topic On WLCs, you are not in Wireless

CLI Commands Interface - IP Helpers

Oscar Castillo — Mon, 05 Jul 2021 14:32:11 GMT

Hi all,

I have a quick question. Is there a way that I can see which vlans/interfaces in the WLC are configured with IP helpers?

I hate the GUI, it's hard for me to work in GUI, I rather work in CLI.

(Controller) >show interface summary

Number of Interfaces.......................... 7

Interface Name Port Vlan Id IP Address Type Ap Mgr Guest
-------------------------------- ---- -------- ------------- ------- ------ -----
management LAG 20 10.11.20.9 Static Yes No
redundancy-management LAG 20 0.0.0.0 Static No No
redundancy-port - untagged 0.0.0.0 Static No No
service-port N/A N/A 192.168.20.1 Static No No
virtual N/A N/A 1.1.1.1 Static No No
vlan012 LAG 8 10.11.8.4 Dynamic No No
vlan90 LAG 60 10.11.90.4 Dynamic No No

(Controller) >

Like below:

Router#sh run | inc (Vlan|helper)
interface Vlan4
ip helper-address 10.12.13.14
ip helper-address 10.15.16.1
interface Vlan8
ip helper-address 10.12.13.14
ip helper-address 10.15.16.1
interface Vlan60
ip helper-address 10.12.13.14
ip helper-address 10.15.16.1
interface Vlan100
ip helper-address 10.12.13.14
ip helper-address 10.15.16.1
interface Vlan101
ip helper-address 10.12.13.14
ip helper-address 10.15.16.1
Router#

Thank you in advance.

On WLCs, you are not

Rasika Nayanajith — Tue, 15 Aug 2017 04:29:03 GMT

On WLCs, you are not configuring any helper address.

Interface Name Port Vlan Id IP Address Type Ap Mgr Guest
vlan012 LAG 8 10.11.8.4 Dynamic No No 
vlan90 LAG 60 10.11.90.4 Dynamic No No

As per above output, vlan 8 and 60 use for dynamic interfaces. If you look at L3 switch where those vlan's SVI defined, you will find any helper addreses configured under that

HTH

Rasika

*** Pls rate all useful responses ***

Hi Mate,

sremk — Tue, 15 Aug 2017 14:35:23 GMT

Hi Mate,

As Rasika mentioned, we don't have the concept of ip helper address, instead we use dhcp proxy. More details on dhcp proxy is mentioned in the below link.

https://www.cisco.com/c/en/us/td/docs/wireless/controller/7-4/configuration/guides/consolidated/b_cg74_CONSOLIDATED/b_cg74_CONSOLIDATED_chapter_0110.html

Also you can verify the dhcp proxy settings on command line of controller using the below.

>show interface detail <interface name>

Thanks

Sreejith