Port Numbering Conventions
Physical ports are numbered in the following way:
- Slot ID: indicates the slot where the switch is located. The value is 0.
- Subcard ID: indicates the ID of a subcard. The default value is 0 for models without subcards.
- Port sequence number: indicates the sequence number of a port on the switch.
- Stack ID: indicates the ID of a stacked switch. The value ranges from 0 to 8.
- Subcard ID: indicates the ID of a subcard. The default value is 0 for models without subcards.
- Port sequence number: indicates the sequence number of a port on the switch.
Port Numbering Diagram |
Description |
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There are two rows of service ports on the device. These ports are numbered from bottom to top and left to right, starting from 1. For example, the port on the top left is numbered 0/0/2. Ports of different speeds are numbered separately. For example, the first 100M port is numbered Ethernet 0/0/1, the first GE port is numbered GigabitEthernet 0/0/1, the first 10GE port is numbered XGigabitEthernet 0/0/1, and the first 40GE port is numbered 40GE 0/0/1. Ports with the same rate are numbered in ascending order. |
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) + z + 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.
- z: indicates the interface location. The value ranges from 0 to 3.
- 25GE interfaces converted from a 100GE interface are numbered based on the number of the last 25GE interface on the switch. Because only the 100GE interfaces on cards support interface split, if a 100GE interface to be split is numbered 100GE 0/y/n, the four 25GE interfaces converted from the 100GE interface are numbered 25GE 0/y/(4 * (n - 1) + z + 1). For example, the four 25GE interfaces converted from 100GE 0/1/1 on a card are numbered 25GE 0/1/1, 25GE 0/1/2, 25GE 0/1/3, and 25GE 0/1/4.
- 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.
- z: indicates the interface location. The value ranges from 0 to 3.
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.
After the interface rate increases, the interface numbering rule is as follows:
- On the S5736-S48S4X-A and S5736-S48S4X-D, the subcard ID of the 48 1000BASE-X Ethernet optical interfaces is 0, and the interface rate is increased to 10 Gbit/s after an RTU license for interface rate improvement is loaded. To prevent subcard ID conflicts, the subcard ID of the previous four 10GE SFP+ Ethernet optical interfaces is fixed at 1.
- On the S6730-H24X4Y4C, the subcard ID of the 24 10GE SFP+ Ethernet optical interfaces is 0. After an RTU license for interface rate improvement is loaded, the interface rate is increased to 25 Gbit/s, the subcard ID becomes 1, and the subcard ID of the previous four 1GE/10GE/25GE SFP28 Ethernet optical interfaces remains at 0.
For the S5731-H and S5731S-H optical-electrical hybrid models, the four 10GE optical-electrical hybrid ports and the four 10GE SFP+ Ethernet optical ports have the same sequence numbers and are distinguished by subcard ID. The subcard ID of the four 10GE optical-electrical hybrid ports is 1, the subcard ID of the four 10GE SFP+ Ethernet optical ports is 2, and the subcard ID of the rear card lost is 3.
Table 4-4 describes the CSFP port numbering conventions.
Port Numbering Diagram |
Description |
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For example, an S5700-52X-LI-48CS-AC has 24 physical ports located in two rows of service ports, 12 ports in each row. When all the ports have SFP optical modules installed, the ports are numbered as follows:
For example, with SFP optical modules installed, the first port at the lower left of the panel is numbered 0/0/3; the second port at the lower left is numbered 0/0/7; the first port at the upper left is numbered 0/0/2; the second port at the upper left is numbered 0/0/6. |
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When all the ports have CSFP optical modules installed, each port functions as two ports. The switch has a total of 48 ports in this case. These ports are numbered starting with 1 from bottom to top, and left to right. For example, if a CSFP optical module is installed on the first port at the lower left, the port is split into two ports numbered 0/0/1 and 0/0/3. If a CSFP optical module is installed on the first port at the upper left, the port is split into two ports numbered 0/0/2 and 0/0/4. |
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If some ports on the switch use CSFP optical modules and some use SFP optical modules, the ports are numbered following the respective numbering conventions. Assume that the first port at the lower left uses a CSFP optical module and the second port at the upper left uses an SFP optical module. In this case, the two ports derived from the first CSFP port are numbered 0/0/1 and 0/0/3, and the second SFP port is numbered 0/0/6. |
