router[:[prt][:[tmout][:[retr][:[backoff][:vers]]]]]

Of special interest may be the last parameter, vers. If you set this to '2' then your device will be queried with SNMP version 2 requests. This allows to poll the 64 bit traffic counters in the device and will thus work much better with fast interfaces (no more counter overrun). Note that the order in which the routers are specified on the command line do matter as the same order is used when the configuration file is generated. The first specified router has it's configuration lines genrated first, followed by the lines belonging to the next router and so on.