1. Power off SwitchA, SwitchB, SwitchC, and SwitchD. 
2. Connect SwitchA and SwitchB using a stack cable. 
3. Power on SwitchA first. After SwitchA starts, power on SwitchB. Then run a display 
command to check whether SwitchA and SwitchB set up a stack. 
4. Connect SwitchC and SwitchB using a stack cable and power on SwitchC first. Connect 
SwitchD to SwitchC and SwitchA using stack cables and then power on SwitchD. 
Step 4  Verify the configuration.   
# Check basic stack information. 
<SwitchA> display stack 
Stack topology type : Ring 
Stack system MAC: 0018-82d2-2e85 
MAC switch delay time: 10 min 
Stack reserve vlan : 4093 
Slot of the active management port: --  
slot     Role        Mac address      Priority   Device type 
------------------------------------------------------------- 
 0     Master      0018-82d2-2e85   200        S5700-28P-LI-AC 
 1     Slave       0018-82c6-1f44   100        S5700-28P-LI-AC 
 2     Standby     0018-82c6-1f4c   100        S5700-28P-LI-AC 
 3     Slave       0018-82b1-6eb8   100        S5700-28P-LI-AC 
----End 
4.2 Configuring a Stack for Bandwidth Expansion 
Networking Requirements 
As the network scale increases, switches on the network cannot provide sufficient uplink 
bandwidth. You can add new switches to configure them to set up a stack with existing 
switches and configure multiple physical links of member switches in the stack as a link 
aggregation group to increase the uplink bandwidth of the switches.   
As shown in Figure 4-2, SwitchA and SwitchB are two S6700-E1s and need to set up a stack 
with a ring topology. Assume that SwitchA functions as the master switch and SwitchB 
functions as the standby switch. To facilitate device management, set the stack ID of SwitchA 
to 0 and the stack ID of SwitchB to 1. Connect XGigabitEthernet 0/0/5 and XGigabitEthernet 
1/0/5 to access switches, and add XGigabitEthernet 0/0/20, XGigabitEthernet 0/0/21, 
XGigabitEthernet 1/0/20, and XGigabitEthernet 1/0/21 to an Eth-Trunk to increase uplink 
bandwidth.