Cisco Press CCDA symbology

tech-airman

What does the "Layer 3 switch" symbol with the letters "Si" in the core (attempting a little CCDA humor) mean?

mikej412

Ah.... core.... Si in the symbol -- I get it

I'd say Si is Standard Image..... is there an Ei one too (for Enhanced Image)?

dtlokee

They use the Si for the "silicon switching", I guess it's a bit dated but that is how they would represent a switch doing L3 switching in hardware. Now I think it goes without saying that multilayer switching is done in hardware. They also used a switch icon with an extra bit on the bottom that had 4 rectangles with lines between them to represent a L3 switch with the MFFC installed (going back to the 5000/5500 here)

ITdude

Wow!, you really are a veritible fountain of knowledge!

tech-airman

dtlokee wrote:

They use the Si for the "silicon switching", I guess it's a bit dated but that is how they would represent a switch doing L3 switching in hardware. Now I think it goes without saying that multilayer switching is done in hardware. They also used a switch icon with an extra bit on the bottom that had 4 rectangles with lines between them to represent a L3 switch with the MFFC installed (going back to the 5000/5500 here)

dtlokee,

Do you mean "silicon switching" in terms of those methods of switching above and beyond: 1) store and forward 2) cut through 3) fragment free ? The "switching methods" that were in the Routing/BSCI materials that confused me when switching was mentioned in the routing materials? If so, then a just lit in my head. I have this recollection of "process switching" as another switching method.