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Wireshark Layer 2-3 pcap Analysis w/ Challenges (CCNP SWITCH)

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Wireshark Layer 2-3 pcap Analysis w/ Challenges (CCNP SWITCH)
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Johannes Weber , a networking and security professional, has done something really cool while preparing for his CCNA SWITCH exam. He has built a lab with some networking equipment, configured it all, and captured network traffic, featuring a variety of level 2 and 3 protocols. He has published his setup, the captured traffic, and a variety of challenges, that helped him to prepare, and which can help others.

While preparing for my CCNP SWITCH exam I built a laboratory with 4 switches, 3 routers and 2 workstations in order to test almost all layer 2/3 protocols that are related to network management traffic . And because “ PCAP or it didn’t happen ” I captured 22 of these protocols to further investigate them with Wireshark. Oh oh, I remember the good old times where I merely used unmanaged layer 2 switches. 

In this blogpost I am publishing the captured pcap file with all of these 22 protocols. I am further listing 45 CHALLENGES as an exercise for the reader . Feel free to download the pcap and to test your protocol skills with Wireshark! Use the comment section below for posting your answers.

Of course I am running my lab fully dual-stacked, i.e., with IPv6 and legacy IP .

I think these are great for several reasons:

  • A feature-rich and complete networking setup, which is not easily available to everyone.
  • A fixed set of data (captured network traffic).
  • Plenty of very specific, testable, and verifiable questions.
  • Overall, very helpful resource from an experience professional, for anybody who wants to know about networks.
  • Overall, a great set of questions and challenges for those interviewing networking candidates.

The lab setup includes the following:

  • 1x Cisco Catalyst 2960 , (C2960-LANBASEK9-M), Version 15.0(2)SE9
  • 2x Cisco Catalyst 2950 , (C2950-I6K2L2Q4-M), Version 12.1(22)EA14
  • 1x Cisco Catalast 3560 , (C3560-IPSERVICESK9-M), Version 12.2(55)SE10
  • 3x Cisco Router 2811 , (C2800NM-ADVENTERPRISEK9-M), Version 15.1(4)M9
  • 2x old Notebooks , Dell or somewhat, running either Ubuntu or Knoppix Linux

Personally, I am not very involved with networks these days. But even for more me the above setup serves as a reminder of how complex underlying technology infrastructure has got in recent years – hardware, software, protocols, and all.

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Wireshark Layer 2-3 pcap Analysis w/ Challenges (CCNP SWITCH)
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Leonid Mamchenkov

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