CLI Commands Interface - IP Helpers

[Oscar Castillo]

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.

[Rasika Nayanajith]

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 ***

[sremk]

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