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Configuration Guide - Virtualization

CloudEngine 12800 and 12800E V200R002C50

This document describes the configurations of virtualization, including stack and VS.

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New Stack Member Joining and Stack Merging

New Stack Member Joining and Stack Merging

Joining of a Stack Member

A new member switch can join a running single-chassis stack (a standalone switch running the stacking function). In Figure 1-12, SwitchA is a single-chassis stack. After SwitchB joins the stack, the two switches set up a new stack. Then SwitchA becomes the master switch, and SwitchB becomes the standby switch.

Figure 1-12 New member switch joins a single-chassis stack
A new member switch joins a single-chassis stack in either of the following situations:
  • After two switches are connected using stack cables, one switch is configured with the stacking function and restarted. This switch enters the single-chassis stack state. After the other switch is configured with the stacking function and restarted, it joins the stack as the standby switch.
  • In a running two-chassis stack, one switch restarts and rejoins the stack as the standby switch.

Stack Merging

Two stacks in the running state can merge into one stack. In Figure 1-13, two single-chassis stacks merge into one and elect a master switch (following the same master election rules used in a stack). The master switch retains its original configuration, and its services are not affected. The standby switch restarts, joins the new stack as the standby switch, and synchronizes the configuration file with the master switch. Original services on this switch are interrupted.

Figure 1-13 Two stacks merge
Stack merging occurs in either of the following situations:
  • After two switches are configured with the stacking function and restarted, they run as single-chassis stacks. After they are connected using stack cables, they merge into one stack.
  • A stack splits due to a failure of a stack link or member switch. When the link or switch recovers, the two single-chassis stacks merge into one.
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Updated: 2019-03-21

Document ID: EDOC1000166610

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