RE: Reg Experts!

<ctrl> v for the escape, then ?

-ryan

> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On
> Behalf Of Jack Router
> Sent: Wednesday, June 09, 2010 3:36 PM
> To: 'Tyson Scott'; 'Poplawski, James'; ccielab_at_groupstudy.com
> Subject: RE: Reg Experts!
>
> How do you test expressions with question mark. As soon as I type it IOS
> thinks it is help:
>
> route-views.optus.net.au>sh ip bgp regexp 202?
> LINE <cr>
>
>
> -----Original Message-----
> From: Tyson Scott [mailto:tscott_at_ipexpert.com]
> Sent: 9-Jun-10 15:29
> To: 'Poplawski, James'; 'Jack Router'; ccielab_at_groupstudy.com
> Subject: RE: Reg Experts!
>
> If you guys want to play around with it go to a public route-server and test
> your expressions. Search google for "route-server" I for example frequently
> use route-server.ip.att.net
>
> Here is what 100+ matches. Notice the output. It is matching 10002 and
> 10026
>
> route-server>show ip bgp regexp 100+
> BGP table version is 41364546, local router ID is 12.0.1.28 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
> * 12.120.206.0/24 12.122.125.4 1666 0 7018 17224
> 10002 17225 i
> * 12.123.139.124 0 7018 17224
> 10002 17225 i
> * 12.123.5.240 0 7018 17224
> 10002 17225 i
> * 12.123.21.243 0 7018 17224
> 10002 17225 i
> *> 12.123.1.236 0 7018 17224
> 10002 17225 i
> * 12.122.83.91 1711 0 7018 17224
> 10002 17225 i
> * 12.123.37.250 0 7018 17224
> 10002 17225 i
> * 12.123.134.124 0 7018 17224
> 10002 17225 i
> * 12.123.29.249 0 7018 17224
> 10002 17225 i
> * 12.123.142.124 0 7018 17224
> 10002 17225 i
> * 12.123.137.124 0 7018 17224
> 10002 17225 i
> * 12.123.25.245 0 7018 17224
> 10002 17225 i
> * 12.123.17.244 0 7018 17224
> 10002 17225 i
> * 12.123.41.250 0 7018 17224
> 10002 17225 i
> * 12.123.9.241 0 7018 17224
> 10002 17225 i
> * 12.123.13.241 0 7018 17224
> 10002 17225 i
> * 12.123.45.252 0 7018 17224
> 10002 17225 i
> * 12.123.133.124 0 7018 17224
> 10002 17225 i
> * 12.123.33.249 0 7018 17224
> 10002 17225 i
> * 12.123.145.124 0 7018 17224
> 10002 17225 i
> * 27.1.0.0/18 12.122.125.4 511 0 7018 10026 9848
> 9943 i
> * 12.123.139.124 0 7018 10026 9848
> 9943 i
> * 12.123.5.240 0 7018 10026 9848
> 9943 i
> * 12.123.21.243 0 7018 10026 9848
> 9943 i
> *> 12.123.1.236 0 7018 10026 9848
> 9943 i
> * 12.123.13.241 0 7018 10026 9848
> 9943 i
> * 12.123.134.124 0 7018 10026 9848
> 9943 i
> * 12.122.83.91 161 0 7018 10026 9848
> 9943 i
> * 12.123.9.241 0 7018 10026 9848
> 9943 i
> * 12.123.41.250 0 7018 10026 9848
> 9943 i
> * 12.123.133.124 0 7018 10026 9848
> 9943 i
> Network Next Hop Metric LocPrf Weight Path
> * 12.123.142.124 0 7018 10026 9848
> 9943 i
> * 12.123.17.244 0 7018 10026 9848
> 9943 i
> * 12.123.145.124 0 7018 10026 9848
> 9943 i
> * 12.123.37.250 0 7018 10026 9848
> 9943 i
> * 12.123.137.124 0 7018 10026 9848
> 9943 i
> * 12.123.29.249 0 7018 10026 9848
> 9943 i
> * 12.123.25.245 0 7018 10026 9848
> 9943 i
> * 12.123.45.252 0 7018 10026 9848
> 9943 i
> * 12.123.33.249 0 7018 10026 9848
> 9943 i
> * 27.1.64.0/18 12.122.125.4 511 0 7018 10026 9848
> 9943 i
> * 12.123.139.124 0 7018 10026 9848
> 9943 i
> * 12.123.5.240 0 7018 10026 9848
> 9943 i
> * 12.123.21.243 0 7018 10026 9848
> 9943 i
> *> 12.123.1.236 0 7018 10026 9848
> 9943 i
> * 12.123.13.241 0 7018 10026 9848
> 9943 i
> * 12.123.134.124 0 7018 10026 9848
> 9943 i
> * 12.122.83.91 161 0 7018 10026 9848
> 9943 i
> * 12.123.9.241 0 7018 10026 9848
> 9943 i
> * 12.123.41.250 0 7018 10026 9848
> 9943 i
> * 12.123.133.124 0 7018 10026 9848
> 9943 i
> * 12.123.142.124 0 7018 10026 9848
> 9943 i
