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

From: Narbik Kocharians (narbikk@gmail.com)
Date: Thu Dec 18 2008 - 15:47:12 ARST

If you like we can call each other and chat, if that would help?

On Thu, Dec 18, 2008 at 9:41 AM, Andy Hogard <andyhogard@gmail.com> wrote:

> Hmm, I dont think so.
>
> For instance ..the below mentioned prefix, originates at R5 nah
> *> 5.0.0.0 131.1.23.3 0 300 400 500 i
>
> I am getting confused now ya, only prefix 3.0.0.0 originates in AS 300,
> yeah its true that for R2, they have been received/orginated in AS 300.
>
> Your comments please.
>
> Regards,
> Andy.
>
>
> On Thu, Dec 18, 2008 at 10:15 PM, Narbik Kocharians <narbikk@gmail.com>wrote:
>
>> 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/
>>>>>
>>>>>
>>>>> Blogs and organic groups at http://www.ccie.net
>>>>>
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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 <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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