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Cisco 877w WAN config

Discussion in 'Routing & Switching' started by Robt800, Mar 13, 2011.

  1. Robt800

    Robt800 Bit Poster

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    Hi,

    I'm trying to learn how to configure an 877w simply through the CLI. Obviously I've come up against a few hickups. Whilst Im aware of some security issues with my config (no access list to protect access to router etc.) - I've simply focused on getting a simple working config. Because I would be using this in an office environment, I've disabled DHCP.

    The issue I have at the moment is I cant access the internet through my orange broadband.

    I've attached my config if someone could spare me a little time to see if anything stands out.

    Thanks a lot
     

    Attached Files:

  2. keconnect sparky

    keconnect sparky Nibble Poster

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    Does the Router successfully negotiate a PPP session?
    # Is the CD light on the router flashing green or on solid?
    # Is the PPP light a solid green light on the router ?

    If the above lights are on;
    # Can you ping from the CLI on the router any external IP addresses?
    # Can the client PCs ping the router? or ping any websites via IP?

    if not you need to add in your config;
    ip domain-lookup
    ip name-server <ISP's DNS server 1>
    ip name-server <ISP's DNS server 1>
     
    Certifications: MCP, CCENT, CCNA, CCNA-S
    WIP: CCNP (ROUTE)
  3. Robt800

    Robt800 Bit Poster

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    Thanks for coming back,

    the CD light is solid on the router, however the PPP light isn't on.

    I can ping external website addresses from the CLI, but only by using the ip address of the website, i.e. the cli will not resolve.

    If I place an external DNS address in the clients windows network settings, then I can surf the net.

    I added your commands below, but it appears to have had little effect.

    Thanks

    Rob
     
  4. keconnect sparky

    keconnect sparky Nibble Poster

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    Odd that the PPP light is not on at all?!?! yet the clients connected to this subnet have internet access..... The clients are defiantly connected to the Cisco router?

    So, next to your CD light, are a txd and rxd light, are these flashing when the clients/something accesses the internet?

    the commands:
    ip domain-lookup
    ip name-server <ISP's DNS server 1>
    ip name-server <ISP's DNS server 1>

    Will allow your CLI to resolve hostnames only from the router, since you are not handing out a DHCP Pool you cannot automatically pass this information on to your hosts, so as you say you have to resort to hard-coding it on the NIC on the hosts.
     
    Certifications: MCP, CCENT, CCNA, CCNA-S
    WIP: CCNP (ROUTE)
  5. Robt800

    Robt800 Bit Poster

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    just booted up the router again tonight - not sure if I didn't give it long enough yesterday after submitting the commands as it now definatley resolves names from the CLI.

    Clients are definatley connected just to the cisco & the PPP light isn't on.

    The txd and rxd do flash in line with internet activity

    Is there a way to point the DNS on the client NIC to the router & have the router resolve names for the clients? Sure there must be as the Draytek we use at work does this (without using DHCP)

    I greatly appreciate the help

    Rob
     
    Last edited: Mar 23, 2011
  6. keconnect sparky

    keconnect sparky Nibble Poster

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    The commands you have entered already above, will allow your router to resolve hostnames (as you've tested yourself) so all you have to do is point you client PCs DNS to your routers IP (the IP of the LAN interface that the PCs are on).
     
    Last edited: Mar 24, 2011
    Certifications: MCP, CCENT, CCNA, CCNA-S
    WIP: CCNP (ROUTE)
  7. Robt800

    Robt800 Bit Poster

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    yep thats just what I thought - but really strange - I've just tested the cli again & can still resolve names. Problem is when I change the clients nic to use the DNS as the router (i.e. same as the gateway address - 192.168.3.2) I cannot resolve names.

    I tested this at the basic level of trying to ping www.yahoo.com and others from a cmd prompt and it couldn't obtain the corresponding ip address...

    Any suggestions?

    Thanks

    Rob
     
  8. keconnect sparky

    keconnect sparky Nibble Poster

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    ah, think we forgot to include the command:

    ip dns server

    in our config, my bad ..... this enables the DNS server within the router
     
    Certifications: MCP, CCENT, CCNA, CCNA-S
    WIP: CCNP (ROUTE)
  9. Robt800

    Robt800 Bit Poster

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    Mate - you're a star

    That sorted it

    Thank you for all the help

    Rob
     
  10. keconnect sparky

    keconnect sparky Nibble Poster

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    Thumbs up, no worries bud, thats what these forums are all about
     
    Certifications: MCP, CCENT, CCNA, CCNA-S
    WIP: CCNP (ROUTE)

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