problem with vendor-class-identifier

[Szabolcs Tóth]

Dear users,

I tried to use vendor-class-identifier option in the below lines, but  
I got the following error
              "no option named vendor-class-identifier in space dhcp"
however the option name can be found in the manual and in a lot of  
docsis forum.
The dhcp server version is 3.1.1-6+lenny4 on a Debian Lenny system.
Please help me to solve my problem,

Regards,
Szabolcs Toth


#class "CPE" {
#        match if ((substring(option vendor-class-identifier,0,6) != "docsis")
#                                   vendor-class-identifier
#               and (substring(option vendor-class-identifier,0,4) !=  
"pktc"));
#        spawn with hardware;
#}


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