Re: BGP

Thanks guys..Appreciate all the inputs.

-raghav

On Mon, May 30, 2011 at 10:24 PM, Marko Milivojevic <markom_at_ipexpert.com>wrote:

> That's pretty much it, again :-). Joe covered with his answer what
> "bandwidth" does.
>
> However, when you look at alternate solutions, you may not need to
> touch BGP at all - as long as you control both sides of the link (as
> in a lab environment, for example).
>
> If you peer your BGP neighbors between Loopback interfaces, underlying
> protocol used to learn next-hop will be used for load-sharing and/or
> load-balancing. If that protocol supports unequal-cost load-sharing,
> you can perform unequal-cost load-sharing of BGP-learned routes,
> without ever touching any BGP attribute.
>
> This works only with two neighbors, though. As soon as you learn BGP
> prefix from different BGP neighbors, best path selection takes place.
>
> --
> Marko Milivojevic - CCIE #18427
> Senior Technical Instructor - IPexpert
>
> FREE CCIE training: http://bit.ly/vLecture
>
> Mailto: markom_at_ipexpert.com
> Telephone: +1.810.326.1444
> Web: http://www.ipexpert.com/
>
> On Mon, May 30, 2011 at 21:49, Raghav Bhargava
> <raghavbhargava12_at_gmail.com> wrote:
> > Marko,
> >
> > The reason why i asked about load balancing was that if suppose i have 2
> > equal paths to the same AS and i use this bgp dmz-link bw feature , then
> the
> > bandwidth that i configure under the physical interface is only a
> attribute
> > which i can use to do load balancing. Will it impact the actual bandwidth
> of
> > the link. Sorry but i have not tried this in lab at the moment but will
> > definitely try it. Also if we use this feature in a live network that
> means
> > i cannot use any other attribute in the same AS to modify the path for
> > example Local pref because to use this feature all the path selection
> > attribute should be default.Please correct me if i am wrong here.
> >
> > I was just trying to create different scenarios where if i use other BGP
> > attributes for path selection will this feature create a issue.
> >
> > As far as load sharing is concerned, please correct me here that for ebgp
> > links the cli is maximum-paths x and for ibgp links is maximum-path ibgp
> x.
> >
> > Thats all i know people. not much as you all but trying to learn a little
> > day by day. Once again thanks everyone for your valuable input.
> >
> > -Raghav
> >
> >
> >
> > On Mon, May 30, 2011 at 9:39 PM, Marko Milivojevic <markom_at_ipexpert.com>
> > wrote:
> >>
> >> That's pretty much it. Now, let's see how we can build on that... :-)
> >>
> >> What remains unclear? Are there any other options you can use for
> >> load-sharing and load-balancing of BGP-learned traffic other than
> >> these two you mentioned? Also, what are the requirements for either
> >> one to work?
> >>
> >> --
> >> Marko Milivojevic - CCIE #18427
> >> Senior Technical Instructor - IPexpert
> >>
> >> FREE CCIE training: http://bit.ly/vLecture
> >>
> >> Mailto: markom_at_ipexpert.com
> >> Telephone: +1.810.326.1444
> >> Web: http://www.ipexpert.com/
> >>
> >> On Mon, May 30, 2011 at 21:35, Raghav Bhargava
> >> <raghavbhargava12_at_gmail.com> wrote:
> >> > Hey garry,
> >> >
> >> > To answer your query , i did a little of bit research at my end but i
> >> > wanted
> >> > to know the answers from expert. Below is a short summary of load
> >> > balancing
> >> > & load sharing what i understand:
> >> >
> >> > Load balancing.
> >> >
> >> > To my understanding all the routing protocols do equal cost load
