callback stopped working after IOS upgrade

Discussion in 'Cisco' started by Victor Sudakov, Jun 26, 2007.

  1. Colleagues,

    After IOS upgrade from 12.2(27) to 12.2(46) callback stopped working
    with the following message:

    1951: TTY38 Callback PPP process creation
    1952: TTY38 Callback process initiated, user: dialstring 9427624
    1953: TTY38 Callback process before disconnect- modemcheck status=20090081

    Platform: cisco 2621, NM-8A/DM, modem firmware source: IOS.

    Any ideas what this message means and how to fix the problem?

    Downgrading to 12.2(27) does fix the problem with callback (this means
    the callback configuration is correct), but a downgrade is not desirable
    as 12.2(27) has other bugs.
     
    Victor Sudakov, Jun 26, 2007
    #1
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  2. ~ After IOS upgrade from 12.2(27) to 12.2(46) callback stopped working
    ~ with the following message:
    ~
    ~ 1951: TTY38 Callback PPP process creation
    ~ 1952: TTY38 Callback process initiated, user: dialstring 9427624
    ~ 1953: TTY38 Callback process before disconnect- modemcheck status=20090081
    ~
    ~ Platform: cisco 2621, NM-8A/DM, modem firmware source: IOS.
    ~
    ~ Any ideas what this message means and how to fix the problem?
    ~
    ~ Downgrading to 12.2(27) does fix the problem with callback (this means
    ~ the callback configuration is correct), but a downgrade is not desirable
    ~ as 12.2(27) has other bugs.

    This looks to be CSCsc43163, fixed in 12.4(09)T04 12.4(11)T02 12.4(13.12)T.
    If you need the fix in 12.2M, then I'd recommend opening a TAC case and getting
    the DEs to patch in the fix.

    Aaron
     
    Aaron Leonard, Jun 26, 2007
    #2
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  3. CSCsc43163 is first found in 12.4T
    How come that I was hit in 12.2(46) ?

    Thank you for your input.
     
    Victor Sudakov, Jun 27, 2007
    #3
  4. ~ > ~ After IOS upgrade from 12.2(27) to 12.2(46) callback stopped working
    ~ > ~ with the following message:
    ~ > ~
    ~ > ~ 1951: TTY38 Callback PPP process creation
    ~ > ~ 1952: TTY38 Callback process initiated, user: dialstring 9427624
    ~ > ~ 1953: TTY38 Callback process before disconnect- modemcheck status=20090081
    ~ > ~
    ~ > ~ Platform: cisco 2621, NM-8A/DM, modem firmware source: IOS.
    ~ > ~
    ~ > ~ Any ideas what this message means and how to fix the problem?
    ~ > ~
    ~ > ~ Downgrading to 12.2(27) does fix the problem with callback (this means
    ~ > ~ the callback configuration is correct), but a downgrade is not desirable
    ~ > ~ as 12.2(27) has other bugs.
    ~
    ~ > This looks to be CSCsc43163, fixed in 12.4(09)T04 12.4(11)T02 12.4(13.12)T.
    ~ > If you need the fix in 12.2M, then I'd recommend opening a TAC case and getting
    ~ > the DEs to patch in the fix.
    ~
    ~ CSCsc43163 is first found in 12.4T
    ~ How come that I was hit in 12.2(46) ?

    My guess is that whatever bugfix it was that caused CSCsc43163 to appear
    in 12.4T finally got committed to 12.2M some time between 12.2(27) and 12.2(46).

    Regards,

    Aaron
     
    Aaron Leonard, Jun 28, 2007
    #4
  5. Do you mean there is absolutely no luck for me trying anything between
    12.2(46) and 12.4(09)T04 ?
     
    Victor Sudakov, Jun 29, 2007
    #5
  6. No, it means that the same change was made to 12.2 between 12.2(27) and
    12.2(49), and to 12.4T as well. It may have gone into 12.3, 12.3T etc. as
    well.

    Releases in any of the trains before that point will be ok. There isn't
    an unbroken line of descent from 12.2(49) to 12.4(09)T04. it's more
    complicated than that.

    See White Paper: Cisco IOS Reference Guide
    http://www.cisco.com/en/US/products/sw/iosswrel/ps1828/products_white_paper09186a008018305e.shtml
     
    Martin Gallagher, Jun 30, 2007
    #6
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