Greetings All
I am in the process of writing a BGP class, at present I am specifically
working on a section covering dampening.
My question is "what is a flap"
The two possible answers are:
Answer one
A flap is whenever path information changes for a route. By this definition
if a route goes
My vote would be #2. Simply based on the definition of the verb 'flap': "To
wave ... up *and* down." [emphasis added]
http://www.dictionary.com/cgi-bin/dict.pl?term=flap
---JRE---
""Tom Pruneau"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Greetings All
>
> I am in the proc
A flap occurs when a router receives an advertisement for a prefix and
then subsequently receives a "withdraw" update. That is one flap. If
it comes up and goes back down again, that is two flaps total.
At least, that's how I remember it. Someone please correct me if I'm
wrong.
Regards,
John
I think from BGP's point of view a flap is a withdrawal and announcement of
a routing prefix. Howard Berkowitz will know for sure. Did you check his
BGP papers at http://www.certificationzone.com. Also there's a good paper
here:
http://www.ripe.net/ripe/docs/ripe-178.html
Cisco often uses the
illa Oppenheimer"
>Reply-To: "Priscilla Oppenheimer"
>To: [EMAIL PROTECTED]
>Subject: Re: BGP Dampening, What is a flap? [7:1128]
>Date: Wed, 18 Apr 2001 18:09:50 -0400
>
>I think from BGP's point of view a flap is a withdrawal and announcement of
>a routin
t;whole" as one flap?
Am i going mad.
Cheers
steve
"my mum always said it`s only an exam...PAH...what the heck do she
know"
>From: "Priscilla Oppenheimer"
>Reply-To: "Priscilla Oppenheimer"
>To: [EMAIL PROTECTED]
>Subject: Re: BGP
limit, the route is advertised
again (if it is still UP).
Hope this can help :)
Andy
-Original Message-
From: Stephen Skinner [mailto:[EMAIL PROTECTED]]
Sent: Thursday, April 19, 2001 3:53 PM
To: [EMAIL PROTECTED]
Subject: Re: BGP Dampening, What is a flap? [7:1128]
I always thought of a
hooray .
it looks like as thought i was right about the term flap..just wrong about
BGP ..thanks for the info
chhers
steve
>From: Andy Prima
>To: "'Stephen Skinner'" , [EMAIL PROTECTED]
>Subject: RE: BGP Dampening, What is a flap? [7:1128]
>Date:
OTECTED]]
>Sent: Thursday, April 19, 2001 3:53 PM
>To: [EMAIL PROTECTED]
>Subject: Re: BGP Dampening, What is a flap? [7:1128]
>
>
>I always thought of a "Flap" as a generic term meaning when a
>route/interface/serial-line goes full-circle.regardless of pr
(if it is still UP).
> >
> >
> >Hope this can help :)
> >
> >Andy
> >
> >-Original Message-
> >From: Stephen Skinner [mailto:[EMAIL PROTECTED]]
> >Sent: Thursday, April 19, 2001 3:53 PM
> >To: [EMAIL PROTECTED]
> >Subj
ute is UP.
>> >The accumulated penalty is decremented by the half-life time. When the
>> >accumulated penalty is less than the reuse limit, the route is
advertised
>> >again (if it is still UP).
>> >
>> >
>> >Hope this can help :)
>> &
On Thu, 19 Apr 2001, Priscilla Oppenheimer wrote:
> It doesn't answer the question. It says there's a penalty for each flap.
Is
> there a penalty for
>
> 1. each time a route goes down
> or
> 2. each time a route goes down and back up
>
> The answer is probably number 2, as the orignal poster t
;From: "ElephantChild"
>Reply-To: "ElephantChild"
>To: [EMAIL PROTECTED]
>Subject: RE: BGP Dampening, What is a flap? [7:1128]
>Date: Thu, 19 Apr 2001 20:39:20 -0400
>
>On Thu, 19 Apr 2001, Priscilla Oppenheimer wrote:
>
> > It doesn't answer the que
Answer 1 is correct. A flap is one transition, either from down to up or
from up to down.
""Tom Pruneau"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Greetings All
>
> I am in the process of writing a BGP class, at present I am specifically
> working on a section covering dam
Speaking of, I'll be posting pics of my compost bin, router rack, and
firepit on my homepage tonight. These are my hobbies, I'm a homebody geek,
and I like my life as it is, thankyouverymuch *g*
One of these days I'll get a digital camera so it doesn't take me 4 steps to
get photos up my website
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