topic Re: Some Wireless Users are not getting IP in Wireless

Some Wireless Users are not getting IP

waseem.ullah6@gmail.com — Mon, 23 Oct 2023 15:15:10 GMT

Hi All,

I have setup which consists of WLC 9800-40 and catalyst 9136 APs. Some users are able to get the IP address from the DHCP server whereas some users are unable to get the IP Addresses. Please need your suggestions

Re: Some Wireless Users are not getting IP

Mark Elsen — Mon, 23 Oct 2023 15:36:44 GMT

- Have a checkup analysis and review of the WLC 9800-40 configuration with the CLI command show tech wireless ; feed the output into : Wireless Config Analyzer

Use these recommended setup(s) for DHCP : https://www.cisco.com/c/en/us/products/collateral/wireless/catalyst-9800-series-wireless-controllers/guide-c07-743627.html#DHCPbridgingandDHCPrelay

- If problem persists use client debugging according to https://logadvisor.cisco.com/logadvisor/wireless/9800/9800ClientConnectivity , you can have client debugs (so called RadioActive Traces) analyzed with : https://cway.cisco.com/wireless-debug-analyzer

Re: Some Wireless Users are not getting IP

Leo Laohoo — Tue, 24 Oct 2023 01:25:54 GMT

Maybe the IP address pool is not large enough.

Try and clear the address pool.

Re: Some Wireless Users are not getting IP

waseem.ullah6@gmail.com — Tue, 24 Oct 2023 18:21:10 GMT

Thanks to all, i checked the Radio Active trace for one User (MAC address) and i found the user was timeout in IP Learn. After troubleshooting the issue i found that the subnet mask configured under SVI was different from the subnet mask inside the DHCP pool. After fixing subnet mask under SVI, the issue was fixed.