what is the name of Option 121?

[朱文佳]

Hello everyone,

I want to set option121 in dhcpd,but I don't konw the name of it
in dhcpd.(I've search a lot of web sites and find nothing.)

I think I should write like this in the config file:

option ???? code 121 = 00:99:11:........

I don't know what the ???? should be.

And where can I get the list of the pair of option name and option code?

Hope your help.Thanks.