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How to know which interfa...

How to know which interface of a switch links to another switch?

Created: Nov 2, 2020 18:56:11Latest reply: Nov 5, 2020 10:49:32 518 7 1 0 0
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In SDH networks, the J0 byte is used to identify path. Is there something similar in both level 2 and 3 packet networks?

switchlink

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DDSN
Admin Created Nov 3, 2020 03:18:11

Hi lucian2003, 

You can use the port description command to configure the description of an interface, including the type of the device connected to the interface.

I hope it helps!

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ariase88
ariase88 Admin Created Nov 2, 2020 19:13:17

Thanks for contacting us. We will provide an answer to You shortly.

Regards
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DDSN
DDSN Admin Created Nov 3, 2020 03:18:11

Hi lucian2003, 

You can use the port description command to configure the description of an interface, including the type of the device connected to the interface.

I hope it helps!

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IbrYsf
IbrYsf Created Nov 4, 2020 09:30:09

the Link Layer Discovery Protocol (LLDP) should detect if another LLDP enabled device is connected to the switch. as I understand the question right.

Switch] lldp enable # to enable lldp on the switch

switch> display lldp neighbors brief # shows lldp enabled connected devices
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lucian2003
lucian2003 Created Nov 4, 2020 12:42:05 (0) (0)
Hello, I mean if there is a header byte to identify the path, that is, I send the word welcome and I have to receive it on the other port.  
IbrYsf
IbrYsf Reply lucian2003  Created Nov 4, 2020 19:09:56 (0) (0)
misleading post title; out of my scope, apologies for the inconvenience.  
lucian2003
lucian2003 Reply IbrYsf  Created Nov 4, 2020 21:20:58 (0) (0)
 
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Peterhof
Peterhof Author Created Nov 5, 2020 10:49:32

I think that you can use display mac-address to find the interface with attached mac of the sender. Also interfaces with a lot of addresses are connected to the switches :)
If you are looking for some address that you know then you can filter the output with | inc PARTofMAC
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