I just configured LLDP, the Link Layer Discovery Protocol, on a Palo Alto Networks firewall. What I really like about those firewalls is the completeness of configuration capabilities while the possibility to use it easily. Everything can be done via the GUI, even the view of neighbors/peers. Per default, only a few TLVs are sent by the Palo, but this can be extended by using LLDP profiles.
Following are a few configuration screenshots from the Palo as well as the config and show commands from a Cisco switch.
Continue reading Palo Alto LLDP Neighbors
Second post of this little series. While I was using my CCNP SWITCH lab for testing many different protocols, I “showed” and saved the output of those protocols as well. Refer to the lab overview of my last post in order to understand those outputs.
I basically saved them as a reference for myself in case I am interested in the information revealed by them. I won’t explain any details of the protocols nor the outputs here. Just many listings. Fly over them and reflect yourself whether you would understand anything. ;) Here we go:
Continue reading CCNP SWITCH Lab show commands
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 46 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. On some switches the SDM template must be changed to be IPv6 capable such as
sdm prefer dual-ipv4-and-ipv6 default .
Continue reading Wireshark Layer 2-3 pcap Analysis w/ Challenges (CCNP SWITCH)