Port numbering/placment

[Andrey.A]

Hello,

As I'm not that familiar with Cisco equipment, I need some clarification about ports placement on card C9400-LC-48U, are ports placed like in picture I attached

Or they are scheduled in upper row: 1-6; 13-18; 25-30; 37-42 / bottom row 7-12; 19-24; 31-36; 43-48

Maybe it seems like a silly question to you, but I really need to sort this out.

Thank you all,

Andrey

[balaji.bandi]

Your picture show right direction, ODD on Top, EVEN number down.

[Reza Sharifi]

Hi,

The port numbering starts from the first port on the far left, top. So, the first port is 1/1 and the port below it will be 1/2, the next port on the top will be 1/3 and the one below is 1/4 and so on..... This is if the blade is inserted in slot 1 but if the blade is inserted in slot 2 than the first number starts with 2 e.g 2/1, 2/2, 2/3, 2/4 and so on...

HTH

[Ciprian02]

Hi Mr

Please make me understand if this is 3/0/1 on the switch ...how can I understand this port 

Thanks 

[Andrey.A]

Hi guys,

Thank you very much on fast reply. You helped me a lot!

Kind regards,

Andrey

[Reza Sharifi]

Glad to help

Good luck!

[luis_cordova]

Hi @Andrey.A 

Many switch models have the order of the ports indicated, as you can see in this image.

This order is the same on the other switches.

Regards

[Ciprian02]

Hi Mr

How can I understand the interface if its for example 3/0/1 ... how do I figure out what port it is .

Thanks 

[luis_cordova]

Hi

Three numbers are used with equipment that can use expansion cards.

G1/0/1 is switch 1, built-in device card (0) and port 1.

G5/0/28 is switch 5, built-in device card (0) and port 28.

If the switch is using expansion cards, the expansion card ports will be middle number.

Ten3/1/4 is a ten-gigabit port on switch 3, expansion card 1, port 4.

Regards

[Ciprian02]

Hi there,

[Rik van der Mark]

This is incorrect. The question is about a C9400 chassis.

In that case 3/0/1 refers to linecard 3, port 1. The 0 in the port numbering effectively has no meaning for a 9400. I think this is because of 9200 and 9300 and 9500 switches where this relevant because those have uplink modules. One a 9400 de uplink ports are located on the supervisors. There the first number would refer to it's place in the stack followed by the port being access (0) or uplinkmodule (1) followed by the port number. 

For a 9400 the port numbering becomes even longer when you configure two chassis in VSS (cluster).
Then that same card would be 1/3/0/1 or 2/3/0/1.
- The first number then refers to the number of the chassis in the VSS
- The second number then refers to the card in that chassis,
- The third number (0) again has zero meaning in the case of a 9400
- The fourth number refers to the actual port number

So getting back to the original question. 3/0/1 refers to linecard 3, port 1. Again for a 9400 the 0 in the port numbering effectively has no meaning.
Linecard 3 is the 3rd card from the top, you can also see numbering on the left next to the slot.
This (3/0/1) also means it has to be a 9410 chassis because on a 9404 or 9407 slot 3 is reserved for supervisors.

In the screenshot I added you can see the linecard numbering circled on the left. Followed by circling port 3/0/1

 

[Ciprian02]

Thanks so much Mark