Example for Establishing a Stack Through Service Port Connections Using Ordinary Stack Cables
Networking Requirements
An enterprise network needs to provide a sufficient number of ports to access devices, but a simple network structure is required to facilitate configuration and maintenance.
As shown in Figure 1, SwitchA, SwitchB, and SwitchC need to set up a stack with a ring topology and connect to SwitchD through inter-device Eth-Trunks. SwitchA, SwitchB, and SwitchC are the master, standby, and slave switches respectively, with stack IDs of 0, 1, and 2 and stack priorities of 200, 100, and 100. As they function as a single logical device on the network, the number of ports increases while keeping network management and maintenance relatively simple.
The S5720-LI series switches are used on the network.
Configuration Roadmap
Configure logical stack ports and add physical member ports to the corresponding logical stack ports to enable packet forwarding between member switches.
Configure stack IDs and stack priorities for member switches to facilitate management.
Power off SwitchA, SwitchB, and SwitchC. Connect physical member ports using SFP+ stack cables according to Figure 1 and power on the switches.
Configure inter-device Eth-Trunks to increase reliability and uplink bandwidth.
Physical member ports in stack-port n/1 of one switch can only be connected to the ports in stack-port m/2 of a neighboring switch.
If SwitchA, SwitchB, and SwitchC are different switch models, these models must be able to set up a stack together. For details, see Stack Support and Version Requirements.
During a stack setup, the software version used by the master switch takes effect, and the standby and slave switches synchronize their software versions with the software version of the master switch.
Procedure
- Configure logical stack ports and add physical member ports to them.
# Configure the service ports GigabitEthernet0/0/27 and GigabitEthernet0/0/28 on SwitchA as physical member ports and add them to the corresponding logical stack ports.
<HUAWEI> system-view [HUAWEI] sysname SwitchA [SwitchA] interface stack-port 0/1 [SwitchA-stack-port0/1] port interface gigabitethernet 0/0/27 enable Warning: Enabling stack function may cause configuration loss on the interface. Continue? [Y/N]:y Info: This operation may take a few seconds. Please wait. [SwitchA-stack-port0/1] quit [SwitchA] interface stack-port 0/2 [SwitchA-stack-port0/2] port interface gigabitethernet 0/0/28 enable Warning: Enabling stack function may cause configuration loss on the interface. Continue? [Y/N]:y Info: This operation may take a few seconds. Please wait. [SwitchA-stack-port0/2] quit
# Configure the service ports GigabitEthernet0/0/27 and GigabitEthernet0/0/28 on SwitchB as physical member ports and add them to the corresponding logical stack ports.
<HUAWEI> system-view [HUAWEI] sysname SwitchB [SwitchB] interface stack-port 0/1 [SwitchB-stack-port0/1] port interface gigabitethernet 0/0/27 enable Warning: Enabling stack function may cause configuration loss on the interface. Continue? [Y/N]:y Info: This operation may take a few seconds. Please wait. [SwitchB-stack-port0/1] quit [SwitchB] interface stack-port 0/2 [SwitchB-stack-port0/2] port interface gigabitethernet 0/0/28 enable Warning: Enabling stack function may cause configuration loss on the interface. Continue? [Y/N]:y Info: This operation may take a few seconds. Please wait. [SwitchB-stack-port0/2] quit
# Configure the service ports GigabitEthernet0/0/27 and GigabitEthernet0/0/28 on SwitchC as physical member ports and add them to the corresponding logical stack ports.
<HUAWEI> system-view [HUAWEI] sysname SwitchC [SwitchC] interface stack-port 0/1 [SwitchC-stack-port0/1] port interface gigabitethernet 0/0/27 enable Warning: Enabling stack function may cause configuration loss on the interface. Continue? [Y/N]:y Info: This operation may take a few seconds. Please wait. [SwitchC-stack-port0/1] quit [SwitchC] interface stack-port 0/2 [SwitchC-stack-port0/2] port interface gigabitethernet 0/0/28 enable Warning: Enabling stack function may cause configuration loss on the interface. Continue? [Y/N]:y Info: This operation may take a few seconds. Please wait. [SwitchC-stack-port0/2] quit
- Configure stack IDs and stack priorities.
# Set the stack priority of SwitchA to 200.
[SwitchA] stack slot 0 priority 200 Warning: Please do not frequently modify Priority because it will make the stack split. Continue? [Y/N]:y# Set the stack ID of SwitchB to 1.
[SwitchB] stack slot 0 renumber 1 Warning: All the configurations related to the slot ID will be lost after the slot ID is modified. Please do not frequently modify slot ID because it will make the stack split. Continue? [Y/N]:y Info: Stack configuration has been changed, and the device needs to restart to make the configuration effective.
# Set the stack ID of SwitchC to 2.
[SwitchC] stack slot 0 renumber 2 Warning: All the configurations related to the slot ID will be lost after the slot ID is modified. Please do not frequently modify slot ID because it will make the stack split. Continue? [Y/N]:y Info: Stack configuration has been changed, and the device needs to restart to make the configuration effective.
- Power off SwitchA, SwitchB, and SwitchC, connect them using SFP+ stack cables, and then power the switches on.
- Run the save command to save the configurations before you power off the switches.
- stack-port 0/1 of one switch must be connected to stack-port 0/2 of a neighboring switch. Otherwise, the stack cannot be set up.
- To ensure that the stack has been successfully established, connect and power on the switches in the following sequence. (To specify a member switch as the master switch, power on that switch first. In this example, SwitchA is the master switch.)
- Power off SwitchA, SwitchB, and SwitchC.
- Connect SwitchA and SwitchB with a stack cable.
- Power on and start SwitchA and then power on SwitchB.
- Check whether SwitchA and SwitchB have set up a stack successfully. For the verification method, see Checking Whether a Stack Has Been Established Through Service Port Connections.
- Connect SwitchC to SwitchB and SwitchA using stack cables and then power on SwitchC.
- Check whether SwitchA, SwitchB, and SwitchC have set up a stack successfully. For the verification method, see Checking Whether a Stack Has Been Established Through Service Port Connections.
- Configure inter-device Eth-Trunks.
Configure inter-device Eth-Trunk uplinks for the stack. For the detailed configuration process, see Example for Configuring Stack Eth-Trunks.
- Verify the configuration.
# Check basic stack information.
[SwitchA] display stack Stack mode: Service-port Stack topology type : Ring Stack system MAC: 0018-82d2-2e85 MAC switch delay time: 10 min Stack reserved vlan : 4093 Slot of the active management port: -- Slot Role Mac address Priority Device type ------------------------------------------------------------- 0 Master 0018-82d2-2e85 200 S5720-28P-LI-AC 1 Standby 0018-82c6-1f44 100 S5720-28P-LI-AC 2 Slave 0018-82c6-1f4c 100 S5720-28P-LI-AC