DHCP failed. APIPA is being used. for some endpoints

[Bysic]

Even after configuring everything, some of my endpoints still cannot receive IP addresses from DHCP.

I am unable to locate the problem, it might be a packet tracer issue.

[Flavio Miranda]

Hi

For you attach the PacketTracer project here you need to zip your project file.

[Flavio Miranda · Accepted solution]

Hi @Bysic 

  The erros I have found was related to not create vlans on Layer3 switches

  Not configuring interface between switches in trunk

 Not adding ip dhcp exclude address in some routers.

The vlans created on the Access switches must be create on the switches above also.

The file I am attaching should be working. Sometimes when we transfer files like this, the PCs return to static IP addres so make sure all of them are in DHCP mode.

[Bysic]

Thank you for your help. I appreciate it.

[Bysic]

every endpoint has a DHCP IP address now except (Network, Infra, and InfraServers) why is that?

[Flavio Miranda]

The servers are getting IP just fine here in my file?  Did you check if they are in DHCP?

[Bysic]

yes the domain controller is fine, I mean these laptops use APIPA only

[Flavio Miranda]

Laptops is also fine here.  Are you using the file I sent? Any area in specific or all laptops?

[Bysic]

Alright it's fine now after redownloading it, But these 2 servers are not using DHCP IPs

[Flavio Miranda]

Yeah, there is a problem on those switches. Let me see.

[Flavio Miranda · Accepted solution]

Hi

 Well, Take a look on this file now. It worked for me. On the first file I sent, I did not care with servers as I though they could be using static IP address as it is normal for servers.  That´s why I missed the problem.

 Now, they are working with DHCP.  The only thing I end up doing was remove the DHCP scope on the router and add again. This is probably some Bug.

But, I also make a change on the spanning-tree as the access switch was playing the root role for vlan 15 and 47 and it is not good. If you have a distribution/core like you did, it is better them be the root.

[Bysic]

could you please share the configurations you did on the spanning-tree, I would like to do it on another project.

[Flavio Miranda]

Pretty simple. Just go to the switch you want to act as root, which means, have all ports enabled, and run the command

spanning-tree vlan XX root primary

On your project I ran in the Server-Distribution-Sw01

spanning-tree vlan 15 root primary

spanning-tree vlan 47 root primary

[Bysic]

Thank you for your assistance