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Configuration Guide - Device Management

S1720, S2700, S5700, and S6720 V200R011C10

This document describes the principles and configurations of the Device Management features, and provides configuration examples of these features.
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Example for Adding a Member Switch to a Stack (Service Port Connection Using Dedicated Stack Cables)

Example for Adding a Member Switch to a Stack (Service Port Connection Using Dedicated Stack Cables)

Networking Requirements

In Figure 9-49, SwitchA, SwitchB, and SwitchC set up a stack using dedicated stack cables to provide access service to users. The stack connects to SwitchD through an inter-chassis Eth-Trunk. SwitchA, SwitchB, and SwitchC are the master, standby, and slave switches respectively, with stack IDs of 0, 1, and 2 respectively. As the number of users increases, the current stack cannot provide sufficient ports for user access.

SwitchE needs to be added to the stack to increase the number of ports. Figure 9-50 shows the topology of the new stack.

Figure 9-49  Before the new member switch is added to the stack
Figure 9-50  After the new member switch is added to the stack

Configuration Roadmap

The configuration roadmap is as follows:
  1. Analyze physical connections between original stack member switches to determine where to add the new member switch.

  2. Power off SwitchE. Connect stack member ports using dedicated stack cables according to Figure 9-51 and then power on the switches.


    Connect port STACK 1 of one switch to port STACK 2 of another switch.

  3. Add the uplink port of SwitchE to the inter-chassis Eth-Trunk.


  1. Determine the location for the new member switch.

    # The stack in this example has a ring topology. To add the new member switch to the stack, tear down the link between SwitchA and SwitchC to change the stack topology to a chain topology, and then connect SwitchE to SwitchA and SwitchC.

  2. Power off SwitchE, use dedicated stack cables to connect GE0/0/27 and GE0/0/26 on SwitchE to corresponding ports on SwitchA and SwitchC according to Figure 9-51, and then power on SwitchE.

    Figure 9-51  Dedicated stack cable connection

  3. Add the uplink port of SwitchE to the inter-chassis Eth-Trunk.

    For details about the configuration, see Example for Configuring Stack Eth-Trunks.

  4. Check basic stack information.

    The command output shows that SwitchA, SwitchB, and SwitchC retain their roles and SwitchE becomes a slave switch and is automatically assigned a stack ID 3.

    [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   100        S5720-28P-LI-AC
        1     Standby     0018-82c6-1f44   100        S5720-28P-LI-AC
        2     Slave       0018-82c6-1f4c   100        S5720-28P-LI-AC
        3     Slave       0018-82c6-1f4a   100        S5720-28P-LI-AC

Configuration Files


Updated: 2019-10-21

Document ID: EDOC1000178167

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