ ri=44602 ai=127
    *Mar 1 00:02:57.012: ISDN BR0 Q921: User RX <- SABMEp sapi=0 tei=0
    *Mar 1 00:02:58.112: ISDN BR0 Q921: User RX <- SABMEp sapi=0 tei=0
    *Mar 1 00:02:58.956: ISDN BR0 Q921: User TX -> IDREQ ri=37339 ai=127
    *Mar 1 00:02:59.212: ISDN BR0 Q921: User RX <- SABMEp sapi=0 tei=0
    *Mar 1 00:03:01.384: ISDN BR0 Q921: User RX <- SABMEp sapi=0 tei=0
    *Mar 1 00:03:02.412: ISDN BR0 Q921: User RX <- SABMEp sapi=0 tei=0
    ------------------------------------


    From the Cisco documentation I have determined that the 801 is sending an
    IDREQ (Identity request) requesting a TEI and that an IDASSN (Identity
    Assigned) should be received back, however this IDASSN is not
    forthcoming........


    Can anyone help me with this issue please ?
     
    A, Jun 9, 2004
    #1
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  2. A

    Leon Guest

    I've had the same problem a couple of times before.

    Check that Telstra have set the line up as Point-to-Multipoint and not
    Point-to-point.

    If they have set the line up as Point-to-point you will never get layer
    2 up.

    I hope this helps

    Leon
     
    Leon, Jun 10, 2004
    #2
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  3. A

    A Guest

    Leon,

    thanks for the info - I believe the lines may be set up as point to point -
    I will check & let You & the group know if that was the problem.

    regards

    A
     
    A, Jun 10, 2004
    #3
  4. A

    A Guest

    Leon,

    Checked with Telstra, the line was configured as point-to-point, had them
    change it to point-to-multipoint and all is now working fine.

    Thanks mate :)

    regards

    A
     
    A, Jun 11, 2004
    #4
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