Thx. I did not paly with all that different strings but nice to know. :-)

 

So in short "*" can include space in AS path string i.e. "_" and it covers "any 
multiples" too.

 

thanks

 


 


Date: Mon, 23 Nov 2009 09:57:43 -0700
Subject: Re: [OSL | CCIE_RS] Core Knowledge Quizzer Question 38 : BGP
From: bbar...@ipexpert.com
To: patelpr...@hotmail.com
CC: lucho.ort...@usa.net; ccie_rs@onlinestudylist.com

FWIW, If you only wanted one AS in the middle it could be something like this:

AS#_[0-9]+_AS#


On Mon, Nov 23, 2009 at 8:59 AM, pra pa <patelpr...@hotmail.com> wrote:


Thx,  I did not test it.
 
It is interesting.
 


Date: Mon, 23 Nov 2009 08:45:18 -0700
Subject: Re: [OSL | CCIE_RS] Core Knowledge Quizzer Question 38 : BGP
From: bbar...@ipexpert.com
To: patelpr...@hotmail.com
CC: lucho.ort...@usa.net; ccie_rs@onlinestudylist.com




Pra pa,

That's not what it means. Log into a route viewer and try this:

sho ip bgp 7018_.*_80

   Network          Next Hop            Metric LocPrf Weight Path
*  3.0.0.0          12.123.13.241                          0 7018 2914 9304 80 i
*                   12.123.45.252                          0 7018 2914 9304 80 i
*                   12.123.145.124                         0 7018 2914 9304 80 i
*                   12.123.134.124                         0 7018 2914 9304 80 i


On Mon, Nov 23, 2009 at 8:24 AM, pra pa <patelpr...@hotmail.com> wrote:


_.*_ means only one AS between 850 and 12
 
so answer should be  NO
 
if it is 820-1546-12 then it is YES 
 

 


Date: Sun, 22 Nov 2009 18:14:41 -0500
From: lucho.ort...@usa.net
To: ccie_rs@onlinestudylist.com
Subject: [OSL | CCIE_RS] Core Knowledge Quizzer Question 38 : BGP 




I was going through the questions in the Core Knowledge Quizzer and hit this 
question which answer I believe is wrong. 
Would the BGP regular expression "^820_.*_12" match the AS Path "820 1546 9612 
12"? 
The answer given is No but I think it should be yes. Could anyone show me a way 
of testing thing? 
Thank you, 
  





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URL: http://www.IPexpert.com
                                          
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