Sending option 60 with DHCP server

Arno · January 7, 2021, 12:28pm

Hi,

For iptv a dhcp server on OpenWRT has to send option 60 to the client (set top box).
Tried isc-dhcp-server, udhcpd and kea.
Does someone know if that is possible? Non of the above seems to work, the lease shows the vendor class identifier of the manufacturer instead of my custom one. Or kea has no port open to listen on.

(OpenWRT 19.07.5 on Netgear R7800)

frollic · January 7, 2021, 12:36pm

You can add it in network->interfaces->LAN->DHCP server->advanced settings->DHCP options.

But it'll be used by all clients.

trendy · January 7, 2021, 12:36pm

Nope.

frollic · January 7, 2021, 12:39pm

Even better

Arno · January 7, 2021, 12:52pm

If remember correctly I already tried that option but I'll try again.
Should it be 60,IPTV_RG or 60,"IPTV_RG"?

vgaetera · January 7, 2021, 1:04pm

DHCP option 60 aka vendor class identifier is supposed to be sent from DHCP client to the server.

Arno · January 7, 2021, 6:30pm

For iptv the dhcp server who's serving the ip address to the settopbox has to send the string.

Tried several things without success.
pfSense can do it but I want to connect the settopbox to a router/switch instead of the firewall.
Installing pfSense just for routing a number of subnets is overkill to me.

vgaetera · January 7, 2021, 7:18pm

There's a good explanation:

DHCP Options 43, 55, and 60 and Other Customized Options

OPTION CODE OPTION NAME OPTION DESCRIPTION/BEHAVIOR

60 Vendor Class Identifier (VCI) Sent from client to server. Vendor type and configuration of a DHCP client. The DHCP client sends option code 60 in a DHCPREQUEST to the DHCP server. When the server receives option 60, it sees the VCI, finds the matching VCI in its own table, and then it returns option 43 with the value (that corresponds to the VCI), thereby relaying vendor-specific information to the correct client. Both the client and server have knowledge of the VCI.