Huawei Data Center Switch includes CloudEngine CE12800, CE12800E, CE1800V, CE5800, CE6800, CE7800, CE8800 Series. In this article, HongTelecom will introduce the Huawei CE12800 Series Switches Port Numbering.
On the CE12800 series switches, ports are numbered in the format of stack member ID/slot ID/subcard ID/port sequence number.
- Stack member ID: 1 or 2
A port number does not contain the stack member ID if the switch is not in a stack.Two CE12800 series switches can set up a cluster switch system (CSS). You can identify the master and standby chassis in a CSS by observing the STACK indicators on the MPUs in the two chassis.
- Any two of the CE12804, CE12808, CE12812, and CE12816 chassis can set up a CSS.
- A CE12804S chassis and a CE12808S chassis can set up a CSS.
- A CE12804/CE12808/CE12812/CE12816 chassis and a CE12804S/CE12808S chassis cannot set up a CSS.
- Slot ID
The slot ID identifies in which slot a card is installed.
- Subcard ID
Cards on the CE12800 series switches do not support subcards, so the subcard ID is always 0.
- Port sequence number
The port sequence number indicates the number of each port on a card.
- If there is only one row of ports on a card, these ports are numbered from left to right starting from 0.
- If there are two rows of ports on a card, these ports are numbered from top to bottom and left to right starting from 0.
After a 100GE/40GE port is split into multiple 40GE or 10GE ports, these 40GE or 10GE ports are numbered following the conventions described in Table 1.
|Port Type||Original Port Number||Port Number After Split|
|40GE port||40GE x/y/N
N is the sequence number of the 40GE port.
|After the 40GE port is split into four 10GE ports or two 10GE ports, the 10GE ports are numbered in the 40GE x/y/N:M(10GE) format, where:
|100GE port||100GE x/y/N
N is the sequence number of the 100GE port.
|After the 100GE port is split into 40GE ports, the 40GE ports are numbered in the 100GE x/y/N:M(40GE) format, where:
|After the 100GE port is split into four 25GE ports, the 25GE ports are numbered in the 100GE x/y/N:M(25GE) format, where:
|After the 100GE port is split into 10GE ports, the 10GE ports are numbered in the 100GE x/y/N:M(10GE) format, where:
Interface Rate Description
The interface rate is the rate at which an interface transmits data. To meet various transmission rate requirements, pluggable modules with different rates are provided, including 100GE, 40GE, 25GE, 10GE, GE, and FE optical modules, as well as GE copper modules. Generally, the rate supported by an interface corresponds to the rate of the pluggable module on the interface, but it is also affected by the following factors:
Interface Rate Auto-Sensing
Typically, interface rate auto-sensing allows an interface to automatically work at the rate of a medium when the medium is installed. You do not need to manually run a command to change the interface rate. For example, the default rate of an interface on a CE-L36CQ-FD card is 100Gbit/s. When a QSFP+ optical module is installed on the interface, the interface automatically works at the rate of 40Gbit/s.
Different from auto-sensing, auto-negotiation provides a mode of exchanging information between two interfaces on connected devices. You can connect the two interfaces through media that support rate auto-negotiation so that some interface attribute settings can be negotiated and the two interfaces can automatically configure their transmission capabilities. The duplex mode, rate, and FEC of the two interfaces are negotiated. Interfaces at both ends of a physical link automatically select the same operating parameter settings by exchanging information. In this way, the transmission capabilities of the interfaces can reach the maximum supported by them. For example, the default rate of an interface on a CE-L48XS-EA card is 10 Gbit/s. After a GE copper module is installed, the interface supports auto-negotiation and the rates of 10 Mbit/s, 100 Mbit/s, and 1000 Mbit/s. Assume that the interface is connected to a server’s network adapter interface that supports auto-negotiation and the rate of 100 Mbit/s. The two connected interfaces can negotiate to work at the rate of 100 Mbit/s through auto-negotiation.
Interface split allows a high-bandwidth physical interface on the switch to be split into multiple independent low-bandwidth interfaces. With the interface split function, interfaces on a card can connect to various types of interfaces on the remote device, allowing for flexible networking and lowering hardware costs. For example, a 40GE interface on a CE-L36LQ card can be split into four 10GE interfaces.
Interface split is classified into dynamic split and static split. If dynamic split is configured, the configuration takes effect immediately without the need of resetting the card. You can check whether dynamic split is supported according to the displayed message. After the port split command is run:
Static split: If the message “Warning: This operation will delete current port(s) and create new port(s). New port(s) will be offline before the board of slot 1 is reset.” is displayed, the card needs to be reset and converted interfaces take effect after the reset.
Dynamic split: If the message “Warning: This operation will delete current port(s) and create new port(s).” is displayed, the card does not need to be reset and converted interfaces take effect immediately.
After the port split command is run on an interface of a card that does not support dynamic split, the interface is split, is in Offline state, and supports service configurations. After the card is reset, converted interfaces go Up and the configurations delivered when the split interface is in Offline state take effect.
Interface Rate Configuration
In addition to the preceding methods, you can also run commands to change the interface rate. For details, see “Configuring the Interface Rate” in the CloudEngine 12800 and 12800E Series Switches Configuration Guide – Interface Management Configuration Guide – Ethernet Interface Configuration – Configuring Common Optical/Electrical Interface Attributes.
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