DHCP server option 43

knaik99 · ‎06-12-2020

at one site,there is L2 LAN core and that core is connected to WAN router so we want to create DHCP server with option 43 for IP assignment to AP so Can we create DHCP pool on L2 core?

if not,why?

ip dhcp pool AP_Addr
network ip dhcp pool AP_Addr
network x.x.x.128 255.255.255.192
default-router x.x.x.129
option 43 hex x.x.x.x

Rafael E · ‎06-12-2020

i dont think i am following "L2 LAN core"

is that box the GW (gate way) for your APs? if yes then it is ok to configure the DHCP pool there.

Saludos,
Rafael - TAC

kapydan88 · ‎06-12-2020

You also need to specify ip address of dns server in this dhcp pool for access points

ip dhcp pool wifi_ap_new
network 10.3.2.0 255.255.255.0
default-router 10.3.2.1
option 43 hex f104....
dns-server 192.168.1.10

Rich R · ‎06-13-2020

DNS server is *not* required for AP to join WLC. You might have other reasons for wanting DNS of course.

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kapydan88 · ‎06-14-2020

Yes, it is not necessary to specify ip of dns server in the dhcp pool for access points.

If wlc is located on a remote site, problems in registering points may be caused by poor link quality.

Scott Fella · ‎06-13-2020

You typically want to run your dhcp on the L3 device that has the vlan interface. I don’t thing running that on a L2 switch will work or is the way to do it.

-Scott
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