Ethernet Interface Configuration

Ethernet interfaces are commonly used for carrying out business-related tasks and data transmission. They are often referred to as ports.

Numbering Scheme

The numbering scheme for Ethernet interfaces in this product series is as follows: EthernetX. Here, X represents the interface number, starting from 1 and increasing incrementally. It’s important to note that the naming conventions for interfaces may vary based on the series. For instance, in enterprise-level products with 100G interfaces, the naming interval for 100G interfaces is 4. Taking the example of CX206P-48S-M-H, the interface with the number 49 is the first 100G interface, and its name is Ethernet49. The second 100G interface is named Ethernet53, and so on.

Default Configuration of Interfaces

Parameter	Default value
Interface management status	UP
Interface FEC (Forward Error Correction)	Disabled
Interface description	N/A
Interface MTU (Maximum Transmission Unit)	9216 bytes
Interface POE (Power over Ethernet) supply	Disabled
Interface LLDP (Link Layer Discovery Protocol) function	Disabled
Interface MAC address	Same as device MAC address

Basic Configuration of Interfaces

The product series supports interface speeds of 1G, 10G, 25G, and 100G. For example, the CX204Y-48GT, CX204Y-24GT, and CX206Y-48GT series default to interface speeds of 1G and 25G. The CX204Y-48S series defaults to 10G and 25G speeds. The CX206P-48GT series defaults to 10G and 100G speeds.

Operation	Command	Description
Enter the system configuration view	configure
Enter the interface view	interface ethernet ID
Set interface description	description String
Set interface speed	speed {1000\|2500\|10000\|25000}	Different types of interfaces support different configuration parameters. Please execute the speed ? command in the relevant interface view to view specific options.
Modify interface FEC mode	fec {rs\|fc}	By default, the FEC mode is disabled. The FEC mode must be consistent at both ends of the link for the interface to come up. Use the no fec command to disable the FEC mode for the interface.
Enable interface POE supply function	no shutdown	By default, the POE supply function for the interface is disabled. Use the no poe enable command to disable the POE supply for the interface

Configuring Layer 2/3 Mode Switching for Ethernet Interfaces

By default, the switch’s interfaces do not belong to any VLAN and have no IP address configured. When an interface is configured with an IP address, VRF, or other Layer 3 attributes, it automatically switches to Layer 3 mode. If you need to change the Layer 2/3 mode of an interface, you should first remove the Layer 3 attribute configurations from the interface. Afterward, execute the no router-interface command.

Operation	Command	Description
Enter the system configuration view	configure
Enter the interface view	interface ethernet ID
Switch the interface operation mode to layer 2.	no router-interface

Configuring Interface Splitting

Interface splitting refers to dividing a 100G bandwidth physical interface on the device into multiple independent lower bandwidth interfaces to meet the requirements of connecting to lower bandwidth interfaces.

The device supports splitting a 100G interface into four 1G/10G/25G interfaces. After splitting, each interface is assigned an independent identifier. For example, when a 100Ge interface like Ethernet17 is split into four 10Ge interfaces, the resulting interfaces are numbered Ethernet17 to Ethernet20.

When splitting or canceling splitting, you need to check the configurations on the interface. Clear all configurations before performing the split or cancel split operation.
After performing the split or cancel split operation, the device needs to be restarted for the changes to take effect.
The command to cancel splitting must be executed on the first interface generated after splitting.
The last two 100G interfaces of the CX532P-M series products do not support splitting. :::

Operation	Command	Description
Enter the system configuration view	configure
Enter the interface view	interface ethernet ID
Split the interface	breakout {4x25G\|4x10G\|4x1G}
Unsplit the interface	no breakout

Maintenance Interface

Operation	Command	Description
View interface description	show interface description
View interface POE supply information	show interface poe [detail]
View interface status	show interface status
View interface module information	show interface transceiver eeprom dom [ethernet ID]
View interface statistics:	show counters interface [ethernet ID]
Clear interface statistics	clear counters interface