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Configuring Rate Selectability on MX10003 MPC to Enable Different Port Speeds

 

Rate selectability enables you to configure the port speed either at the port level or at the MIC level. To configure all ports to operate at the same speed, configure rate selectability at the MIC level, in which case you cannot configure the speed of individual ports. To configure rate selectability at the MIC level, use the pic-mode statement and specify the port speed. To configure different port speeds for each port, configure rate selectability at the port level, in which case only the ports that are configured are enabled. To configure rate selectability at the port level, use the speed statement to specify the speed of individual ports. This topic describes how to configure port speeds at the port level and at the MIC or PIC level.

Note

Regardless of the line card— MIC (PIC1) or fixed-port PIC (PIC0) installed —you must configure both the PICs and all the associated ports, under the [edit chassis] hierarchy. Configuring ports on only one of the PICs results in an invalid configuration.

Configuring Rate Selectability on MX10003 MPC at MIC/PIC Level

To configure all ports to operate at the same speed, configure rate selectability at the MIC or PIC level. When you configure rate selectability at the MIC or PIC level, all the ports of the MIC that support the configured speed operate at that speed. To prevent oversubscription and to ensure a guaranteed bandwidth, specify the number of active ports that operate at the configured speed by using the number-of-ports number-of-active-physical-ports statement. The MX10003 MPC supports port speeds of 10 Gbps, 40 Gbps, and 100 Gbps.

To configure rate selectability at the MIC/PIC level:

  1. In configuration mode, navigate to the [edit chassis fpc fpc-slot pic pic-number] hierarchy level.

    For example:

  2. Configure the pic-mode pic-speed statement to set the operating speed for the MIC. All ports of the MIC that support the configured speed operate at the configured speed. Values for the pic-speed option are 10G, 40G, and 100G.

    For example:

  3. (Optional) To prevent oversubscription, you can choose to configure the number of active ports that operate at the port speed configured in Step 2. For information about the number of active ports and specific port numbers on the MX10003 MPC , see Supported Active Physical Ports for Configuring Rate Selectability to Prevent Oversubscription on MX10003 MPC.

    For example:

  4. Verify the configuration.
  5. Commit your configuration changes.

In this example, you have configured 8 ports on the MPC with port speed of 10 Gbps. The other ports are disabled.

Configuring Rate Selectability on MX10003 MPC at Port Level

To configure different port speeds for each port, you configure rate selectability at the port level. Only the ports that are configured are enabled. Other ports are automatically disabled. Configuring rate selectability at the port level provides you the flexibility of operating individual ports of the PIC at different supported speeds.

If you want to configure a port speed of 40 Gbps on the MIC and the fixed-port PIC, you can choose any of the following example configurations:

  • Configure one port of the fixed-port PIC as a 40-Gigabit Ethernet interface and three ports of the MIC as 40-Gigabit Ethernet interfaces.

  • Configure two ports of the fixed-port PIC as 40-Gigabit Ethernet interfaces and three ports of the MIC as 40-Gigabit Ethernet interfaces.

  • Configure three ports of the MIC as 40-Gigabit Ethernet interfaces and two ports of the fixed-port PIC as 40-Gigabit Ethernet interfaces.

  • Configure four ports of the MIC as 40-Gigabit Ethernet interfaces only.

Note

While configuring rate selectability, when you switch to PIC mode from port mode or vice-versa, the PIC is reset automatically. However, when you change the port speed at the port level, the PIC has to be reset by executing the request chassis pic pic-slot mic-slot-number fpc-slot fpc-slot-number (offline | online) command. For guidelines on configuring rate selectability, see Guidelines for Configuring Rate Selectability.

To configure rate selectability at the port level:

  1. In configuration mode, navigate to the [edit chassis fpc fpc-slot pic pic-number] hierarchy level.

    For example:

  2. To indicate the speed at which the ports operate, configure the speed statement for the desired ports. According to your requirements, you can choose the 10G, 40G, and 100G speed options.

    For example:

  3. Verify the configuration.
  4. Commit your configuration changes.

In this example, you have configured 2 ports with port speed of 10 Gbps and 1 port with port speed of 40 Gbps.

Note

Starting in Junos OS Release 18.1R1, the 10-Gbps port can operate in 1-Gbps mode also using the speed (Gigabit Ethernet interface) configuration statement at Gigabit Ethernet interface level. Refer to MX10003 MPC Rate-Selectability Overview for more details.