Re: BGP and AS loop prevention

Thanks Narbik.

With these same two routers I am now playing with track objects. I created
an HSRP group, and am watching for routes with a track object. I will try
with IPSLA in a few ... I need to practice the commands for starting
schedules.

Last night with these two routers I worked any and every NTP thing I could
think of. I had an ASET lab today, and wouldn't ya know it? NTP w/
authentication was there.

You can do a lot with only two routers ;-)

lol ... sounds like a tour book "road to CCIE on only $5 a day" ...

On Mon, Oct 19, 2009 at 11:59 PM, Narbik Kocharians <narbikk_at_gmail.com>wrote:

> Good one Andrew.
>
> On Mon, Oct 19, 2009 at 8:58 PM, Narbik Kocharians <narbikk_at_gmail.com
> >wrote:
>
> > For the "Show ip bgp neigh xxxx received-routes" to work, you must
> > pre-configure the routers using the "Neighbor xxxx Soft-reconfiguration
> in".
> > Do you have that configured? If NOT, then just use "route" instead of
> > "received-route". did you do a "clea ip bgp neigh xx in".
> > It would help for us to see the config.
> >
> > On Mon, Oct 19, 2009 at 8:46 PM, Johnny B CCIE <jbccie_at_gmail.com>
> wrote:
> >
> >> Nate,
> >>
> >> Do you think there is a reason that the AS100 will not accept another
> >> AS100 sending it prefixes? Think about for a moment. What does a BGP
> >> Speaker do with prefixes if it thinks they came from somewhere else?
> >> Now ask yourself can you change this behavior and if you can then how
> >> will you do it?
> >>
> >> On Mon, Oct 19, 2009 at 11:12 PM, Nate Lee <natetlee_at_gmail.com> wrote:
> >> > I have a scenario labbed up where I have an discontiguous BGP AS
> split
> >> by
> >> > another AS, something like this: (AS100) <> (AS 200) <> (AS 100).
> >> >
> >> > I am trying to get the prefixes on the AS 100 routers to show up in
> each
> >> > others BGP tables. I have implemented the neighbor x.x.x.x allowas-in
> >> > command on the AS 100 routers on their neighbor statements facing the
> AS
> >> 200
> >> > routers but it does not seem to work. When I do a SHOW IP BGP NEIGH
> >> x.x.x.x
> >> > ADVERTISED-ROUTES on the AS 200 routers, I see that the AS 200 router
> >> will
> >> > not send the route that originated in the far side AS 100.
> >> >
> >> > Is there some sort of configuration needed on the AS 200 routers to
> >> allow
> >> > them to send a route with an AS PATH that contains the AS they are
> >> sending
> >> > into? I was under the impression that they do not perform an outgoing
> >> AS
> >> > PATH check.
> >> >
> >> > Thanks!
> >> >
> >> > Nate
> >> >
> >> >
> >> > Blogs and organic groups at http://www.ccie.net
> >> >
> >> >
> _______________________________________________________________________
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> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
> > --
> > Narbik Kocharians
> > CCSI#30832, CCIE# 12410 (R&S, SP, Security)
> > www.MicronicsTraining.com <http://www.micronicstraining.com/>
> > Sr. Technical Instructor
> > YES! We take Cisco Learning Credits!
> > Training And Remote Racks available
> >
>
>
>
> --
> Narbik Kocharians
> CCSI#30832, CCIE# 12410 (R&S, SP, Security)
> www.MicronicsTraining.com
> Sr. Technical Instructor
> YES! We take Cisco Learning Credits!
> Training And Remote Racks available
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>
>

-- 
Andrew Lee Lissitz
all.from.nj_at_gmail.com
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