From: Frank (ocsic@web.de)
Date: Fri Sep 01 2006 - 02:13:05 ART
Alex De Gruiter (AU) schrieb:
Thanks for answering.
That helped a lot. I was just wondering how to find out these adresses.
It could be
any address. Ok, normaly it's something that end on .1, but i was asking
myself,
if i can rely on the assumption on the lab.
So as i underastand you, i will check which routes are at the
boarderrouter and
check if i can reach hosts from within the internel network to the boarders.
Frank
> With regards question (2), personally I think that ping isn't always a
> great tool to test reachability - there's really no way of knowing if
> ping is blocked along the path (speaking real-world here, rather than
> lab, I know).
>
> Especially in your scenario, when you have no knowledge of the hosts
> available, "show ip route <route>" on the border router would suffice
> IMHO. Unless you know a specific host, I doubt that you'd be expected to
> ping the entire range.
>
> What I'd do, if given a specific destination, say 222.22.2.1, is try to
> ping that destination. If that works, and you are expected to route to
> the entire /24, then do a "show ip route 222.22.2.1". You should find
> that the route taken is a /24.
>
> With question (1) I'd say it depends on the scenario. Ask the proctor
> for clarification on your requirements.
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Frank
> Sent: Sunday, 27 August 2006 6:25 PM
> To: Cisco certification
> Subject: Connectivity at network boarders
>
> Hi,
>
> i'm playing with redistribution and trying to solve questions from the
> ie
> workbook. When they want redistribution and state
>
> "to obtain reachability to all advertised networks"
>
> does that mean, also to networks from neighbors BB1, BB2, BB3 or
> do they only mean full reachability among the internal routing
> domains?
>
> In some cases this works and in others not. I would say, it depens
> on the BB Routers. They need a route back to the "internal" network.
>
> As i know, i have no access at all to the BB routers, i would say, i
> can't
> provide reachability there, i can only check if routers are reachable
> at the network boarder.
> So if i can ping BB1 from a boarder router next to, but can not ping
> from
> the internal network, or a traceroute stops at the boarder, i can't do
> much more. Is that right? Or is therer more to check and to do?
>
> Also, sometimes they distribute routes into the network like:
> 222.22.2.0/24. How would i know to check reachability? Do
> i habe to "test" all ip addresses from 222.22.2.1-254? How to
> i find out which address to test?
>
> Thanks in advance.
>
>
> Frank
>
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