Re: Is there a methodical way to check full reachability?

Or you can use the thoughtfull (sp?) way of verifying that all your
networks have indeed routes in all your routers, and that you have
no routing (change) activity (i.e. debug routing).

It is not that hard to learn how to check if a route is present in a
routing table, and it can be faster than waiting for pings.

GS history is full of info on the topic.

-Carlos

Joe Astorino @ 21/01/2010 11:32 -0300 dixit:
> Here is my method for this: Obviously you are going to write a TCL
> script and paste it into all devices. It will look something like
> this:
>
> tclsh
> foreach ccie {
> 1.1.1.1
> 2.2.2.2
> 3.3.3.3
> 4.4.4.4
> 5.5.5.5
> 6.6.6.6
> } { ping $ccie re 2 so lo0}
>
> Now...as far as what addresses to put into that script, I like to
> start at the upper left side of my diagram and just put in every
> SINGLE IP address I have in my network...every interface. Run your
> script on every router and you are good! If you don't know TCL for
> this purpose, you need to learn it!!!!! : )
>
> On Thu, Jan 21, 2010 at 9:24 AM, <groupstudy_at_nyms.net> wrote:
>> Guys,
>> I always have trouble when I get asked to "check reachability in the enterprise network". To me, this implies I have to check every node can reach every over node on the network. Having to note down the contents of the routing table on each device and comparing them all manually to see if anythings missing, let alone ensuring reachability to each node on each network is a mammoth task! Is there some quick methodical process to do this without getting overwhelmed? I'd like to hear how people achieve this very important task.
>> Thanks in advance!
>> Joe
>>
>>
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-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net