S6700-EI Service Port Stacking Support

For the cables that can be used as stack cables, see "Cables" in the Hardware Description. Using other cables may cause exceptions in the stack system, for example, frequent error-down events on stack ports.
Combo ports cannot function as stack member ports.
The number of stacked switches is recommended to be 2 to 5.

**Table 1** Service port stacking support
Device Series	Port Supporting Stacking	Stack Cable	Rate of a Single Port	Remarks
S6700-EI	All 10GE ports on the switch	1 m SFP+ passive high-speed copper cable 3 m SFP+ passive high-speed copper cable 5 m SFP+ passive high-speed copper cable (supported in V200R005C02) 10 m SFP+ active high-speed copper cable (supported in V200R001 and later versions) 3 m and 10 m AOC cables (supported in V200R003 and later versions) 10GE SFP+ optical module and optical fiber	10 Gbit/s	Any models of the S6700-EI series can set up a stack. The 10GE ports do not support the stacking function when they work as GE ports. A switch supports a maximum of two logical stack ports, and each logical stack port supports a maximum of eight stack member ports. A switch supports a maximum of eight stack member ports. On an S6700-EI switch, a maximum of eight service ports can be configured as stack member ports. Four service ports with contiguous IDs must be configured together, and the last ID of the service ports must be a multiple of 4. For example, ports 1 to 4, or 5 to 8 can be configured as stack member ports together, but ports 2 to 5 cannot. When one of the four service ports is configured as a stack member port, the other three service ports are automatically configured as stack member ports.