interface name FastEthernet0/4 or FastEthernet1/0/4

[pdenableetoavit19698]

Hi there,

Trying to have a better understanding on how this interfaces are named

when are they named like this 0/4 ?

and when like this 1/0/4?

while I get the last digit is the no. of the port, what are the other digits standing for? no of the switch? and?

thanks for any tips

[DanielP211 · Accepted solution]

Hello,

The explanation should be like this. The Fastethernet/ethernet/gigbitethernet is the speed, and the numbers are:

Gig2/0/32
<switch>/<module>/<switchport>

Is Switch 2 (inside stack), Module 0 (only one module on the switch), port 32.

BR

[DanielP211]

*The module can also be module/slot number.

[marce1000]

 -  Interface  FastEthernet1/0/4 indicates 1st module of the switch and its port number 0/4 ; so the 3 digits are used when you have multiple modules , 

 M.

[Emeka Ejinkeonye]

A standard switch you are used to usually come with the ethernet/fastethernet/gigethernet ports bundles with the device. so they are usually names as bundled/port. so if you are interested in the 5th port of a 24-port switch for example, it is 0/5. however, a lot of Cisco Hardwares come with modular bays, ie empty slots where you can fit in different media cards. now assume you have a hardware with 2 media bays (bay 1 and bay 2) in addition to the bundled ports. if you buy a 24 port fast ethernet card and slot it into bay 1, and again you are interested in the 5th port of the new card, it is designated as fastethenet 1/0/4, if on the other hand you slotted it into bay 2, you have fae2/0/5