In Cisco switch, what are these physical port groups called?

[ruyelpequenocid]

(see picture included in this post)

In a 48-port switch, four divisions are apparent. Sometimes half the switch goes bad (i.e. ports Gi1/0/25 to Gi1/0/48) while the first 24 ports continue to work just fine. What are these sections called?

[Leo Laohoo]

Switch ports.  

There is no "division" or segregation involved.  

"behind" those ports is an ASIC.  

[ruyelpequenocid]

Thanks Leo Laohoo.

In a 48-port switch like the 9300 series... is it one ASIC for all 48 copper ports?

[Leo Laohoo]

I could be mistaken but the 48-port 9300 may have 2 ASICs.

[sphillips]

I believe it is called an asic. Each asic consists of 8 ports. I recently
had a power surge and 8 ports wouldn't come up. I was using sfp
transceivers (10GBASE-T SFP+ Copper RJ-45 30m Industrial Transceiver Module
for FS Switches) in all 8 ports. I had to RMA the switch. After the new
switch came, it too was having an issue with an asic group but a different
group of 8. I believe I have determined its a problem with the sfp and
technically not the switch. You can run into problems using third party
sfps. If I ran a reload command or hard reset the switch with the sfps
plugged in, the devices wouldn't come up no matter what I did. If I ran a
reload or hard reset without the sfps plugged in and waited a couple of
mintues after the reboot cycle and then plugged them in, the devices worked
fine. I'm not sure if this could be the issue for you bur thought I would
advise. Thanks!

[sphillips]

By the way, it was happening on a 9300. 

[ruyelpequenocid]

Yeah, thanks Leo Laohoo, thanks sphillips. 

I think we need someone to come in here and really explain this. I cannot find anything specific that shows a relationship specific between a group of ports and a specific ASIC. 

All Cisco documentation I see talks about ASIC from the logical perspective, but I cannot find anything that specifically connects that to the specific ports by name/number.

I had the same problem as sphillips, multiple times, "a portion" of a Catalyst switch will stop working, just regular Gi copper ports, the whole section just quits (for example, from Gi0/25 to Gi0/48).... We've seen it in an older WS-C6504-E, a WS-C3850-48P and even in newer C9300-48P.

When this happens we RMA that switch.... Fine.

But I was hoping to gain a better understanding of how those divisions work and what are the specific technical names for it.