Chasis Number and Show Controller

Q1 Assume that the interface is 0/1/2

0 = chasis number
1 = slot number
2 = port number.

Does anyone know when the chasis number can ever be changed. It is always zero.

Q2 Does anyone know why troubleshooting is done on the physical card layer such as show controller??

If a card is faulty, I change the entire card. I dont need to troubleshoot what is wrong with the processor.

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jinxer

If you stack switches it'll change for instance

vinbuck

hitmen wrote: »

Q1 Assume that the interface is 0/1/2

0 = chasis number
1 = slot number
2 = port number.

Does anyone know when the chasis number can ever be changed. It is always zero.

Q2 Does anyone know why troubleshooting is done on the physical card layer such as show controller??

If a card is faulty, I change the entire card. I dont need to troubleshoot what is wrong with the processor.

You need to understand things like timing, line buildout, clocking, etc to be able to effectively troubleshoot at layer 1. When I worked in the provider world, I spent the vast majority of my time troubleshooting at Layer 1 due to storms, floods and heat - all of which are not kind to networks

You don't want to keep changing cards when there is a problem on the carrier side - that gets expensive

hitmen

Pardon me but do you mean by carrier side? Provider edge routers?

xXErebuS

hitmen wrote: »

Pardon me but do you mean by carrier side? Provider edge routers?

I think what vinbuck means is... for example... you don't want to keep changing blades out when there is an issue with the chassis.

However, it wouldn't be the first time nor last time I was wrong about something.