This document is only available for S4148 series switch.
The six interfaces of QSFP+ and QSFP28 on the switch, with port numbers from 25 to 30, form an interface group. You can configure the port mapping mode of this interface group as required, the value could be 6 x 40G or 4 x 100G.
- 6 x 40G: This is the default port mapping mode. In this mode, all the six interfaces work at 40G mode. The interface names are xe-1/1/1, xe-1/1/2, xe-1/1/3, xe-1/1/4, xe-1/1/5 and xe-1/1/6.
- 4 x 100G: In this port mapping mode, the four QSFP28 interfaces numbering 25, 26, 29 and 30 work at 100G mode and the other two QSFP+ interfaces numbering 27 and 28 are unavailable. In this mode, the interface names of the four QSFP28 interfaces are xe-1/1/1, xe-1/1/2, xe-1/1/3 and xe-1/1/4.
- From the Linux shell prompt, run the following command.
Type the option number at the “Enter your choice(1,2):” prompt and press Enter to select the port mapping mode.
The example below shows the steps for configuring the port mapping mode as 4 x 100G.
Step1 From the Linux shell prompt, run picos_boot port-layout command to configure the port mapping mode to 4x100G.
Step2 Type “2” and press Enter to set the port mapping mode to 4x100G_QSFP. By default, the port mapping mode is set to 6x40G_QSFP.
Step3 Manually remove the user configuration files.
After changing the port mapping mode and before restarting PICOS, you need to manually remove the user configuration files /pica/config/pica_startup.boot and /pica/config/pica.conf.
Step4 After changing the port mapping mode, you need to restart PICOS to make the setting take effect.
Verify the configuration
- After the system boots, run run show interface brief command to view the interface information.
In 4x100G_QSFP mode, we can see that the four QSFP28 interfaces numbering 25, 26, 29 and 30 are working at 100G, and the other two QSFP+ interfaces numbering 27 and 28 are unavailable. The interface names of the four QSFP28 interfaces are xe-1/1/1, xe-1/1/2, xe-1/1/3 and xe-1/1/4.