GroupStudy.com GroupStudy.com - A virtual community of network engineers
 Home  BookStore  StudyNotes  Links  Archives  StudyRooms  HelpWanted  Discounts  Login
RE: Redistribution posted 11/17/2006
[Chronological Index] [Thread Index] [Top] [Date Prev][Date Next] [Thread Prev][Thread Next]


Are your redundant links going to be off of the same router on your end, or
different routers?

If your redundant links are off of the same router (EIGRP's view) I would
suggest taking the simple way.  Originate a 0/0 route into EIGRP so that
your internal routers now have a way out.  Let BGP handle it's redundancy on
that single router so that you have centralized your decision making.

I agree with Brian that redistributing BGP into an IGP is generally not a
wise move.  Particularly if you have only one path out!  A router's
efficiency is very often linked to the size of its routing table.  So don't
make life overly complicated!  

Keep it simple!

 
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
IPExpert VP - Curriculum Development
IPExpert Sr. Technical Instructor
smorris@xxxxxxxxxxxx
http://www.ipexpert.com
 
 

-----Original Message-----
From: nobody@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] On Behalf Of
Brian McGahan
Sent: Friday, November 17, 2006 10:55 AM
To: tony hall; alexeim@xxxxxxxxxxxxxxx
Cc: ccielab@xxxxxxxxxxxxxx
Subject: RE: Redistribution

Tony,

	It depends on how big your BGP view is.  If it's a full view with
150,000 - 200,000 routes then you definitely do not want to redistribute it
into IGP.  If it is a much smaller subnet then maybe depending on your
internal routers' free resources.  You may also consider originating default
routes from your border routers into your EIGRP domain.  If you need more
specific traffic engineering then you can leak any specific routes you want
in from the BGP domain.  Also if you have firewalls on your edge or are
running NAT you need to take any asymmetrical routing into account otherwise
traffic flows could be dropped.


HTH,

Brian McGahan, CCIE #8593 (R&S/SP)
bmcgahan@xxxxxxxxxxxxxxxxxxxxxx 

Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
Outside US: 775-826-4344 x 705
24/7 Support: http://forum.internetworkexpert.com
Live Chat: http://www.internetworkexpert.com/chat/


> -----Original Message-----
> From: nobody@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] On Behalf
Of
> tony hall
> Sent: Friday, November 17, 2006 5:38 AM
> To: alexeim@xxxxxxxxxxxxxxx
> Cc: ccielab@xxxxxxxxxxxxxx
> Subject: Re: Redistribution
> 
> It is going to one SP but with redundent links for backup/loadshare.
> 
> 
> Tony.
> 
> 
> >From: Alexei Monastyrnyi <alexeim@xxxxxxxxxxxxxxx>
> >Reply-To: alexeim@xxxxxxxxxxxxxxx
> >To: tony hall <tony_hall123@xxxxxxxxxxxxx>
> >CC: ccielab@xxxxxxxxxxxxxx
> >Subject: Re: Redistribution
> >Date: Fri, 17 Nov 2006 11:36:12 +0100
> >
> >is it multi-homing or do you have only one connection to SP?
> >
> >A.
> >
> >tony hall wrote:
> >>Hi,
> >>I am running EIGRP internally and BGP externally with SP.What is the
> best
> >>way to obtain connectivity/reachibility in live network both way ,
I am
> >>currentlu running las follow,
> >>
> >>1- Redistribute static and connected into BGP and disable sync ,
> >>2- Redistribute BGP into EIGRP with metric 1500 1000 1 255 1500.
> >>
> >>Any better suggestion welcome?
> >>
> >>Regards,
> >>
> >>Tony.
> >>
> >>_________________________________________________________________
> >>Be the first to hear what's new at MSN - sign up to our free
> newsletters!
> >>http://www.msn.co.uk/newsletters
> >>
>
>>______________________________________________________________________
_
> >>Subscription information may be found at:
> >>http://www.groupstudy.com/list/CCIELab.html
> 
> _________________________________________________________________
> The new Windows Live Toolbar helps you guard against viruses 
> http://toolbar.live.com/?mkt=en-gb
> 
>
_______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

_______________________________________________________________________
Subscription information may be found at: 
http://www.groupstudy.com/list/CCIELab.html