Re: Narbik's Gap WB, BGP route dampening, reg exp doubt!?

From: Narbik Kocharians (narbikk@gmail.com)
Date: Thu Dec 18 2008 - 14:45:48 ARST

These are the routes that originated in that AS ONLY.

On Thu, Dec 18, 2008 at 8:37 AM, Andy Hogard <andyhogard@gmail.com> wrote:

> Sir its in the GAP wb, BGP dampening lab. :)
>
> On Thu, Dec 18, 2008 at 9:36 PM, Narbik Kocharians <narbikk@gmail.com>wrote:
>
>> Could you please tell me which lab you are referencing, is it in the GAP
>> or Soup-to-Nuts?
>>
>>
>>
>> On Thu, Dec 18, 2008 at 1:06 AM, Andy Hogard <andyhogard@gmail.com>wrote:
>>
>>> Hi again,
>>>
>>> Well now this is the question ya " All the existing and future prefixes,
>>> from as 300 should have the following parameters applied: and then the
>>> question goes on to specify certain dampening parameter values."
>>>
>>> In the solution a regexp of ^300$ is used to match the routes, this reg
>>> exp
>>> is used for routes that originate from 300 or have only 300 in the
>>> as-path.
>>> But if you read the question again its says that *"routes from as
>>> 300"*which includes all the routes that pass from the as 300 as well,
>>> yeah they
>>> dont originate ya.. But then the question is not exclusively saying
>>> anything
>>> about it. As a result I would rather go with more generic reg exp of
>>> ^300_
>>> ..init !?
>>>
>>> This to me looks like a proctor question, can Narbik Sir please answer
>>> this
>>> ..as he would be the best proctor for this lab he has set. :D
>>>
>>>
>>> Btw, this is the routing table on R2 on which dampening has to be done,
>>>
>>> R2#sh ip bgp
>>> BGP table version is 8, local router ID is 2.2.2.2
>>> Status codes: s suppressed, d damped, h history, * valid, > best, i -
>>> internal,
>>> r RIB-failure, S Stale
>>> Origin codes: i - IGP, e - EGP, ? - incomplete
>>>
>>> Network Next Hop Metric LocPrf Weight Path
>>> *> 1.0.0.0 131.1.12.1 0 0 100 i
>>> *> 2.0.0.0 0.0.0.0 0 32768 i
>>> *> 3.0.0.0 131.1.23.3 0 0
>>> 300 i
>>> *> 4.0.0.0 131.1.23.3 0
>>> 300
>>> 400 i
>>> *> 5.0.0.0 131.1.23.3 0
>>> 300
>>> 400 500 i
>>> *> 40.4.4.0/24 131.1.23.3 0
>>> 300
>>> 400 i
>>> *> 44.4.4.0/24 131.1.23.3 0
>>> 300
>>> 400 i
>>> R2#
>>>
>>>
>>> Btw, I am kicking some butt hard as far as bgp dampening is concerned.
>>>
>>>
>>> Regards,
>>> Andy.
>>>
>>>
>>>
>>>
>>> --
>>> My Blog URL: http://ccieno.blogspot.com/
>>>
>>>
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>>>
>>>
>>>
>>
>>
>> --
>> Narbik Kocharians
>> CCSI#30832, CCIE# 12410 (R&S, SP, Security)
>> www.MicronicsTraining.com <http://www.micronicstraining.com/>
>> www.Net-Workbooks.com <http://www.net-workbooks.com/>
>> Sr. Technical Instructor
>>
>
>
>
> --
> My Blog URL: http://ccieno.blogspot.com/
> 

-- 
Narbik Kocharians
CCSI#30832, CCIE# 12410 (R&S, SP, Security)
www.MicronicsTraining.com
www.Net-Workbooks.com
Sr. Technical Instructor

Blogs and organic groups at http://www.ccie.net

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