From: Peter van Oene (pvo@xxxxxxxxxxxx)
Date: Tue Mar 12 2002 - 23:09:57 GMT-3
It isn't actually possible to synchronize, nor do any transit providers. I
expect it's been universally disabled since 93-94 area.
At 06:17 PM 3/12/2002 -0600, MADMAN wrote:
> Is it even any longer possible to synchronize, I don't think any IGP
>could handle the injection of 100K+ routes!! Seems like outdated
>attribute of BGP and should just as well be disabled by default.
>
> Dave
>
>Peter van Oene wrote:
> >
> > It is always wise to keep in mind the reasons various options exist in the
> > first place. IE, what problems where the designers trying to solve. Route
> > Reflection deals with peering in a topology that is fully meshed from an
> > IBGP perspective. Synchronization deals with route advertisement in a
> > topology that does not have a full IBGP mesh. Hence, these options are
> > designed for different networks and not likely to work well
> > together. Further, they shouldn't work together nor is there any sound
> > reason to try and make them work together.
> >
> > At 01:15 AM 3/13/2002 +0800, kenairs wrote:
> > >Hi ,
> > >So in others words, aparting from redistribute into IGP , RR will only
> works
> > >if you have turn off syn.
> > >Am i correct ?
> > >
> > >Or is there any other way beside redistributing to IGP ?
> > >
> > >----- Original Message -----
> > >From: Sandro Ciffali <sandyccie@yahoo.com>
> > >To: kenairs <kenairs@hotmail.com>
> > >Cc: <ccielab@groupstudy.com>
> > >Sent: Wednesday, March 13, 2002 12:38 AM
> > >Subject: Re: BGP RR
> > >
> > >
> > > > Since you have sync on, Network advertize by R2 on bgp
> > > > will go into R1's routing table only if it is recd.
> > > > both on BGP and IGP, Only then R1 will advertize that
> > > > network to R3.
> > > > If you turn off the sync on R1 then you will see it
> > > > being advertized to R3.
> > > > Or else redistribute the ethernet on R2 into your
> > > > igrp.
> > > >
> > > > Sandro
> > > > --- kenairs <kenairs@hotmail.com> wrote:
> > > > > Hi ,
> > > > > From the Cisco CD , is states the below
> > > > >
> > > > > When the route reflector receives an advertised
> > > > > route, depending on the
> > > > > neighbor, it does the following:
> > > > >
> > > > >
> > > > > a.. A route from an external BGP speaker is
> > > > > advertised to all clients and
> > > > > nonclient peers.
> > > > >
> > > > >
> > > > > b.. A route from a nonclient peer is advertised to
> > > > > all clients.
> > > > >
> > > > >
> > > > > c.. A route from a client is advertised to all
> > > > > clients and nonclient peers.
> > > > > Hence, the clients need not be fully meshed.
> > > > > Here is my topology,
> > > > >
> > > > > R1
> > > > > | |
> > > > > | |
> > > > > | |
> > > > > R2 R3
> > > > >
> > > > > All routers are able to reach each other through IGP
> > > > > ( eigrp ) . R1 is the RR
> > > > > R2 and R3 is the client.
> > > > >
> > > > > Now, R2 has a E0 . It then have a network command
> > > > > under BGP and is propagrate
> > > > > to R1.
> > > > > But R1 does not advertised the route to R3 ..
> > > > > Why is this so ?
> > > > > All routers are syn enabled.
> > > > >
> > > > >
> > > > > but is R2 received a route from another AS, the
> > > > > route will be advertised to
> > > > > R3.
> > > > >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:57:02 GMT-3