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Router keeps disconnecting from the internet

Discussion in 'Routing & Switching' started by Stoney, Feb 4, 2008.

  1. Stoney

    Stoney Megabyte Poster


    I have a cisco 857w router installed in our office on our backup ADSL line. It was working fine for ages but now it keeps dropping the internet connection. Sometimes it doesn't connect all day, sometimes it's not a problem.

    I have plugged in a spare Netgear ADSL router when the Cisco wont connect and it picks up the internet connection immediately, so this makes me think the issue is with the router and not the ADSL line.

    I have run debug atm events on the router and the output is below. I haven't been able to find much information to decipher the error messages so if anyone knows of a resource that may help, that would be great.

    Here's the output of debug atm events;

    006193: *Feb 4 16:37:07.859 UTC: DSL: Send ADSL_OPEN command.
    006194: *Feb 4 16:37:07.859 UTC: DSL(ATM0): Using subfunction 0x0
    006195: *Feb 4 16:37:07.859 UTC: LOCAL:Max noise margin for power cutoff 31
    006196: *Feb 4 16:37:07.859 UTC: DSL(ATM0): Sent extended command 0x3
    006197: *Feb 4 16:37:10.359 UTC: DSL(ATM0): 1: Modem state = 0x9
    006198: *Feb 4 16:37:12.859 UTC: DSL(ATM0): 2: Modem state = 0x9
    006199: *Feb 4 16:37:15.359 UTC: DSL(ATM0): 3: Modem state = 0x10
    006200: *Feb 4 16:37:17.859 UTC: DSL(ATM0): 4: Modem state = 0x10
    006201: *Feb 4 16:37:20.359 UTC: DSL(ATM0): 5: Modem state = 0x10
    006202: *Feb 4 16:37:20.707 UTC: DSL: Received response: 0x22
    006203: *Feb 4 16:37:20.707 UTC: DSL: Open failed: Error in early non-CRC messa
    ge or in first CRC-covered message -- retrying
    006204: *Feb 4 16:37:20.707 UTC: sleep 5 seconds

    It just keeps outputting this block of messages when it tries to connect.

    Does anyone know what Response 0x22 means?? :blink

    Any help would be greatly appreciated.

    Certifications: 25 + 50 metre front crawl
    WIP: MCSA - Exam 70-270
  2. Modey

    Modey Terabyte Poster

    Check if there is a newer firmware version from Cisco and update it. Might be worth a try.
    Certifications: A+, N+, MCP, MCDST, MCSA 2K3, MCTS, MOS, MTA, MCT, MCITP:EDST7, MCSA W7, Citrix CCA, ITIL Foundation
    WIP: Nada
  3. BosonMichael
    Highly Decorated Member Award

    BosonMichael Yottabyte Poster

    Perhaps change the dsl operating-mode from auto to something specific?
    Certifications: CISSP, MCSE+I, MCSE: Security, MCSE: Messaging, MCDST, MCDBA, MCTS, OCP, CCNP, CCDP, CCNA Security, CCNA Voice, CNE, SCSA, Security+, Linux+, Server+, Network+, A+
    WIP: Just about everything!
  4. Stoney

    Stoney Megabyte Poster

    Thanks Modey,

    I did update the firmware when I first installed the router. There is a new FW update but the release notes say it's not for general distribution, it has been developed for specific carriers. I'm still trying to find out exactly what carriers it is for.

    Thanks Boson,

    I'll try changing it to something else and see what happens.
    Certifications: 25 + 50 metre front crawl
    WIP: MCSA - Exam 70-270

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