BiTel

user_rule.editor.class=bitel.billing.module.services.ipn.editor.vlan.CiscoSSHSwitchRuleEditor
gate_manager.class=bitel.billing.server.ipn.vlan.CiscoSSHSwitchGateWorker
use.script=1

gate_manager.class=bitel.billing.server.ipn.vlan.CiscoVlanParentGateWorker
use.script=1

user_rule.editor.class=bitel.billing.module.services.ipn.editor.EmptyContractRuleEditor
gate_manager.class=bitel.billing.server.ipn.DHCPGateWorker

processor.class=bitel.billing.server.ext.dhcp.DHCPRelayProcessor
и как
processor.class=bitel.billing.server.ext.dhcp.DHCPVlanRelayProcessor

#Номер субопции в Option 82, в которой  хранится vlan клиента(нумерация с 1)
dhcp.82.key.option.code=1
#Позиция(номер байта) внутри субопции, в которой  хранится vlan клиента(нумерация с 0).
dhcp.82.key.position=2 (5 тоже ставил)

/------- шлюз BGDHCP---------
setDHCP( DHCP, gateSetup )
{
      Socket socket = null;
      socket = new Socket( DHCP.get("dhcp.ip"), DHCP.get("dhcp.port") );
      InputStreamReader isr = new InputStreamReader( socket.getInputStream() );
      BufferedReader in = new BufferedReader( isr );
      ToXMLStream stream = new ToXMLStream();
        stream.setOutputStream(  socket.getOutputStream() );
        stream.setEncoding( "UTF-8");
        stream.startDocument();
        stream.startElement( "sync" );
        stream.addAttribute( "type", "dhcp" );
       
      stream.startElement( "gate" );
        stream.addAttribute( "id", String.valueOf( DHCP.get("gateId")) );
        stream.addAttribute( "host", DHCP.get("Relay") );   
      ParamDHCP(stream, "dhcp.router", gateSetup);
      ParamDHCP(stream, "dhcp.subnetMask", gateSetup);
      ParamDHCP(stream, "dhcp.dns", gateSetup);
      ParamDHCP(stream, "dhcp.ipAddressLeaseTime", gateSetup);
      ParamDHCP(stream, "dhcp.timeOffset", gateSetup);
      ParamDHCP(stream, "dhcp.option.121", gateSetup);
      ParamDHCP(stream, "dhcp.option.249", gateSetup);
        stream.endElement( "gate" );
      id = DHCP.get("id");
      ip = DHCP.get("ip").split(",");
      for (int i = 0; i < id.length; i++)
      {
           stream.startElement( DHCP.get("start") );
           stream.addAttribute( "gateId", DHCP.get("gateId") );
           stream.addAttribute( "id", String.valueOf( id[i] ) );
         ip[i] = ip[i].substring(0 , 9);
         Hex_ip = Integer.toHexString(Integer.parseInt(ip[i]));
         if(Hex_ip.length() < 8){
            Hex_ip = "0" + Hex_ip;
         }
//log.info("ip["+i+"]= " + Hex_ip.toUpperCase());
         Hex_ip   = Hex_ip.substring(0,2) + " " + Hex_ip.substring(2,4) + " " +Hex_ip.substring(4,6) + " " +
                  Hex_ip.substring(6,8);
           stream.addAttribute( "ip", Hex_ip.toUpperCase() );                           
           stream.endElement( DHCP.get("start") );
/*log.info("id["+i+"] = " + id[i]);
log.info("ip["+i+"]= " + ip[i]);
log.info("ip["+i+"]= " + Hex_ip.toUpperCase());
*/      }

//-------BGDHCP---------
        stream.flushPending();
        stream.getWriter().flush();
        stream.endElement( "sync" );
        stream.endDocument();
        stream.getWriter().flush();
        if( socket != null )
        {
            try
            {
                socket.close();
            }
            catch (Exception e)
            {}
        }
//-------BGDHCP---------
}