topic Re: DHCP server wlc 9800 in Wireless

DHCP server wlc 9800

athan1234 — Fri, 28 Jul 2023 07:20:11 GMT

Hello, I'm trying to get the guest user to get an IP address from the controller 9800. They don't receive IP.

I am able to capture a packet from the WL on vlan 1 using pcket.
I was able to collect a packet through a user PC that was attempting a connection with an SSID visitor, and I have attached it to you.

I observed the discovery attempt to accomplish it through vlan 2 user corp on the capture from wlc vlan 1.

I am seeing that vlan 1 is native after enabling cdp to see the connection software.

Is it possible that the issue is that the vlan native is similar to native?
The possibility that vlan 1 is not flowing through the trunk port is another question.

I provide the screen shot brief and bundle.

Re: DHCP server wlc 9800

Mark Elsen — Fri, 28 Jul 2023 10:03:35 GMT

- Have a checkup of the 9800 WLC configuration with the CLI command show tech wireless ; feed the output into
https://cway.cisco.com/wireless-config-analyzer/
Consider this procedure mandatory!

For best DHCP setup follow these guidelines : https://www.cisco.com/c/en/us/products/collateral/wireless/catalyst-9800-series-wireless-controllers/guide-c07-743627.html#DHCPbridgingandDHCPrelay

You can debug clients according to : https://logadvisor.cisco.com/logadvisor/wireless/9800/9800ClientConnectivity
Client debugs can be analyzed and viewed in a high level format with : https://cway.cisco.com/tools/WirelessDebugAnalyzer/

For guest access troubleshooting use : https://logadvisor.cisco.com/logadvisor/wireless/9800/9800CWA

Re: DHCP server wlc 9800

athan1234 — Fri, 28 Jul 2023 11:35:39 GMT

Regards, @Mark Elsen Regarding my inquiry, I'd appreciate some feedback.

Re: DHCP server wlc 9800

Flavio Miranda — Fri, 28 Jul 2023 11:45:44 GMT

Hi @athan1234

How your topology looks like?

Keep in mind that for guest user, they first get an IP address on the local network. If you have a layer3 device between you client and the 9800, you need to use "ip helper-address" on the Layer3 device.

Re: DHCP server wlc 9800

Mark Elsen — Fri, 28 Jul 2023 13:01:16 GMT

- I was under the impression that I gave lots of feedback in my initial
reply !

M.