877 ADSL

Discussion in 'Cisco' started by Supersleuth, Oct 6, 2011.

  1. Supersleuth

    Supersleuth Guest

    I have just loaded an 877 with 15.1 IOS


    the config is the same as i was using with 12.4

    If the is no traffic through the modem for about 10 mins the ATM seems
    to go to sleep.

    ping atm int a0 0 34 seg give no response

    I can issue the " shut" "no shut" command to int ATM0 but this doesnt

    Also tried disconnecting the DSL cable waiting 1 minute then plugging
    back in

    Only way to get the ATM working is to reload the 877

    With 12.4 i didnt have this problem, and i had ADSL firmware 4.0.15
    loaded (adsl_alc_20190.bin)

    Is there something new in 15.1 i am missing to keep it alive

    interface ATM0
    description Physical ADSL (ATM) interface
    no ip address
    no atm ilmi-keepalive
    interface ATM0.1 point-to-point
    description Virtuele ADSL sub-interface
    ip address dhcp
    ip nat outside
    ip virtual-reassembly in
    atm route-bridged ip
    pvc 0/34
    encapsulation aal5snap
    Supersleuth, Oct 6, 2011
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  2. Supersleuth

    Supersleuth Guest


    I found the the 877 just randomly hangs a hard reset is need to get
    the ADSL working again.

    I returned to 12.4(24) and so far it works fine again

    Looks like 15.1 needs a lot of working on. I'll wait a few month and
    try a newer version and trst that.

    If any Cisco firmware guys read this and want more info i'll be only
    too happy to help.
    Supersleuth, Oct 9, 2011
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  3. Supersleuth

    fote98cisco Guest


    Interesting ...

    Find below cropped output of my 876W. Never had this problem. I'm running it this way for months.


    System image file is "flash:c870-adventerprisek9-mz.151-4.M.bin"
    Cisco 876W (MPC8272) processor (revision 2.0) with 236544K/25600K bytes of memory.
    53248K bytes of processor board System flash (Intel Strataflash)
    fote98cisco, Oct 9, 2011
  4. I am using 15.1(2)T1 and 4.0.210 ADSL firmware and it is fine. I do
    have maxed out RAM fitted, so maybe 15.1 needs more RAM?
    Stephen Worthington, Oct 10, 2011
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