Cisco Ipversity Lab 2 Writeup: Bamboozled by VoIP

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Fix My Lab Challenge #2 (5-4-20)

Link to Lab: https://ipversity.com/fix-my-lab

I was so focused on the IP Phones I learned about them, and then realized they were bait. This video shows how to configure Cisco IP Phones: https://www.youtube.com/watch?v=RB4LiS2lIXo. You don't need to know, but its interesting anyway.

The Layer 3 Switch in Packet Tracer can't handle VoIP. A Router can. I looked on Youtube and found 0 vidoes on L3 Switches being the main source for VoIP. Its probably possible on GNS3 and physical equipment. Not so for Packet Tracer. The objectives never point out to fixing VoIP. The phones are just there to distract and trick you. Treat them like they are invisible. I never knew a connection could pass with a non-configured Cisco IP-Phone. I tried to enable "ip routing" on the L3 Switch and that did not turn the telephony option on. The initial config on the Switch ACTS as if VoIP will work, with DHCP set up for vlan 10 "DATA" and vlan 11 "VOICE". The creator is just trolling you lol.

Walk-through Spoilers

The first thing to do is ping 10.0.10.1 from PC0. No connection. Lets fix that first. Do a show run command on the Core L3 Switch.

The switchport allowed is a Security thing. That isn't required. We can allow vlan 10 and leave everything else off. We will do this for interfaces g1/0/1 and g1/0/2. Also create VLAN 10, name it DATA, and assign it an IP Address of 10.0.10.1

Now we will go over to Switch0 and see what the interfaces look like. Interface f0/1 also has a vlan10 issue. Lets allow that. Lets also put f0/2 on switchport mode access and switchport access vlan 10.

The next step is to fix Switch1 and PC1 on the other side. This side is also missing VLAN 10. Add vlan 10 to interface f0/2.

Yay now both PC0 and PC1 can ping each other. Lets fix DNS next. Both PC's are using Static IP Configuration. The DNS server is pointing to 10.0.12.11. It needs to point to 10.0.12.10.

Go into Core Switch and enable ip routing. This will allow inter-vlan communication to happen between MGMT 12 and DATA 10.

Since our DNS is pointing in the right direction and we can get to it, the webpage is now displayed.

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