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

Indeed....using MPLS and having a broken LSP somewhere in the middle
can result in having routes but no reachability : ) Try running MPLS
L3 VPN with OSPF over frame-relay in your SP "core" and make your PE
loopbacks /24s and see what happens : )

On Fri, Jan 22, 2010 at 1:18 PM, Divin Mathew John <divinjohn_at_gmail.com> wrote:
> R1--- r2--- R3
> R1 thinks R2 is next hop for R3 Lo0. and R2 Thinks R1 is next hop for R3'
> Lo0
>
>
> On Fri, Jan 22, 2010 at 10:27 PM, Carlos G Mendioroz <tron_at_huapi.ba.ar>
> wrote:
>>
>> Would you please show a simple example where you have routes and
>> not reachability ? Obviously without ACLs blocking traffic.
>>
>> -Carlos
>>
>> Marko Milivojevic @ 22/01/2010 8:54 -0300 dixit:
>> > On Thu, Jan 21, 2010 at 23:51, Carlos G Mendioroz <tron_at_huapi.ba.ar>
>> > wrote:
>> >> 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).
>> >
>> > Having routes in the routing table does not mean reachability :-).
>> >
>> > Having pings working, doesn't mean full routing convergence :-).
>> >
>> > --
>> > Marko Milivojevic - CCIE #18427
>> > Senior Technical Instructor - IPexpert
>> >
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>> > Telephone: +1.810.326.1444
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>> --
>> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
>>
>>
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>>
>
>
>
> --
>
> Sent from Bengaluru, Karnataka, India
>

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