> * 12.123.17.244 0 7018 10026 9848
> 9943 i
> * 12.123.145.124 0 7018 10026 9848
> 9943 i
> * 12.123.37.250 0 7018 10026 9848
> 9943 i
> * 12.123.137.124 0 7018 10026 9848
> 9943 i
> * 12.123.29.249 0 7018 10026 9848
> 9943 i
> * 12.123.25.245 0 7018 10026 9848
> 9943 i
> * 12.123.45.252 0 7018 10026 9848
> 9943 i
> * 12.123.33.249 0 7018 10026 9848
> 9943 i
> * 27.1.128.0/18 12.122.125.4 511 0 7018 10026 9848
> 9943 i
> * 12.123.139.124 0 7018 10026 9848
> 9943 i
> * 12.123.5.240 0 7018 10026 9848
> 9943 i
> * 12.123.21.243 0 7018 10026 9848
> 9943 i
> *> 12.123.1.236 0 7018 10026 9848
> 9943 i
> * 12.123.13.241 0 7018 10026 9848
> 9943 i
> * 12.123.134.124 0 7018 10026 9848
> 9943 i
> * 12.122.83.91 161 0 7018 10026 9848
> 9943 i
>
> Regards,
>
> Tyson Scott - CCIE #13513 R&S, Security, and SP Managing Partner / Sr.
> Instructor - IPexpert, Inc.
> Mailto: tscott_at_ipexpert.com
> Telephone: +1.810.326.1444, ext. 208
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>
> -----Original Message-----
> From: Poplawski, James [mailto:jpoplawski_at_starkinvestments.com]
> Sent: Wednesday, June 09, 2010 3:26 PM
> To: 'Jack Router'; 'Tyson Scott'; ccielab_at_groupstudy.com
> Subject: RE: Reg Experts!
>
> I thought it was matching 100 or any combination of 100, IE 100 100 100 100 in
> the case of prepending.
>
> The _100+ worked for my lab to allow the 100's through (9 of them
> prepended) however the solution had the crazy ^([0-9]+)(_\1)*$ sequence
> for solution.
>
> -----Original Message-----
> From: Jack Router [mailto:pan.router_at_gmail.com]
> Sent: Wednesday, June 09, 2010 2:22 PM
> To: 'Tyson Scott'; Poplawski, James; ccielab_at_groupstudy.com
> Subject: RE: Reg Experts!
>
> What about 5th: _100+
> Should it be: begins with 100 and has any number of 0s after it ?
>
> As per DOC CD:
> + Matches one or more sequences of the character preceding the plus sign.
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On
> Behalf Of Tyson Scott
> Sent: 9-Jun-10 15:12
> To: 'Poplawski, James'; ccielab_at_groupstudy.com
> Subject: RE: Reg Experts!
>
> James,
>
> The first will deny only if the last AS in the path was 200 The second will deny
> if in the path 200 and originated in 300 but may have additional AS's as well
> first.
> The first one only allows two AS
>
> The third will allow either 1 AS in the path or Null (Meaning local AS
> prefixes.)
> The fourth will match if 1 AS is in the path or if 1 AS plus the as 1 as the
> originator in the path
>
> The fifth is an AS that begins with 100 and has any numbers after it.
> The sixth is the same as the third
>
>
> Regards,
>
> Tyson Scott - CCIE #13513 R&S, Security, and SP Managing Partner / Sr.
> Instructor - IPexpert, Inc.
> Mailto: tscott_at_ipexpert.com
>
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On
> Behalf Of Poplawski, James
> Sent: Wednesday, June 09, 2010 1:19 PM
> To: 'ccielab_at_groupstudy.com'
> Subject: Reg Experts!
>
> Just going through Narbik's Regular Expression listings and using INE
> "Understanding BGP Regular Expressions" for reference.
>
> I have some questions if anyone can explain in people terms. Here goes.
>
> What's the difference between?
> deny ^200_300$
> deny _200_300$
>
> ^([0-9]+)?$
> ^([0-9]+)(_1\)*$
>
> _100+
> ^([0-9]+)(_\1)*$
>
> In regards to ^([0-9]+)(_\1)*$ why is the number 1 chosen? Why have it at
> all? Why not have a 0 or a 2 in there? I'm still looking through documentation
> on \.
>
> Any help is appreciated, thanks!
> JB
>
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Received on Wed Jun 09 2010 - 19:46:04 ART