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CloudEngine 8800, 7800, 6800, and 5800 V200R002C50 Configuration Guide - Virtualization

This document describes the configurations of virtualization, including stack and SVF.
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Basic Concepts of Stack

Basic Concepts of Stack

Figure 1-4 shows the roles and concepts in a stack.
Figure 1-4 Roles and concepts in a stack
  • Roles

    Switches that have joined a stack are member switches. Each member switch plays one of the following roles:
    • Master switch

      The master switch manages the entire stack. A stack has only one master switch.

    • Standby switch

      The standby switch is a backup of the master switch. If the master switch fails, the standby switch takes over all services from the master switch. A stack has only one standby switch.

    • Slave switch

      A slave switch forwards service traffic. The more slave switches in a stack, the higher forwarding performance the stack can provide. Apart from the master and standby switches, all the other switches in a stack are slave switches.

  • Stack domain

    After switches are connected using stack links and set up a stack, they form a stack domain. Multiple stacks can be deployed on a network to support various applications. These stacks are identified by their domain IDs.

  • Stack member ID

    Stack member IDs are used to identify and manage member switches in a stack. Each member switch in a stack has a unique member ID.

  • Stack priority

    The stack priority of a member switch determines the role of the member switch in role election. A larger value indicates a higher priority and higher probability that the member switch is elected as the master switch.

  • Stack member port

    After the mode of a physical port is set to stack, the port becomes a stack member port. Stack member ports are used to connect stack member switches.

  • Stack port

    A stack port is a logical port exclusively used for stacking and includes several stack member ports. Multiple stack member ports can be added to a stack port to improve stack link bandwidth and reliability.

    Each switch supports two stack ports, named Stack-Portn/1 and Stack-Portn/2, where n is the stack member ID of the switch.

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Updated: 2019-04-20

Document ID: EDOC1000166645

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