Re: OT - Second Puzzle for CCIE R&S Students

You are obviously talking about the second puzzle.

Let's say you have R1, and then bunch of routers between R1 and R6, so there
are multiple routers between R1 and R6. Let's say there are 4 or more
routers between R1 and R6.

On Fri, Oct 22, 2010 at 11:58 AM, Jack Router <pan.router_at_gmail.com> wrote:

> Do you mean this:
>
> R2-|
> |--R1--R4--R5--R6
> R3-|
>
> R1 to R4 to R5 to R6 direct Ethernet connections ?
>
>
>
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Narbik Kocharians
> Sent: 22-Oct-10 14:26
> To: CCIE Groupstudy
> Subject: OT - Second Puzzle for CCIE R&S Students
>
> *One of the students told me that he did not see the second puzzle, so i am
> posting my original post for the second one.*
>
> The reason I asked to Unicast was so one student will not see the answer
> from another student, this forces some people to lab the scenario and
> think.
>
>
> *Now that I have your attention*, here are some solutions to the problem, I
> am sure there are more ways, and please feel free to add to the list.
>
> 1. Filter all RIPs updates coming from R2 on R3 fa0/0 interface with
> access-list/prefix-list/route-map and vice versa.
> 2. Filter the default route from R2 on R3 and vice versa.
> 3. Instead of filtering, you could also use the distance command and set it
> to 255.
> 4. Filter default from R2 on R3, and R3 to R2 using an "Offset-list in".
> 5. Configure passive-interface on the F0/0 interfaces of R2 and R3, and
> then
> on Both routers configure a "Neighbor R1".
> 6. Configure the ports that R2 and R3 are connected as "swi Protect".
> 7. Configure Private Vlan; configuring the F0/0 interface of R2 and R3 in
> Isolated, and the F0/0 interface of R1 in primary.
> 8. Mac ACLs or an IP access-list and a Vlan Access-map that denies the two
> routers from communicating.
> 9. Configuring an MQC that matches on the destination-address MAC and drops
> that traffic in the policy-map that's assigned to the F0/0 interface of R2
> and Vice versa.
> 10. Dropping the traffic by filtering the MAC on the switchports.
> 11. Put R2 and R3 in different subnets and do a "no validate-update source"
> on R1.
>
>
> *Now could you imagine the following scenario*: you are in a CCIE lab, and
> you just finished the troubleshooting section, so you feel like Mike Tyson
> because you did well, but the first question in the configuration section
> is
> the following:
>
> R1 is running RIPv2.
> R6 is also running RIPv2.
> There are bunch of routers between R1 and R6 running OSPF or whatever
> routing protocol that turns you on.
>
> I want R6 to get all R1 s RIP routes.
>
> Do not use redistribution, AToM, IPnIP or GRE tunnels to accomplish this.
> Come up with 2 solutions. Common unicast me the solution..
>
>
> There is a reason I am doing this, trust me .
>
> --
> Narbik Kocharians
> CCSI#30832, CCIE# 12410 (R&S, SP, Security)
> www.MicronicsTraining.com <http://www.micronicstraining.com/>
> Sr. Technical Instructor
> YES! We take Cisco Learning Credits!
> Training And Remote Racks available
>
>
> Blogs and organic groups at http://www.ccie.net
>
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-- 
Narbik Kocharians
CCSI#30832, CCIE# 12410 (R&S, SP, Security)
www.MicronicsTraining.com
Sr. Technical Instructor
YES! We take Cisco Learning Credits!
Training And Remote Racks available
Blogs and organic groups at http://www.ccie.net