RIPv2: Cert Guide PT Labs for ICND1 Chapter 19

By certskills June 4, 2019 09:05

RIPv2 is an oldie but a goodie, and a great way to learn about IP routing protocols. Here’s some help towards repeating the Examples in the ICND1 100-105 Cert Guide’s RIP chapter. Let me know how it goes!

Advice before You Begin

The big idea is pretty simple: Repeat the Examples in the Official Cert Guide as part of your lab practice for CCNA.

To get your head around what kind of content is here in the blog for these labs, read both of these posts or at least the second post:

After reading those posts, you have the context, so onward to the details!


What’s in This Post

Intro to the Book Chapter: A brief description of the topics in that chapter of the book.

Chapter Examples and .PKT File Reference: A section that lists the examples in the chapter, the .pkt files supplied, and reminders/notes about cases in which we don’t supply all three files for any one example.

Tips and Exceptions: When we build the files, we come across items that we think might confuse you when trying the examples with PT. We write those notes in this section!


Intro to the Book Chapter

Chapter 19 of the ICND1 100-105 OCG is all about the RIP routing protocol. In sequence, RIP is the first IPv4 routing protocol discussed in either the ICND1 or ICND2 book, so it serves as an important learning tool for learning how IP routing protocols work. Make sure to take time to do some labs with RIP, regardless of whether you use these or not.


Chapter Examples and .PKT File Reference

Download this ZIP file to get all the .pkt files for this chapter:

This table tells you what files to expect in the ZIP, and which examples happen to use interface IDs that can be exactly replicated in PT:

Example Topology File Initial Config Ending Config Exact Match of Interface ID?
19-1  Yes  Yes  Yes Yes
19-2  Yes  Yes  Yes Yes
19-3  None  None  Use 19-1 Yes
19-4  None  None  Use 19-1 Yes
19-5  None  None  Use 19-1 Yes
19-6  None  None  Use 19-2 Yes
19-7  Yes  Yes  Yes Yes
19-8  Yes  Yes  Yes Yes
19-9  None  None  None N/A
19-10  None  None  Use 19-1 Yes
19-11  Yes  Yes  Yes No
19-12  None  None  Use 19-11 No
19-13  None  None  Use 19-11 No
19-14  Yes  Yes  Yes Yes
19-15  Yes  Yes  Yes Yes
19-16  None  None  Use 19-15 Yes
19-17  None  None  Use 19-15 Yes
19-18  None None Yes (A and B) Yes


Reminders: Purpose of Each Type of .PKT File

Topology File: The file contains all devices and cables in the associated figure along with any implied extra devices. The purpose: you never had to add a device or cable. It also contains a few configuration commands that do not affect the example, but help you navigate, for instance, it sets hostnames, passwords (always “cisco”), and interface descriptions.

Initial Config: The file contains everything in the Topology file, plus all configuration listed or implied by the words and figures leading up to the example. That is, it attempts to match the state of the network just before the first line of the example.

Ending Config: The file adds the configuration listed in the example to the Initial Config file – nothing more, nothing less.


Table Lists “None” or Other Strange Terms?

Some examples have all three types of PKT files, however, some Examples have no PT files, and some have a mix of fewer than three files. Here’s a reminder of why. You can check this earlier post for more background if you care to know more.

Initial Config as “None”: If the table says “yes” for the Topology and Ending config, but not the Initial config, then the Topology file has all configuration needed at the beginning of the example.

Ending Config as “None”: The Ending config will be shown as “None” when the example as printed in the book does not have any configuration commands.

All Three Files as “None”:  We do not supply .pkt files for that example.

Use x-y:  Use Example x-y’s ending config file because the example continues earlier example x-y.


Tips and Exceptions

This section lists our comments about using PT to do the examples. When we built the files, when we saw any behavior that we thought might make it more difficult to perform the example, we noted that fact so we could list it here, in case it might help you with the examples.


Tips for the Entire Chapter

The chapter has many examples that use different IP addressing plans with the same topology – so just wanted to give you a reminder to pay attention to which IP addressing plan is used by each example.


Example 19-6

The show ip rip database command output in PT differs quite a bit compared to the output from a real (2901) router shown in the example in the book.


Example 19-9

The max-paths RIP subcommand does not appear to be supported by PT in our testing, so we didn’t include PT files for this example – FYI.


Example 19-11

The PT files use slightly different interfaces as compared with the example in the book:

  • Book G0/1 – PT G0/1
  • Book G0/2 – PT G0/2
  • Book G0/3 – PT G0/0


Examples 19-12, 19-13

The PT files use different interfaces compared to the book (same different interfaces as for Example 19-11).

Additionally, note that in PT the show ip route static and show ip route rip commands do not include the gateway of last resort output, whereas on real gear (and therefore in Example 19-12) the output does include the gateway of last resort. When doing the labs in PT, use the show ip route command (without the static or rip keywords) to see the gateway of last resort.


Example 19-18

The text in the book leading up to this example posits two variations in the configuration that should be done before using the show commands shown in the example, so we created two sets of PT files (A and B):

  • Example A configures the no auto-summary command on R1
  • Example B defaults to use the auto-summary command on R1


Static IP Routing: Cert Guide PT Labs ICND1 Chapter 18
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By certskills June 4, 2019 09:05
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