Recommended Stack Deployment Scenarios
Scenario 1: The Stack System Operates on Aggregation Switches
This is the most common scenario when aggregation switches set up a stack system, as shown in Figure 3-26.
In this scenario, each switch in a stack connects to a core device through Eth-Trunk. The stack system simplifies management of aggregation devices and improves uplink reliability of aggregation devices.
Scenario 2: The Stack System Operates on Access Switches
This is the most common scenario when Layer 2 access switches set up a stack system, as shown in Figure 3-27.
In this scenario, each switch in a stack connects to an aggregation device through Eth-Trunk. The stack system simplifies management and improves uplink reliability of access devices.
Scenario 3: The Stack System Operates on an Access Ring
This scenario rarely occurs. Figure 3-28 shows the networking of this scenario.
In this scenario, multiple stack systems form a ring through Eth-Trunk, and one stack system connects to aggregation switches through Eth-Trunk. This scenario reduces the number of management IP addresses of access devices.
Recommendations
The following recommendations are provided based on the positioning of fixed switch models. If customers have special requirements, it is recommended to deploy high-end devices at a lower network layer; it is not recommended to deploy low-end devices at a higher network layer. For example, it is recommended to deploy aggregation switches at the access layer rather than to deploy access switches at the aggregation layer.
- Ensure that each member device connects to the core device through an uplink port. This connection prevents upstream traffic forwarding from being affected when any member device fails.
- When using multiple devices to set up a stack, ensure the same stack bandwidth between any two devices. Otherwise, the bandwidth of the stack system is the minimum stack bandwidth.
Model |
Scenario 1 |
Scenario 2 |
Scenario 3 |
|---|---|---|---|
S5700-HI, S5710-HI, S5710-EI, S6700-EI |
First preferred |
Second preferred |
Not recommended |
S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731S-H, S5732-H, S6720-EI, S6720S-EI, S6720-HI, S6730-H, S6730S-H |
First preferred |
Second preferred |
Second preferred |
S5700-EI, S5700-SI |
First preferred |
First preferred |
Second preferred |
S5720-SI, S5735-S, S5735S-S S5720S-SI, S5720I-SI, S5731-S, S5731S-S, S6730-S, S6730S-S |
Second preferred |
First preferred |
First preferred |
S2720-EI, S2750-EI, S5700-LI, S5720-LI, S5735-L, S5735S-L, S5735S-L-M, S5720S-LI, S5730-SI, S5735S-H, S5736-S, S5730S-EI, S6720-LI, S6720S-LI, S6720-SI, S6720S-S, S6720S-SI |
Not recommended |
First preferred |
Second preferred |
S5700S-LI, S5710-C-LI, S5710-X-LI |
Not recommended |
First preferred |
First preferred |