RE: Regular Expression

From: Scott Morris (smorris@ipexpert.com)
Date: Wed Nov 28 2007 - 11:13:29 ART

B could come to you from anyone as long as the routes originate in AS 200.
 
HTH,
 

Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE-M
#153, JNCIS-ER, CISSP, et al.
CCSI/JNCI-M/JNCI-ER
VP - Technical Training - IPexpert, Inc.
IPexpert Sr. Technical Instructor

A Cisco Learning Partner - We Accept Learning Credits!

smorris@ipexpert.com

 

Telephone: +1.810.326.1444
Fax: +1.810.454.0130
http://www.ipexpert.com

 

  _____

From: Tandou Mohamed [mailto:dtandou@yahoo.com]
Sent: Wednesday, November 28, 2007 9:11 AM
To: smorris@ipexpert.com; ccielab@groupstudy.com
Subject: RE: Regular Expression

Now i understand D. what about B? the origin of the routes will be AS 200
only or can be any adjacent neighbor to AS 200 ?
 
Thanks,
 
Mohamed

Scott Morris <smorris@ipexpert.com> wrote:

D would be routes LEARNED FROM AS 690 (your peer)

HTH,

Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE-M
#153, JNCIS-ER, CISSP, et al.
CCSI/JNCI-M/JNCI-ER
VP - Technical Training - IPexpert, Inc.
IPexpert Sr. Technical Instructor

A Cisco Learning Partner - We Accept Learning Credits!

smorris@ipexpert.com

Telephone: +1.810.326.1444
Fax: +1.810.454.0130
http://www.ipexpert.com

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Tandou Mohamed
Sent: Wednesday, November 28, 2007 8:34 AM
To: ccielab@groupstudy.com
Subject: Regular Expression

Hello GS,
can someone check this out if i am correct about these definition also any
comment on B,C,D and E those really confuse me sometimes.

Thanks,

Mohamed

A) ip as-path access-list 1 permit _109_ => routes containing or
transiting AS 109
B) ip as-path access-list 2 permit _200$ => routes originated in AS
200
C) ip as-path access-list 2 permit ^100$ => routes originated by a
neighbor in AS 100
D) ip as-path access-list 3 permit ^690_ => routes originating from
AS 690
E) ip as-path access-list 3 permit ^$ => routes originating
from this AS (my AS)

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