[c-nsp] BGP conditional advertisement

Adam Greene maillist at webjogger.net
Thu Aug 29 09:48:24 EDT 2013


Ahmed, 

Our experience with conditional BGP and default BGP timers is that it can
take up to 3 minutes to converge.

Thanks,
Adam

-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of
Ahmed Hilmy
Sent: Wednesday, August 28, 2013 4:38 PM
To: Blake Dunlap
Cc: Gert Doering; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] BGP conditional advertisement

thanks


On Wed, Aug 28, 2013 at 11:29 PM, Blake Dunlap <ikiris at gmail.com> wrote:

> No.
>
> -Blake
>
>
> On Wed, Aug 28, 2013 at 3:22 PM, Ahmed Hilmy <hilmy.aa at gmail.com> wrote:
>
>> Hi Friends,
>>
>> when i force prefix Z to be advertised to ISP A only and to ISP B 
>> only when ISP A is down.
>> does my end customer will face an outage or a flap ?  i want that the 
>> recovery time should be fast enough that the customer will not be 
>> able to sense it.
>> Does  conditional advertisement do that ?
>>
>>
>> On Wed, Aug 28, 2013 at 10:41 PM, Ahmed Hilmy <hilmy.aa at gmail.com> wrote:
>>
>> > i want to understand it
>> >
>> >
>> > On Wed, Aug 28, 2013 at 12:28 PM, Gert Doering <gert at greenie.muc.de
>> >wrote:
>> >
>> >> Hi,
>> >>
>> >> On Wed, Aug 28, 2013 at 11:27:20AM +0300, Ahmed Hilmy wrote:
>> >> > We are planning to configure  BGP conditional advertisement at 
>> >> > our
>> >> Network.
>> >> > I would like to share with you the idea behind that.
>> >> > We have 4 UP Links , we are advertise our prefixes to them 
>> >> > identical
>> on
>> >> all
>> >> > of Links.
>> >> > So what is the best practice to deploy  conditional advertisement.
>> >>
>> >> "Not use features that you don't understand"
>> >>
>> >> gert
>> >> --
>> >> USENET is *not* the non-clickable part of WWW!
>> >>                                                            // 
>> >> www.muc.de/~gert/ Gert Doering - Munich, Germany 
>> >> gert at greenie.muc.de
>> >> fax: +49-89-35655025
>> >> gert at net.informatik.tu-muenchen.de
>> >>
>> >
>> >
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>>
>
>
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