Router question?

Discussion in 'Windows Desktop Systems' started by Eagle710, Oct 27, 2007.

  1. Eagle710

    Eagle710 OSNN Senior Addict

    Messages:
    312
    Location:
    Toronto, Ontario, Canada
    How would i copy an IOS image from the flash of the router to a tftp server on a 2600 series router?

    i try this

    Router#copy flash tftp
    ^ This guy is under the flash option
    % Invalid input detected at '^' marker.
     
    Last edited: Oct 27, 2007
  2. gh057

    gh057 w3lc0m3 t0 7h3 r3al w0r1d

    Messages:
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    Location:
    nyc
    Its possible that you have space between flash and tftp or after . Try it again with out hitting space bar after tftp.

    also try using the command completion by hitting tab .

    ex:/ copy [tab] f[tab]

    if that doesn't work try to use the help feature

    ex:/ copy ?
    should give you a list of commands you can use in privilege mode
     
  3. Eagle710

    Eagle710 OSNN Senior Addict

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    Location:
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    Actually yeah i noticed that the copy command doesnt allow for the copy FLASH tftp .... it doesnt allow for the FLASH part but the CISCO lab says to do that way....????
     
  4. celticfan11

    celticfan11 Moderator

    Messages:
    744
    Location:
    Vernon, CT
    i logged into an older 1800 seriers router and copy flash tftp will do the trick on that series, so it sounds like your doing it correctly.
     
  5. Eagle710

    Eagle710 OSNN Senior Addict

    Messages:
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    Location:
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    Yeah i was trying it from a 2600 series so i will try a low grade 1700 series router for the heck of it.... maybe the labs are outdated... thanx ill let you know
     
  6. celticfan11

    celticfan11 Moderator

    Messages:
    744
    Location:
    Vernon, CT
    The cisco forums are also really good at getting cisco answers
     
  7. Eagle710

    Eagle710 OSNN Senior Addict

    Messages:
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    Location:
    Toronto, Ontario, Canada
    Another router question... im using Packet tracer and i configured a little network from one host machine i open up the browser and put the ip of the interface on the router and it doesn't load anything any reason?
     
  8. celticfan11

    celticfan11 Moderator

    Messages:
    744
    Location:
    Vernon, CT
    does this router support gui?
     
  9. Eagle710

    Eagle710 OSNN Senior Addict

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    Whats the Cisco Router command to enable the Web browser to display settings on the router????
     
  10. fitz

    fitz Just Floating Along Staff Member Political User Folding Team

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    Location:
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    from the config terminal
    Code:
    ip http server
    edit: assuming the router supports it
     
  11. Eagle710

    Eagle710 OSNN Senior Addict

    Messages:
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    Location:
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    Thanks got it working...
     
  12. Eagle710

    Eagle710 OSNN Senior Addict

    Messages:
    312
    Location:
    Toronto, Ontario, Canada
    What does a configuration register setting of 0x2102 indicate on a router?

    It tells the router to locate and load the IOS from NVRAM.
    It tells the router to locate and load the IOS from FLASH.
    It tells the router to bypass the configuration in NVRAM. *
    It tells the router to look in the startup configuration for boot system
    commands.

    is the question above correct if the answer(*) is what it states???

    I am confused by the meanings of each of these settings interm to Cisco Routers.... someone wanna explain it please.
     
  13. celticfan11

    celticfan11 Moderator

    Messages:
    744
    Location:
    Vernon, CT
    0x2102 is the defaults. It says that the router should boot from flash. You change the register to change how the router boots. For the most part you dont change this unless you need to do a password recovery or something else happens that is not good. :)
     
  14. Eagle710

    Eagle710 OSNN Senior Addict

    Messages:
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    Location:
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    So this really how the router will load the IOS??? Nothing to do with the CONFIG FILE?
     
  15. celticfan111

    celticfan111 OSNN One Post Wonder

    Messages:
    8
    right
    it is really how it boots. When you do a password recovery you boot into rommon then change the register to boot the device and bypass the config file.
     
  16. Eagle710

    Eagle710 OSNN Senior Addict

    Messages:
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    Location:
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    OK i always thought it had something to do with the config file

    so 0xabc0 --> use ROMmon mode
    0xabc1--> first IOS image in flash use
    0xabc2->0xabcF --> examines flash for image and boots into config??? so that means 0x2142 is in this category?
     
  17. celticfan11

    celticfan11 Moderator

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    744
    Location:
    Vernon, CT
  18. Eagle710

    Eagle710 OSNN Senior Addict

    Messages:
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    Location:
    Toronto, Ontario, Canada
    ACL for cisco routers??? Stumped on this ascenario.

    Internet (network 192.168.25.0/24) should be block any ICMP echo packets into the internetwork basically blocking a Ping of Death Attack

    Also Stop the "directed broadcast", stop all IP packets from entering the internetwork addressed to the directed broadcast address.
     
  19. celticfan11

    celticfan11 Moderator

    Messages:
    744
    Location:
    Vernon, CT
    access-list 101 deny tcp any 192.168.25.x eg icmp
    access-list 101 permit ip any any
    (x = ip address of that interface that connects to the .25 subnet.)


    Its been a while but this SHOULD work. But you may need to modify it if i made an error. You also have to apply this ACL on the IN bound port via "access-group 100 in" command on the interface that connects to the internet.

    What this will do is block any address with a sorce fo 25.x using the icmp protocol. The permit any is there becasuse all ACLs have a explicit deny any at the end of them unless otherwise specifiied. Remember to save config BEFORE editing.
     
  20. Eagle710

    Eagle710 OSNN Senior Addict

    Messages:
    312
    Location:
    Toronto, Ontario, Canada
    Is this correct in terms of Router methods?
    [FONT=&quot]o[/FONT]How IOS is located and loaded
    Uses Boot system commands
    Flash, TFTP, ROM

    [FONT=&quot]o[/FONT]How the router locates conf. files
    Uses settings set by config-register
    NVRAM, TFTP, Console