--- /sbin/ifup	2003-09-10 23:06:17.000000000 -0500
+++ /sbin/ifup.new	2003-10-05 21:01:46.000000000 -0500
@@ -244,6 +244,11 @@
           fi
        fi
     fi
+    if [ -n "${DHCP_CLASSID}" ]; then
+       # Send a specific vendor class identifier, instead of
+       # system name, release and machine type
+       DHCPCDARGS="${DHCPCDARGS} -i ${DHCP_CLASSID}"
+    fi
     if need_hostname; then
        # Set hostname of host to host-name option supplied by DHCP.
        PUMPARGS="${PUMPARGS} --lookup-hostname"