RE: bgp question

From: Scott Morris (swm@emanon.com)
Date: Sat Feb 10 2007 - 22:47:45 ART


Per the original question:
 
'U cannot use "ebgp-mulithop"'
 
;) Otherwise, keep things simple.
 
 
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
IPexpert VP - Curriculum Development
IPexpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com
 

  _____

From: Narbik Kocharians [mailto:narbikk@gmail.com]
Sent: Saturday, February 10, 2007 8:44 PM
To: swm@emanon.com
Cc: Dishan Gamage; Cisco certification
Subject: Re: bgp question

I agree, but i normally tell my students to go with the most simple and
common answer to handle the question/s and if that doesn't cut it then go to
the enxt level. But i agree, lab can be more difficult than real life.

On 2/10/07, Scott Morris <swm@emanon.com> wrote:

Most of the time, we do weird things because the lab says so. :)
 
Real life is much simpler!
 
Scott

  _____

From: Narbik Kocharians [mailto:narbikk@gmail.com]
Sent: Saturday, February 10, 2007 8:35 PM
To: swm@emanon.com
Cc: Dishan Gamage; Cisco certification
Subject: Re: bgp question

 
YEP, you are correct, but i still don't understand the question, if it's
just matter of peering, then the "neighbro ebgp-multihop" should cover that,
unless he was asked not to use that, which means that the "ttl-security"
command will accomplish that task. But if it's matter of only allowing
prefixes with X amount of AS numbers in the As-path list then it's
"maxas-limit".
But you are correct.

 
On 2/10/07, Scott Morris <swm@emanon.com> wrote:

That would assist you with limiting individual updates and how many "hops"
away they are. I took his question meaning to establish the bgp connection
to begin with since he mentioned ebgp-multihop...
 
So I guess it depends on whether we're talking about the connection itself,
or within the connection!

 

 
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
IPexpert VP - Curriculum Development
IPexpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com <http://www.ipexpert.com/>
 

  _____

From: Narbik Kocharians [mailto:narbikk@gmail.com]
Sent: Saturday, February 10, 2007 1:46 PM
To: Scott Morris
Cc: Dishan Gamage; Cisco certification
Subject: Re: bgp question

 

I don't know the entire topology and the actual question but MAYbe the "bgp
maxas-limit" can also help.

On 2/9/07, Scott Morris <swm@emanon.com> wrote:

I'd suggest looking at a neighbor command having to do with "security" and
see what kinda description may fit your need.

Or since we know that ebgp-multihop has to do with a measurement of TTL,
searching through the command reference about other things dealing with ttl
may help as well.

;)

Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
IPexpert VP - Curriculum Development
IPexpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com <http://www.ipexpert.com/>

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Dishan Gamage
Sent: Friday, February 09, 2007 2:51 AM
To: Cisco certification
Subject: bgp question

Hi Group

If u are asked to

Configure PE1, such that eBGP peers farther than 3 hops away won't b able to

establish neighbor relationship until they move 2 hops away or closer to
PE1. U cannot use "ebgp-mulithop"

what commands do i need to use here ??

tks in advance
dishan



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