show int Te1/1/4 human-readable

[M_Neman]

Hallo everyone,

i just have a basid question, below is the show interface Te1/1/4 human-rea output of c9300 Switch,

show int Te1/1/4 human-readable
TenGigabitEthernet1/1/4 is up, line protocol is up (connected)
Hardware is Ten Gigabit Ethernet, address is cc90.7002.afgh (bia cc90.7002.afgh)
Description: xyz
MTU 1500 bytes, BW 10000 Kbit/sec, DLY 100 usec,
reliability 255/255, txload 13/255, rxload 35/255
Encapsulation ARPA, loopback not set
Keepalive not set
Carrier delay is 0 msec
Full-duplex, 100Mb/s, link type is auto, media type is 10/100/1000BaseTX SFP
input flow-control is on, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 00:01:24
Input queue: 0/375/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: Class-based queueing
Output queue: 0/40 (size/max)
5 minute input rate 1.38 mega-bits/sec , 264 pps
5 minute output rate 539.0 kilobits , 214 pps
13,714 packets input, 5,992,134 bytes, 0 no buffer
Received 114 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 113 multicast, 0 pause input
0 input packets with dribble condition detected
15,208 packets output, 5,881,633 bytes, 0 underruns
Output 0 broadcasts (0 IP multicasts)
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output0 output buffer failures, 0 output buffers swapped out

this is a Metro Ethernet link to another location, the BW is 10Mbps hardcoded.

my question is, how do i calculate the current bandwith utilisation from txload and rxload values ? are they based on the 10Mb BW we have hardcoded on the interface or are they based on the actual interface hardware ?

Thanks,

[M02@rt37 · Accepted solution]

Hello @M_Neman 

The actual port is a TenGigabitrthernet, meaning it's physically capable of 10 Gbps, but the Bw alue is used by the switch for load calculation, QoS, and routing protocol metrics. You can set this manually using:

interface TenGigabitEthernet1/1/4
bandwidth 10000

The txload/rxlaod values shown in the output are relative to the configured bandwidth value on the interface, not the physical hardware speed...

[M_Neman]

Thank you very much, it helped me alot. but how do i calculate the load i mean if the txload is 33/255 does it mean 33 % of 10 Mbps ? or in other words, what does this value 255 means ?

[M02@rt37 · Accepted solution]

To calculate load:

load = (rate / bw) x 255

To calculate utilization from load:

utilization in % = (load / 255 ) * 100

--

Regarding value 255, it a normalized scale maximum _ it represents 100% utilization of interface's configured Bw. Utilization is stored as an 8-bit integer....so the max value of an 8-bit unsigned integre is 255.

Other post:

https://community.cisco.com/t5/switching/txload-and-rxload-relationship-to-input-rate-output-rate/td-p/2004028