Net Optics 96547iTP, 96542iTP manual iTap GigaBit Dual Port Aggregator

iTap GigaBit Dual Port Aggregator

The NIC receives 800 Mbps (80% utilization), so no memory is required for the monitoring device's NIC to process all full-duplex traffic.

If there is burst of traffic on Side A of 900 Mbps and Side B remains at 500 Mbps, the aggregated traffic equals 1400 Mbps, 400 Mbps over the capacity of the NIC. The excess traffic is put in memory on a first-in-first-out basis until either the buf- fer is full or the burst passes.

Side A	iTap GigaBit Dual
	Port Aggregator Tap

A	Network	B	1	2	Dual Port Aggregator
					GigaBit Copper

www.netoptics.com

Router

Side B

Side A +

Side B

Monitoring

Device 1

Monitoring

Device 2

Firewall

Memory

2

The extra 400 Mbps of traffic is stored in buffer memory. Memory continues to fill until capacity is reached, or the burst ends.

Figure 2: Side A plus Side B becomes greater than 100% of the NIC’s receive capacity

After the burst has passed and the buffers have passed all the stored traffic, each monitoring device resumes receiving traffic directly from the link.

Note:____________________________________________________________________

Utilization statistics and alarms are monitored before buffering and aggregation.

__________________________________________________________________________

5