stack port speed
Function
The stack port speed command sets the working speed for stack member ports.
The undo stack port speed command restores the working speed of stack member ports to the default value.
For the default working speeds of stack member ports on different switch models, see "Stack Support and Version Requirements" in Stack Configuration in the S2720, S5700, and S6700 V200R019C10 Configuration Guide - Device Management.
- Only the S5720-X-LI, S5720I-SI, S5720S-SI, S5720S-X-LI, S5720-SI, S5730S-EI, S5730-SI, S6720-HI, S6720-LI, S6720S-LI, S6720S-SI, and S6720-SI support this command.
- The S5720-P-LI does not support this command before the license is loaded and supports this command after the license is loaded and it restarts.
- The S5730S-EI and S5730-SI do not support this command when using stack cards to set up a stack.
Parameters
Parameter |
Description |
Value |
|---|---|---|
48G |
Sets the working speed of stack member ports to 48 Gbit/s. This speed can be set only on the S5730-SI, S5730S-EI, S6720-LI, S6720S-LI, S6720-SI, and S6720S-SI. |
- |
40G |
Sets the working speed of stack member ports to 40 Gbit/s. This speed can be set only on the S6720-HI. |
- |
12G |
Sets the working speed of stack member ports to 12 Gbit/s. This speed can be set only on the S5720-P-LI, S5720-X-LI, S5720I-SI, S5720S-SI, S5720S-X-LI, and S5720-SI,. |
- |
2.5G |
Sets the working speed of stack member ports to 2.5 Gbit/s. This speed can be set only on the S5720-P-LI, S5720-X-LI, and S5720S-X-LI. |
- |
Usage Guidelines
Usage Scenario
On the S5720-P-LI, S5720-X-LI, S5720I-SI, S5720S-SI, S5720S-X-LI, and S5720-SI,, if optical ports are used as stack member ports and are connected using 1 m or 3 m SFP+ passive copper cables, you can use this command to increase their working speed from 10 Gbit/s to 12 Gbit/s, expanding the stack bandwidth. After their working speed is increased to 12 Gbit/s, switches using these ports cannot set up a stack with switches using ports with the working speed 10 Gbit/s.
On the S5730-SI, S5730S-EI, S6720-LI, S6720S-LI, S6720-SI, and S6720S-SI, if 40GE optical ports are used as stack member ports and are connected using 1 m, 3 m or 5 m QSFP+ passive copper cables, you can use this command to increase their working speed from 40 Gbit/s to 48 Gbit/s, expanding the stack bandwidth. After their working speed is increased to 48 Gbit/s, switches using these ports cannot set up a stack with switches using ports with the working speed 40 Gbit/s.
On the S6720-HI, if 100GE optical ports are used as stack member ports and are connected using 1 m, 3 m and 5 m QSFP+ passive cables or QSFP+ optical modules and fibers, you can use this command to reduce their working speed from 100 Gbit/s to 40 Gbit/s. After their working speed is reduced to 40 Gbit/s, switches using these ports can set up a stack with the S6720-HI using ports with the working speed 40 Gbit/s and cannot set up a stack with the S6720-HI using ports with the working speed 100 Gbit/s.
On the S6720-SI, only the rate of 40GE interfaces on the front panel can be increased to 48 Gbit/s.
If S5720-P-LI, S5720-X-LI, and S5720S-X-LI switches use XGE optical ports to stack with other switches that have GE optical ports, use this command to reduce the working speed of the XGE optical ports from 10 Gbit/s to 2.5 Gbit/s, so that the XGE optical ports can work with the remote GE optical ports.
Precautions
After changing the working speed of stack member ports, you need to restart the switch for the new speed to take effect.