DHCP Option 82

Could someone please explain to me how Option 82 works? I see you can enable it on the Access Point, but I don't see anywhere on the SM for Option 82.

Hi,

When Option 82 is enabled on the  AP, ePMP inserts “remote-id” (option ID 0×2) to be the SM’s MAC address and the “circuit-id” (ID 0×01) to be the AP’s MAC address. Those two fields are used to identify the remote device and connection from which the DHCP request was received.

For example, I have attached a Wireshark capture and if you analyze the bootp packets, you will find the below.

Trace.PNG

Please let me know if this helps.

Regards,

Vivek Gupta 

3 Likes

Will this still work if you run your customer traffic inside of a VLAN?

Mat

Hi,

Yes, it will work with the VLANs.

Thanks,

Dmitry

is it possible to exempt some vlans or entire subscriber radios from option82?