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On which case we can say there is high interface utilisation

krahulbgp
Level 1
Level 1

On which case we can say there is high interface utilisation 

Either 

case 1 when transmit percentage is high 

Case 2 when  Received percentage is high 

Or Both should high

1 Reply 1

Joseph W. Doherty
Hall of Fame
Hall of Fame

Either case or both cases.

However, tx utilization's significance is a bit different from rx utilization, as the former's queuing can distort utilization.

For example, assume 10 ingress interfaces all egress 1 interface.  Further, assume, 10 frames/packets all arrive concurrently, but the egress interface only can buffer 5.  The tx usage will only account for the 5 frames/packets transmitted, but 50% of the traffic was lost.

Also keep in mind utilization is but a total possible capacity measurement over some time interval, actual usage is always zero or 100%.  Such a measurement, alone, tells little about the interface, as all interfaces (themselves) should be able to sustain 100% usage, in and out, concurrently.

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