> >> > balancing
> >> > and it is only EIGRP that does unequal cost load balancing. But having
> >> > said
> >> > that BGP has a feature through which you can do unequal cost load
> >> > balancing.
> >> > the bgp dmz-link bw feature allows you to do unequal cost load
> >> > balancing.
> >> > Note cost in this will be the bandwidth that you configure under the
> >> > specific ebgp interface.
> >> >
> >> > Load sharing.
> >> >
> >> > Load sharing can be done via the maximum path command under BGP
> process
> >> >
> >> > Please feel free to chime in and ellaborate these if anyone wants.
> >> >
> >> >
> >> > On Mon, May 30, 2011 at 9:23 PM, garry baker <baker.garry_at_gmail.com>
> >> > wrote:
> >> >>
> >> >> maybe his yes and yes is just his way of saying, yes they sure do, to
> >> >> encourage you to do a little bit of digging on your own...
> >> >>
> >> >>
> >> >>
> >> >>
> http://www.cisco.com/en/US/docs/ios/iproute_bgp/configuration/guide/irg_multi_load_ps6441_TSD_Products_Configuration_Guide_Chapter.html
> >> >>
> >> >> --
> >> >> Garry L. Baker
> >> >>
> >> >> "With sufficient thrust, pigs fly just fine..." - RFC 1925
> >> >>
> >> >>
> >> >> On Tue, May 31, 2011 at 7:16 AM, Raghav Bhargava
> >> >> <raghavbhargava12_at_gmail.com> wrote:
> >> >>>
> >> >>> Hey Marko,
> >> >>>
> >> >>> Good to know yes for both of them in BGP. Can you please elaborate
> >> >>> your
> >> >>> solutions.
> >> >>>
> >> >>> -Raghav
> >> >>>
> >> >>> On Mon, May 30, 2011 at 8:59 PM, Marko Milivojevic
> >> >>> <markom_at_ipexpert.com>wrote:
> >> >>>
> >> >>> > 1. Yes.
> >> >>> >
> >> >>> > 2. Yes.
> >> >>> >
> >> >>> > --
> >> >>> > Marko Milivojevic - CCIE #18427
> >> >>> > Senior Technical Instructor - IPexpert
> >> >>> >
> >> >>> > FREE CCIE training: http://bit.ly/vLecture
> >> >>> >
> >> >>> > Mailto: markom_at_ipexpert.com
> >> >>> > Telephone: +1.810.326.1444
> >> >>> > Web: http://www.ipexpert.com/
> >> >>> >
> >> >>> > On Mon, May 30, 2011 at 20:49, Raghav Bhargava
> >> >>> > <raghavbhargava12_at_gmail.com> wrote:
> >> >>> > > Hey Experts,
> >> >>> > >
> >> >>> > > I have a question regarding BGP which is
> >> >>> > >
> >> >>> > > 1. Can we do load balancing in BGP ?
> >> >>> > >
> >> >>> > > 2. Load sharing ?
> >> >>> > >
> >> >>> > > I know this might have been repeated a lot many times but please
> >> >>> > > if
> >> >>> > someone
> >> >>> > > can shed some insight on this will be really great.
> >> >>> > >
> >> >>> > > --
> >> >>> > > Warm Regards
> >> >>> > > Raghav
> >> >>> > >
> >> >>> > >
> >> >>> > > Blogs and organic groups at http://www.ccie.net
> >> >>> > >
> >> >>> > >
> >> >>> > >
> >> >>> > >
> _______________________________________________________________________
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> >> >>> > >
> >> >>> > >
> >> >>> > >
> >> >>> > >
> >> >>> >
> >> >>>
> >> >>>
> >> >>>
> >> >>> --
> >> >>> Warm Regards
> >> >>> Raghav
> >> >>>
> >> >>>
> >> >>> Blogs and organic groups at http://www.ccie.net
> >> >>>
> >> >>>
> >> >>>
> _______________________________________________________________________
> >> >>> Subscription information may be found at:
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> >> >>>
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> >> >>>
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> >> >>
> >> >
> >> >
> >> >
> >> > --
> >> > Warm Regards
> >> > Raghav
> >> >
> >
> >
> >
> > --
> > Warm Regards
> > Raghav
> >
>

-- 
Warm Regards
Raghav
Blogs and organic groups at http://www.ccie.net