Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

Regarding DHCP for Lightweight Access Point

Hi,

I have a 2500 WLC and I'm going to setup DHCP server in 3750x switch, one of the DHCP pool will be issuing ip address for AP. So, in the DHCP pool I should include option 43, am I correct?

If yes, may I know what is the exact steps to configure this? because I'm abit confused over the configuration guide.

If i don't include option 43 then AP will not get IP from the DHCP pool rite?

Thanks.

5 REPLIES

Regarding DHCP for Lightweight Access Point

Honestly, it depends.  I like using option 43 even if the WLC and AP are in the same subent.

Option 43 just informs the AP of where the WLC is, but the AP will get an address with out it.

you just need to define it under the scope, so for example:

ip dhcp pool Test

network 192.168.1.0/24

default-gateway 192.168.1.1

option 43 hex f104.oaoa.oaoa

In the above, my WLC management address is 10.10.10.10.  So long as you have ip reachability it would work

HTH,
Steve

------------------------------------------------------------------------------------------------
Please remember to rate useful posts, and mark questions as answered

HTH, Steve ------------------------------------------------------------------------------------------------ Please remember to rate useful posts, and mark questions as answered

Regarding DHCP for Lightweight Access Point

Hello Stephen.

I never hear you can use DHCP option 43 if the AP's and WLC are in same subnet, I'm relative new in this... Can you say me why is better use it?

Thanks

Regarding DHCP for Lightweight Access Point

Hello,

As per your query i can suggest you the following solution-

Ethernet ports on Cisco 2500 Series Wireless Controllers do not work as Switch ports (that is, 2 machines directly connected to these ports will not be able to communicate with each other). You should not connect servers like DHCP, TFTP etc. on these ports and expect Wireless Clients and APs to receive an IP address from this DHCP server.

Ethernet ports on the Cisco 2500 Series Wireless Controller should only be used to connect/uplink to an infrastructure network configured as a data interface (management interface and dynamic interfaces) or an AP-managers interface.

If multiple Ethernet ports on a Cisco 2500 Series Wireless Controller are uplinked to an infrastructure switch, you should make sure data interfaces (management or dynamic interfaces) or AP-managers interfaces are configured for these uplinked physical ports. Physical Ethernet ports which are used as an uplink to an infra switch should not be left un-configured. This may result in unexpected behaviors.

Multicast unicast is not a supported configuration on Cisco 2500 Series Wireless Controller. As a result, HREAP APs are not able to receive multicast traffic because HREAP APs only work with multicast unicast.

Hope this will help you.

Regarding DHCP for Lightweight Access Point

Abishek,

     that makes absolutely no sense to the question asked.

Daniel,

     Option 43 is always an option to help the AP discover the WLC.  Why is it better? it may not be, but I like to keep my self consistent wtih my deployments.  So I always want to put that option there.

HTH,
Steve

------------------------------------------------------------------------------------------------
Please remember to rate useful posts, and mark questions as answered

HTH, Steve ------------------------------------------------------------------------------------------------ Please remember to rate useful posts, and mark questions as answered

Regarding DHCP for Lightweight Access Point

Thanks for your replay Stephen

179
Views
0
Helpful
5
Replies