Config Museum: IPv6 Addressing

By certskills October 29, 2011 07:00

This blog post creates one of what may be many posts in a concept called the Config Museum. Years from now, this concept may really be a museum of configuration exercises and answers. But just like a museum holds lots of interesting things that people created or collected, somebody’s got to make the interesting things to begin with. I’ve done a few in the CCENT Skills blog, and this is the first such post over here in the CCNA Skills blog. So we need some more art before we can fill a museum!

So, what kind of art goes into a Config Museum? For now, they are configuration-focused short lab exercises that you can do on paper to practice configuring different features. All these exercises give you a chance to practice configuration. There will be no intent to deceive, to find some oddball obscure facts, and they will seldom look at corner cases. You don’t need real gear or a simulator, but feel free to implement the labs if you like. It’s practice doing the core things well. Plain and simple, it’s practice, man, practice.

Today’s post lists an exercise for IPv6 addressing. The details are below the fold. Enjoy!

Tasks: Develop the IPv6 Address Configuration for an Internetwork

The following figure shows a simple internetwork with three routers. The figure shows a bold number beside each of the three LAN segments; these numbers are the 64-bit (16 hex digit) IPv6 prefix to use to identify each IPv6 subnet. Your job: create the interface IPv6 address configuration for these routers for IPv6, starting with routers whose configurations were just erased.

Your jobs and rules:

  1. Enable IPv6 routing on each router, but only for unicast packets, and do not enable any routing protocols.
  2. All interfaces use the 64-bit prefix represented in bold per the figure.
  3. Note that in the figure, some prefixes are abbreviated, some are not. In your configuration, list all addresses with the optimal abbreviation, which is what you would then later see in the output of a show running-config command.
  4. All LAN interfaces should use addresses with the prefixes shown in the figure, but use EUI-64 to set the interface ID of each address, respectively.
  5. All WAN interfaces should be configured with the host portion of the IPv6 address as mostly 0s. Specifically, for the last 16 hex digits, use 15 hex 0s, with the last hex digit being the router number (1, 2, or 3). (For example, with no abbreviation, R1 would use 0000:0000:0000:0001.)  Remember to use the optimally abbreviated address when choosing the command (just for more practice).
  6. Assume all routers have all default configurations at the beginning of this lab, as if someone had just erased the configuration and reloaded the routers.
  7. Use defaults unless absolutely necessary to change a setting to meet the requirements listed in this lab.
  8. Assume the topology is built with gear in a single lab, with no Telco.
  9. Each router should be able to successfully ping its three own IPv6 addresses when complete.

Figure: Router Triangle, No Config Yet, with IPv6 Prefixes in Bold

Answers: IPv4 Static Routes 3
Answer, Config Museum Lab: IPv6 Addressing
By certskills October 29, 2011 07:00
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