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

Thanks for answers but what is the answer to the main question:
"R1 ONLY gets a single default route, the question is WHY?"

On Fri, Oct 22, 2010 at 2:25 PM, Narbik Kocharians <narbikk_at_gmail.com> wrote:
> *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
> Sr. Technical Instructor
> YES! We take Cisco Learning Credits!
> Training And Remote Racks available
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Fri Oct 22 2010 - 14:43:36 ART