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  1. Senior Member
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    May 2017
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    Southeast
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    #1

    Default Cisco 2511 Access Server Issue: Router(boot) mode....

    So I've changed the config-register to 0x2142 from 0x2102 and it's still booting into (boot) mode.

    Here is my #show version output:

    Router(boot)#show ver
    Cisco Internetwork Operating System Software
    IOS (tm) 3000 Bootstrap Software (IGS-RXBOOT), Version 10.2(8a), RELEASE SOFTWARE (fc1)
    Copyright (c) 1986-1995 by cisco Systems, Inc.
    Compiled Tue 24-Oct-95 15:46 by mkamson
    Image text-base: 0x01020000, data-base: 0x00001000


    ROM: System Bootstrap, Version 5.2(8a), RELEASE SOFTWARE


    Router uptime is 9 minutes
    System restarted by power-on
    Running default software


    cisco 2511 (68030) processor (revision D) with 16380K/2048K bytes of memory.
    Processor board serial number 04189220 with hardware revision 00000000
    X.25 software, Version 2.0, NET2, BFE and GOSIP compliant.
    1 Ethernet/IEEE 802.3 interface.
    2 Serial network interfaces.
    16 terminal lines.
    32K bytes of non-volatile configuration memory.
    8192K bytes of processor board System flash (Read/Write)


    Configuration register is 0x2142

    Here is #show flash:

    Router(boot)#show flash


    System flash directory:
    File Length Name/status
    1 7392272 /c2500-p-l.120-7.T.bin [invalid checksum]
    [7392336 bytes used, 996272 available, 8388608 total]
    8192K bytes of processor board System flash (Read/Write)
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  3. Senior Member
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    Sep 2014
    Location
    Minnesota
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    Certifications
    CCNA:R&S, VCA6-DCV, Sec+
    #2
    Basically, the (boot) ios is rommon. it is a dumbed down ios that can be used to find out why your router isn't booting.

    In your case, the one and only ios installed on the router has become corrupted, [invalid checksum].
    So, you need to install a good ios. and, the ios is put on the flash. therefore, you will need a version that is less than 8mb in size.
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  4. Senior Member
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    Sep 2004
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    New York
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    Certifications
    MS IT, BS IT, CCIE R&S, CCNP, CCDP, CISSP, Sec+, VCA6-DCV, VCA6-NV
    #3
    It shows 8MB of flash. Did it have two 8MB sticks of flash and one of them is corrupt. The 2500 series combines both flash sticks into one file system.

    I think the T train IOS you are using was bigger than 10MB.
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  5. Senior Member
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    May 2017
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    #4
    I've been in rommon mode in other devices, I've just never seen the (boot) mode. So I can find another 8MB< IOS and load on it?
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  6. Senior Member
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    Sep 2004
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    New York
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    Certifications
    MS IT, BS IT, CCIE R&S, CCNP, CCDP, CISSP, Sec+, VCA6-DCV, VCA6-NV
    #5
    Yeah, you can load a smaller IOS. Maybe open up the case and check the seating of the flash sticks. Then format the flash.

    it could could be that one has popped loose or is mis seated and re seating it will fix the problem.
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  7. Senior Member
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    May 2017
    Location
    Southeast
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    #6
    Ok, I'll check that. Just sucks to get this thing shipped to me and now I have to mess around with IOS issues. Oh well, I'm still learning about troubleshooting Boot/IOS issues!
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