So if you configure SNMP on the network-wide -> general page, each network element in that network will be able to be polled on their management IP. So you can set your NMS to send SNMP get's that way. The only thing is that you will not get any fancy QoS or other OID's but only the standards supported IFMIB OID's which include octets/sec, pkts/sec, broadcast, multicasts and unknown unicast pkts/sec, interface errors etc.
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