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Community Member

What does it mean?

#sh int s0/0.1

.........................

MTU 1500 bytes, BW 512 Kbit, DLY 20000 usec,

reliability 255/255, txload 71/255, rxload 255/255

What means 255 after / ?

1 ACCEPTED SOLUTION

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Silver

Re: What does it mean?

The Cisco IOS calculates the loading by dividing either the input or output rate by the bandwidth and multiplying by 255. In your case, the bandwidth set on the interface is 512, hence the txload (output rate) is 71 / 255 * 512 = 142kb/s, and the rxload (input rate) is 255 / 255 * 512 = 512kb/s. These values can be crosschecked by the line on the show inerface that gives the 5 minute rate average.

Note that if the wrong bandwidth is configured on the interface, the rxload and txload will not be accurate. And the ratings of these are always against 255.

3 REPLIES
Community Member

Re: What does it mean?

"Load on the interface as a fraction of 255 (255/255 is completely saturated), calculated as an exponential average over 5 minutes."

You have many input traffic on this interface?

Community Member

Re: What does it mean?

Yes, this port is trunk to other switch. Is't unnormaly to have value 255/255.

And why maximum is 255 and not 100 or other?

Silver

Re: What does it mean?

The Cisco IOS calculates the loading by dividing either the input or output rate by the bandwidth and multiplying by 255. In your case, the bandwidth set on the interface is 512, hence the txload (output rate) is 71 / 255 * 512 = 142kb/s, and the rxload (input rate) is 255 / 255 * 512 = 512kb/s. These values can be crosschecked by the line on the show inerface that gives the 5 minute rate average.

Note that if the wrong bandwidth is configured on the interface, the rxload and txload will not be accurate. And the ratings of these are always against 255.

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