Flexconnect and DHCP

[tahequivoice]

I am curious if this has been tried before.

If ip helper address is used on the gateway interface for the AP management network, and points to the WLC that is serving the IP's, does the WLC send Option 43 to the AP's?  I have been setting up local DHCP pools on the routers for each location, but haven't tried to forward the DHCP requests to the WLC in this type of setup where the WLC is colocated centrally from all the sites.

[Scott Fella]

The WLC when used as a dhcp server doesn't send Option 43.  If you are trying to use ip helper then you need to also use ip forward protocol udp 12222 and ip forward protocol udp 12223.  This is the way you can forward the join broadcast to the WLC without the need of option 43 or DNS.

Thanks,

Scott

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[tahequivoice]

OK I will give that a try. Should be much easier than figuring out the HEX.   Not that I can't do it, I just dont do it enough.

[Scott Fella]

That is how I do it.... I will remove that ip forward protocol after I'm done unless my customers wnat to keep it.

Thanks,

Scott

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[Scott Fella]

Just to add... Steve also reminded me of UDP 5246 & 5247 if your AP's are CAPWAP:)

Thanks,

Scott

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[tahequivoice]

The WLC in question is a 4402 dinosaur, does that matter?   It has code 6.0.199.

[Scott Fella]

No... Just use UDP 12222 and 12223

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