From: Scott Morris (smorris@ipexpert.com)
Date: Sat Dec 22 2007 - 15:09:03 ART
If there was no RR, and if R1 was peered with R3 and R4 you MAY have seen
two routes depending on what other configuration you had.
Play with it. Best thing is to lab it and watch it. See what different
changes you make and what effect they'll have on anyone's routing table!
Since people get upset when you play around with routers in real life, it's
definitely recommended to play in a lab!!!
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!
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
Nambi Appachigounder
Sent: Saturday, December 22, 2007 11:15 AM
To: Scott Morris; 'groupstudy'
Subject: RE: BGP RR Question
Thanks Scott and others.Had there not been an RR, R1 would have received
both the routes.Can I say that RR took away some flexibility on R1.(I could
have selected the other route on R1 with weight if there had been no RR).Is
my understanding correct?
Regards,
-Nambi
--- Scott Morris <smorris@ipexpert.com> wrote:
> Disregard last e-mail. Lack of caffeine told me R1 was the RR. It's
> not.
>
> >R2< will have the notes below.
>
> R1, an RR client will only have ONE path.
>
>
> 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 Scott Morris
> Sent: Saturday, December 22, 2007 9:45 AM
> To: 'Nambi Appachigounder'; 'groupstudy'
> Subject: RE: BGP RR Question
>
> That will depend on what you have configured (multipath or not?), but
> in a generic configuration you'll get one "best" path showing up on
> R1.
>
> "sh ip bgp" should indicate to you that there is more than one valid
> path, but only one best path.
>
> "sh ip ro b" will verify your routing table.
>
> 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 Nambi Appachigounder
> Sent: Saturday, December 22, 2007 8:36 AM
> To: 'groupstudy'
> Subject: BGP RR Question
>
> Hi All,
>
> I have a BGP question.Can someone please help me.
>
> 1) R1,R2,R3 and R4 are in AS 100.
> 2) R2 is RR and R1,R3,R4 are RR clients.
> 3) R5 is in AS 200.
>
>
> R1
> |
> |
> R2
> / \
> / \
> / \
> R3 R4
> \ /
> \ /
> \ /
> R5
>
> When R5 advertise advertises a network "X" to R3 and R4, how many bgp
> entries will we see on R1.(only the best or both?)
>
> Thanks,
> Nambi
>
>
> Get the freedom to save as many mails as you wish. To know how,
> go to
>
http://help.yahoo.com/l/in/yahoo/mail/yahoomail/tools/tools-08.html
>
>
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