Correct but also remember that it's only for routes received from iBGP peers
not eBGP peers.
There really is a lot of confusion about when to use or not use
synchronization much less what routes it affects. I spend extra time in the
Advanced BGP class that I teach ensuring that the students fully understand
synchronization.
Brian Dennis
CCIE #2210 (R&S)(ISP/Dial)
CCSI #98640
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Ahmed Aden
Sent: Wednesday, February 14, 2001 9:54 AM
To: Brian Dennis
Cc: Rodgers Moore; [EMAIL PROTECTED]
Subject: RE: bgp questions
Thanks for the clarification. So with 'no synchronization' set, every
peer who RECEIVES that route doesn't have to verify if there is an igp
route to
it, but the originator still checks before advertising it?
On Wed, 14 Feb 2001, Brian Dennis wrote:
> Sychonization only comes into play when a BGP route is learned from an
iBGP
> peer. If you are the origniator of the route you must have an IGP route.
> Disabling synchonization won't affect the originator of the route.
>
> Brian Dennis
> CCIE #2210 (R&S)(ISP/Dial)
> CCSI #98640
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
> Ahmed Aden
> Sent: Wednesday, February 14, 2001 8:36 AM
> To: Rodgers Moore
> Cc: [EMAIL PROTECTED]
> Subject: Re: bgp questions
>
>
>
> Correct me if I'm wrong, but the only situation that bgp cares about IGP's
> synchronization
> is when bgp is explicitly configured to announce networks (i.e network
> x.x.x.x mask x.x.x.x) and it would have to check the igp to see if there
> is a valid route to that network. This can be overridden by 'no
> synchronization'. However, the default behavior is that bgp announces
> active (I'm not sure what activate means) routes (routes which are
> reachable via an IGP's routing table) to all configured bgp peers
> irrespective of whether
> they are an ibgp or ebgp peer. For this reason, I would select A. It's
> still very poorly worded, assuming 'activate' is not a typo.
>
> hope this helps
>
>
> On Wed, 14 Feb 2001, Rodgers Moore wrote:
>
> > Yuck, really bad question. No frame of reference, no nothin. What is a
> > activate route anyway? Active route?
> >
> > I think the key to answering this question is the question: when would
BGP
> > not report an active route? When BGP and the IGP are not in sync, then
an
> > active route would not be reported.
> >
> > I say "D" is the most likely suspect, although I would change BGP to
EBGP.
> >
> > Rodgers Moore
> >
> > ""Howard C. Berkowitz"" <[EMAIL PROTECTED]> wrote in message
> > news:p05001900b6aff192dfe7@[63.216.127.98]...
> > > >I would choose D , correct me if I am wrong
> > > >--- David Tran <[EMAIL PROTECTED]> wrote:
> > > >> I have this question on my cisco prep exam
> > > >> fill-in-the-blank. Please =
> > > >> help.
> > > >>
> > > >> A BGP router reports all activate routes based from
> > > >> BGP ______. This is =
> > > >> the default policy action for BGP routers.
> > > >>
> > > >> A. to all BGP peers
> > > >> B. to all IBGP peers
> > > >> C. to all EBGP peers
> > > >> D. and the IGP's configured on the router to all BGP
> > > >> peers
> > > >>
> > > >> I select choice a. Is it correct?
> > > >>
> > > >> David Tran
> > > > > [EMAIL PROTECTED]
> > > > >
> > >
> > >
> > > It's a poorly written question. If I was forced to pick, but I don't
> > > understand the first sentence.
> > >
> > > _________________________________
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> > >
> >
> >
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>
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