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Some questions

Discussion in 'General Cisco Certifications' started by wizard, Aug 21, 2006.

  1. wizard

    wizard Petabyte Poster

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    So I don't clutter up the lab thread I have already started.

    Am I correct in assuming that you can hook up 2 routers together via the serial interface? Also I am assuming that you would have to assign a different IP adress to this interface than the one on the ethernet interface?

    I have got 2 2503 routers.
     
    Certifications: SIA DS Licence
    WIP: A+ 2009
  2. r.h.lee

    r.h.lee Gigabyte Poster

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    wizard,

    Yes, you can hook up 2 routers together via the serial interfaces. Make sure you're using an appropriate cable to connect the two serial ports.

    Yes, you would need to assign a different IP address to the serial interface that you would assign to the ethernet interface. That's because each interface, serial or ethernet, "belongs" to the sub/network that it is connected to. Let the router figure out how to route packets from one interface to the other.

    I hope this helps.
     
    Certifications: MCSE, MCP+I, MCP, CCNA, A+
    WIP: CCDA
  3. wizard

    wizard Petabyte Poster

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    Yes it does thanks :)

    I'll have some more questions down the line, just got to wait for the second switch I've ordered :)
     
    Certifications: SIA DS Licence
    WIP: A+ 2009
  4. wizard

    wizard Petabyte Poster

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    New question

    I now have 2 routers set up with the following IP addresses:

    192.168.1.1 - Ethernet0
    192.168.1.2 - Serial0

    192.168.2.1 - Ethernet0
    192.168.2.2 - Serial0

    So now how would I set up a route so 1.x can see 2.x and vice versa?

    I also have the Serial0 interfaces hooked up together
     
    Certifications: SIA DS Licence
    WIP: A+ 2009
  5. r.h.lee

    r.h.lee Gigabyte Poster

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    wizard,

    First, think of the router ports like a computer NIC. Imagine two computers connected by a cross-over cable. What must be the common factor of the IP addresses of both ends of the crossover cable?
     
    Certifications: MCSE, MCP+I, MCP, CCNA, A+
    WIP: CCDA
  6. wizard

    wizard Petabyte Poster

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    Okay I'll tackle that answer later.

    I have another problem I tried to issue the no shutdown command to Serial 0 on the 192.168.2.1 router, I am now getting the following error message:

    Code:
    192.168.2.0 overlaps with Ethernet0
    Serial0: incorrect IP address assignment
     
    Certifications: SIA DS Licence
    WIP: A+ 2009
  7. r.h.lee

    r.h.lee Gigabyte Poster

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    wizard,

    Actually, that's a confirmation of the reason for my question. By answering my question, you'll solve that problem too.
     
    Certifications: MCSE, MCP+I, MCP, CCNA, A+
    WIP: CCDA
  8. wizard

    wizard Petabyte Poster

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    Just one a little more digging one of the routers has to be set to DCE.
     
    Certifications: SIA DS Licence
    WIP: A+ 2009
  9. r.h.lee

    r.h.lee Gigabyte Poster

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    wizard,

    You are correct. How do you configure the serial interface to be the DCE?
     
    Certifications: MCSE, MCP+I, MCP, CCNA, A+
    WIP: CCDA
  10. wizard

    wizard Petabyte Poster

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    Okay it would seem that I have really jumped in further than I should have done at the moment. Been doing some more digging, it would seem I need other bits, so I'm going to take a step back and start from the beginning and actually start reading some CCNA material instead of appearing to be stumbling around. Thanks for the help so far, more questions will follow soon. :D
     
    Certifications: SIA DS Licence
    WIP: A+ 2009

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