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

Is it becoz of the same problem Bryan stated. One PE will discard the label
mappings sent by the HUB becoz it doesnt see the HUB as the next hop?

On Sat, Jan 23, 2010 at 12:24 AM, Joe Astorino <jastorino_at_ipexpert.com>wrote:

> Your customer routers will have routes but no reachability across the
> MPLS. Try running anything other than point-to-multipoint OSPF in the
> frame cloud as well.
>
> On Fri, Jan 22, 2010 at 1:49 PM, Divin Mathew John <divinjohn_at_gmail.com>
> wrote:
> > Wht will happen?
> >
> > On Sat, Jan 23, 2010 at 12:17 AM, Joe Astorino <jastorino_at_ipexpert.com>
> > wrote:
> >>
> >> 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
> >> >> >
> >> >> > Mailto: markom_at_ipexpert.com
> >> >> > Telephone: +1.810.326.1444
> >> >> > Fax: +1.810.454.0130
> >> >> > Community: http://www.ipexpert.com/communities
> >> >>
> >> >> --
> >> >> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
> >> >>
> >> >>
> >> >> Blogs and organic groups at http://www.ccie.net
> >> >>
> >> >>
> _______________________________________________________________________
> >> >> Subscription information may be found at:
> >> >> http://www.groupstudy.com/list/CCIELab.html
> >> >>
> >> >>
> >> >>
> >> >>
> >> >>
> >> >>
> >> >>
> >> >
> >> >
> >> >
> >> > --
> >> >
> >> > Sent from Bengaluru, Karnataka, India
> >> >
> >>
> >>
> >>
> >> --
> >> Regards,
> >>
> >> Joe Astorino CCIE #24347 (R&S)
> >> Sr. Technical Instructor - IPexpert
> >> Mailto: jastorino_at_ipexpert.com
> >> Telephone: +1.810.326.1444
> >> Live Assistance, Please visit: www.ipexpert.com/chat
> >> eFax: +1.810.454.0130
> >>
> >> IPexpert is a premier provider of Classroom and Self-Study Cisco CCNA
> >> (R&S, Voice & Security), CCNP, CCVP, CCSP and CCIE (R&S, Voice,
> >> Security & Service Provider) Certification Training with locations
> >> throughout the United States, Europe and Australia. Be sure to check
> >> out our online communities at www.ipexpert.com/communities and our
> >> public website at www.ipexpert.com
> >
> >
> >
> > --
> >
> > Sent from Bengaluru, Karnataka, India
> >
>
>
>
> --
> Regards,
>
> Joe Astorino CCIE #24347 (R&S)
> Sr. Technical Instructor - IPexpert
> Mailto: jastorino_at_ipexpert.com
> Telephone: +1.810.326.1444
> Live Assistance, Please visit: www.ipexpert.com/chat
> eFax: +1.810.454.0130
>
> IPexpert is a premier provider of Classroom and Self-Study Cisco CCNA
> (R&S, Voice & Security), CCNP, CCVP, CCSP and CCIE (R&S, Voice,
> Security & Service Provider) Certification Training with locations
> throughout the United States, Europe and Australia. Be sure to check
> out our online communities at www.ipexpert.com/communities and our
> public website at www.ipexpert.com
>

-- 
Sent from Bengaluru, Karnataka, India
Blogs and organic groups at http://www.ccie.net