Junos Cup 2014
Junos Cup 2014

Tournament 1: Honduras Challenge & Solution - Internet Transport Across MPLS-free Core

[ Edited ]
‎06-12-2014 07:31 AM

Country Flag associated with this challenge: HONDURAS

Author: Iria Varela

Title: Internet Transport Across MPLS-free Core

Type: Service Provider


Difficulty: Medium (1 point).;


Technical Description: Achieve connectivity between CE1 and CE2 with just one configuration command at each PE.




Challenge Instructions:

For this challenge, you need to start the topology called: “HONDURAS – Internet Transport across MPLS-free Core”

This challenge represents a typical Service Provider topology.

You have to make it work so you can ping CE2 from CE1:

CE1> ping source count 1

PING ( 56 data bytes

64 bytes from icmp_seq=0 ttl=62 time=13.870 ms

--- ping statistics ---
1 packets transmitted, 1 packets received, 0% packet loss
round-trip min/avg/max/stddev = 13.870/13.870/13.870/0.000 ms

The echo requests from CE1 must reach CE2. And the echo replies from CE2 must reach CE1.

You can only modify the configuration of PE1 and PE2.

You should achieve this with one only set command at each PE (the command can be different at each PE), and the configure / edit / commit commands do not count against your solution
commit and-quit

To solve this challenge submit the single set command issued at each PE.

NOTE: If you have issues connecting to the Junosphere topology please check Junosphere&nbsp;Technical documentation, or request assistance in the Junosphere forum&nbsp;

Send an email with your proposed solution to junos-cup@juniper.net:

The subject should be “<COUNTRY-NAME-OF-THE-CHALLENGE> -&nbsp; <YOUR-FULL-NAME>”. For example: “Brazil – Wolfgang Amadeus Mozart”.
In the email body, please include your proposed solution, along with your first and last name and complete mailing address including zip/postal code and your shirt size (S, M, L, XL, XXL, XXXL)
Some additional notes:

Feel free to participate in as many challenges as you like, they are open to everyone and the more you participate the better chance of winning!

Green Planet Rules: please start one topology at a time, do not run several topologies in parallel and don't forget to stop your active topology when not in use


The answers will be read by the organization right after the deadline


The challenge instructions are final, and no additional information or tips will be provided before the publication of the solution and the winner list. Please don’t expect a reply from junos-cup@juniper.net.


If you feel that your initial solution is wrong or incomplete, you can send up to three messages for the same challenge, but please note that only your last message (received before the deadline) will be read.


If you think there is an error in the definition of the challenges, please send us an email with subject (“<COUNTRY-NAME> ERROR”); if there is no reply, then it’s likely an intentional condition of the challenge, rather than an error.




juniper@PE1# set routing-options dynamic-tunnels myTunnel gre source-address destination-networks 172.16/16


juniper@PE2# set routing-options dynamic-tunnels myTunnel gre source-address destination-networks 172.16/16  


Julie Wider
Advocacy Manager
Twitter: @JNetCommunity & @jawider