port split

Usage Scenario

Some 40GE optical interfaces can be used as independent interfaces or each can be split into four 10GE interfaces. With the interface split function, a device with 40GE interfaces can provide high-density 10GE interfaces, and can connect to 40GE or 10GE interfaces on the remote device. This function allows for flexible networking and lowers hardware costs.

To split an interface, run the port split split-type 40GE:4*XGE command in the view of the 40GE interface. To merge converted interfaces into the original 40GE interface, run the undo port split command in the view of only one of the four 10GE converted interfaces.

• If interface split or merge is configured on an interface, the original configuration on the interface is lost. Therefore, exercise caution when deciding to perform the interface split or merge operation.

• 10GE interfaces converted from a 40GE interface are numbered based on the number of the last 10GE interface on the switch. For interfaces on the switch panel, if the last 10GE interface is numbered XGE 0/y/m and a 40GE interface to be split is numbered 40GE 0/y/n, the four 10GE interfaces converted from the 40GE interface are numbered XGE 0/y/(m + 4 * (n - 1) + 1). For example, if the last 10GE interface on a switch is numbered XGE 0/0/48, the four 10GE interfaces converted from 40GE 0/0/3 are numbered XGE 0/0/57, XGE 0/0/58, XGE 0/0/59, and XGE 0/0/60. For interfaces on a card, m has a fixed value of 0. For example, the four 10GE interfaces converted from 40GE 1/1/1 on a card are numbered XGE 1/1/1, XGE 1/1/2, XGE 1/1/3, and XGE 1/1/4.

  • y: indicates the subcard number.
  • m: indicates the sequence number of the last 10GE interface on the switch.
  • n: indicates the sequence number of the 40GE interface.
  

  Split interfaces are numbered in the same sequence as the wires of a cable are numbered. For example, in a 1-to-4 cable, the wire numbered 1 corresponds to the interface with the lowest interface number, and the wire numbered 4 corresponds to the interface with the highest interface number.

• If an interface is split, the interface and converted interfaces cannot be added to a stack interface, regardless of whether the configuration takes effect. If an interface has been added to a stack interface, the interface cannot be split.
• After configuring interface split using the port split split-type 40GE:4*XGE command, or using the undo port split command, restart the device to make the configuration take effect. You can run the display port split command in any view to check the status of a split interface.