need a little rip help

Oct 16, 2006 3 Replies
B
need a little rip help open original image

I'm getting ready to recertify for CCNA for a job I might be getting and I'm kinda confused on something. This is all in a router sim, so that may be why it's not working. Anyways I setup this diagram to practice routing protocols. i enabled rip on all of the routers and told it which networks to advertise. but for some reason WS4 can't ping WS3 w/o having a static route setup on rtr-central. from ws4, i can ping all the way up to the serial interface on the right hand side of rtr-central. the other serial int on the router drops it. both links are up/up so im not sure. like i said making a static route on rtr-central to 10.100.30.0 solves the problem, but i'm not exactly sure why.



so if anyone can point me in the right direction id appreciate it



thanks



visio diagram

formatting link


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C

Kinda hard to help as you havn't provided any config or route info. Are we supposed to guess from the diagram what you have configured?

Start with a 'sh ip route' from all routers.

Chris.

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B

sorry about that. the reason I didn't post any config info is because I figured the problem was because of me not fully understanding the login behind how routing protocols work. I thought the answerr would be something along the lines of rip works ok, except under certain conditions; and my diagram met those conditions. I'm at work now, but when I get home I'll do a sh ip ro from all of the routers.

thanks

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B

Perhaps this is where your confusion is. When configuring RIP, you don't tell it which networks to advertise, you tell it which networks to send/receive advertisements on. I.e.

router rip network 192.168.1.0

doesn't mean "advertise 192.168.1.0/24", it means "send and receive advertisements through interfaces connected to 192.168.1.0/24".

This is an annoying inconsistency between Cisco's configuration language for different protocols. When configuring BGP, the network statement

*does* tell it what to advertise.
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