Stack Port and Cable Requirements
Stack Port Requirements
Table 1-2 lists ports used for stack connections.
Item |
Requirement |
Remarks |
|---|---|---|
Type of ports used for stack connections |
|
- |
Number of stack member ports in a stack port |
1-32 |
It is recommended that you add at least two stack member ports to a stack port to improve stack link bandwidth and reliability. It is recommended that the number of member ports is the nth power of 2; otherwise, traffic may fail to be load balanced. |
NOTE:
|
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Stack Cable Requirements
Stack setup requires only common network cables or fibers but not dedicated stack cables. Optical ports are connected using high-speed cables, AOC cables, or optical modules and optical fibers; electrical ports are connected using Category 6A or Category 7 cables. For details about cables and optical modules, see "Cables" and "Optical Modules" in the CloudEngine 16800 Series Switches Hardware Description.
When setting up a stack, ensure that optical modules and cables on ports used for stack connections are properly installed and these ports are Up.
Cable |
Stacking Support |
|---|---|
10GE copper cable |
Stack ports can be connected using 10GE copper cables with a length of 1 m, 3 m, 5 m, 7 m, or 10 m. |
25GE copper cable |
Stack ports can be connected using 25GE copper cables with a length of 1 m, 3 m, or 5 m. The RS FEC function is enabled by default on an interface installed with a 25GE copper cable. If an interface is installed with a 25GE copper cable with a length of 3 m or 5 m and has the RS FEC function disabled, the interface will enter the error-down state. |
40GE copper cable |
Stack ports can be connected using 40GE copper cables with a length of 1 m, 3 m, or 5 m. |
100GE copper cable |
Stack ports can be connected using 100GE copper cables with a length of 1 m, 3 m, or 5 m. An interface installed with a 100GE copper cable with a length of 3 m or 5 m must be enabled with the RS FEC function, and will enter the error-down state if it has the RS FEC function disabled. |
10GE optical ports can be used for stack connections only when they have 10GE optical modules installed. If GE optical or copper modules are installed on 10GE optical ports, these ports cannot be used for stack connections.
- 10GE optical modules, GE optical modules, or GE copper modules can be installed in 10GE optical ports of SIP ports.
- An interface installed with a 100GE copper cable with a length of 1 m, 3 m, or 5 m cannot be split and its speed cannot be reduced to 40GE.
- If a 100GE interface is split to four 25GE interfaces and installed with a 100GE copper cable, the split interfaces are unavailable, and will become available and can be installed with 100GE copper cables with a length of 1 m, 3 m, 5 m if they are configured to work at a speed of 10GE.
- If a medium type is configured on an interface, the interface cannot be configured as a stack interface. For details on how to configure a medium type for an interface, see "Configuring the Medium Type for an Optical Interface" in the CloudEngine 16800 Series Switches Configuration - Interface Management Configuration Guide - Ethernet Interface Configuration - Configuring Optical Interface Attributes.