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Supported Active Physical Ports for Configuring Rate Selectability to Prevent Oversubscription on MX10003 MPC

 

When you configure rate selectability at the MIC level, all the ports supporting that port speed are enabled by default. This can lead to fabric oversubscription in certain cases. To prevent fabric oversubscription, you can configure the number of active ports that operate at the configured speed by using the number-of-ports number-of-active-physical-ports configuration statement. Additionally, interfaces are created only for the active ports.

Note

You cannot configure the number of active ports when you configure rate selectability at the port level.

Starting in Junos OS Release 17.3R1, the MX10003 MPC supports rate selectability to prevent oversubscription of the Packet Forwarding Engine bandwidth.

Table 1 lists the active physical ports on MX10003 MPC for Configuring Rate Selectability at the MIC Level.

Table 1: Active Physical Ports on the MX10003 MPC for configuring rate selectability at the MIC level

Ports Configured (number-of-ports Statement)

Active Physical Ports for Different Configured Speeds

10-Gigabit Ethernet

40-Gigabit Ethernet

100-Gigabit Ethernet

1

0

0

0

2

0, 4

0, 4

0, 4

3

0, 4, 8

0, 4, 8

0, 4, 8

4

0, 1, 4, 8

0, 1, 4, 8

0, 1, 4, 8

5

0, 1, 4, 5, 8

0, 1, 4, 5, 8

0, 1, 4, 5, 8

6

0, 1, 4, 5, 8, 9

0, 1, 4, 5, 8, 9

0, 1, 4, 5, 8, 9

7

0, 1, 2, 4, 5, 8, 9

0, 1, 2, 4, 5, 8, 9

0, 1, 2, 4, 5, 8, 9

8

0, 1, 2, 4, 5, 6, 8, 9

0, 1, 2, 4, 5, 6, 8, 9

0, 1, 2, 4, 5, 6, 8, 9

9

0, 1, 2, 4, 5, 6, 8, 9, 10

0, 1, 2, 4, 5, 6, 8, 9, 10

0, 1, 2, 4, 5, 6, 8, 9, 10

10

0, 1, 2, 3, 4, 5, 6, 8, 9, 10

0, 1, 2, 3, 4, 5, 6, 8, 9, 10

0, 1, 2, 3, 4, 5, 6, 8, 9, 10

11

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

12

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11

Table 2 list the active physical ports on MX10003 MPC for Configuring Rate Selectability at PIC Level.

Table 2: Active Physical Ports on MX10003 MPC for configuring rate selectability at the PIC level

Ports Configured (number-of-ports Statement)

Active Physical Ports for Different Configured Speeds

10-Gigabit Ethernet

40-Gigabit Ethernet

1

0

0

2

0, 2

0, 2

3

0, 2, 4

0, 2, 4

4

0, 1, 2, 4

0, 1, 2, 4

5

0, 1, 2, 3, 4

0, 1, 2, 3, 4

6

0, 1, 2, 3, 4, 5

0, 1, 2, 3, 4, 5