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Cisco Utilization calculation question

Hello Community,

Can someone please look at the following calculation used by a company called ManageEngine to calculate the utilization on a link and let me know how how I would use the calculation to calculate the utilization from the output taken from the interface on our router

Speed = (Volume in bits / time in seconds). Which is (Volume * 8 / 60) Reported in bits per second (bps).

Utilization = (current speed/ link speed) * 100. Current speed is calculated as above.

The following is the output from our interface. I would like someone to show me how to use the above calculation to get the the utilization:


T#show int tunn 0

Tunnel0 is up, line protocol is up

  Hardware is Tunnel

  Description: ** mGRE/NHRP tunnel **

  Internet address is

  MTU 17912 bytes, BW 2048 Kbit/sec, DLY 50000 usec,

     reliability 255/255, txload 34/255, rxload 92/255

  Encapsulation TUNNEL, loopback not set

  Keepalive not set

  Tunnel source 217.xx.xx.xx (FastEthernet0)

  Tunnel protocol/transport multi-GRE/IP

    Key 0x30D41, sequencing disabled

    Checksumming of packets disabled

  Tunnel TTL 255

  Tunnel transport MTU 1472 bytes

  Tunnel transmit bandwidth 8000 (kbps)

  Tunnel receive bandwidth 8000 (kbps)

  Tunnel protection via IPSec (profile "vpnprofile")

  Last input 00:00:00, output never, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/256/0/0 (size/max/drops/flushes); Total output drops: 429

  Queueing strategy: fifo

  Output queue: 0/0 (size/max)

  5 minute input rate 744000 bits/sec, 115 packets/sec

  5 minute output rate 278000 bits/sec, 101 packets/sec

     536461271 packets input, 50720742 bytes, 0 no buffer

     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

     430873111 packets output, 597245969 bytes, 0 underruns

     0 output errors, 0 collisions, 0 interface resets

     0 unknown protocol drops

     0 output buffer failures, 0 output buffers swapped out

Cisco would calculate the utilization as

txload => 34/255 = 13%

rxload => 92/255 = 36%

I don't know how ManageEngines' formula would give me the same result.

Your help will be greatly appreciated.



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