什么是核心交换机的链路聚合、冗余、堆叠、热备份_核心交换机堆叠的作用

下面我将分享一些什么是核心交换机的链路聚合、冗余、堆叠、热备份_核心交换机堆叠的作用，帮助大家更好地了解什么是核心交换机的链路聚合、冗余、堆叠、热备份_核心交换机堆叠的作用，帮助你们，是我们网站前进的动力。

什么是核心交换机的链路聚合、冗余、堆叠、热备份

portant; overflow-wrap: break-word !important;">我portant; overflow-wrap: break-word !important;">们前面曾多次提到对于核心交换机的选择，大家可能对于核心交换机的背板带宽、包转发率都已经有所了解，然而核心交换机主要选择并不止这些参数，还需要看链路聚合、冗余、堆叠、热备份等这些功能，这些功能非常重要，决定了核心交换机在实际应用中的性能、效率、稳定性等，我们一起来了解下。

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; text-align: center; letter-spacing: 2px; font-size: 15px; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;">一、链路聚合<strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;">

<p style="margin-top: 16px; margin-bottom: 16px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; letter-spacing: 0.544px; white-space: normal; -webkit-tap-highlight-color: transparent; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">是将两个或更多数据信道结合成一个单个的信道，该信道以一个单个的更高带宽的逻辑链路出现。链路聚合一般用来连接一个或多个带宽需求大的设备，例如连接骨干网络的服务器或服务器群。portant; overflow-wrap: break-word !important;">它可以用于扩展链路带宽，提供更高的连接可靠性portant; overflow-wrap: break-word !important;">。

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">1、举例portant; overflow-wrap: break-word !important;">

portant; overflow-wrap: break-word !important;">公司有2层楼，分别运行着不同的业务，本来两个楼层的网络是分开的，但都是一家公司难免会有业务往来，这时我们就可以打通两楼之前的网络，使具有相互联系的部门之间高速通信。

portant; overflow-wrap: break-word !important;">如下图：

<p style="margin-top: 14px; margin-bottom: 14px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; letter-spacing: 0.544px; white-space: normal; font-size: 14px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei", Arial; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">如上图所示，SwitchA和SwitchB通过以太链路分别都连接VLAN10和VLAN20的网络，且SwitchA和SwitchB之间有较大的数据流量。

portant; overflow-wrap: break-word !important;">用户希望SwitchA和SwitchB之间能够提供较大的链路带宽来使相同VLAN间互相通信。portant; overflow-wrap: break-word !important;">同时用户也希望能够提供一定的冗余度，保证数据传输和链路的可靠性。

<p style="margin-top: 14px; margin-bottom: 14px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; letter-spacing: 0.544px; white-space: normal; font-size: 14px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei", Arial; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">创建Eth-Trunk接口并加入成员接口，实现增加链路带宽，2台交换机分别配置Eth-Trunk1 分别将需要通信的3条线路的端口加入Eth-Trunk1，设置端口portant; overflow-wrap: break-word !important;">trunk， 允许相应的vlan通过；portant; overflow-wrap: break-word !important;">这样两楼的网络就可以正常通信了。

<p style="margin-top: 14px; margin-bottom: 14px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; letter-spacing: 0.544px; white-space: normal; font-size: 14px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei", Arial; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">

<p style="margin-top: 14px; margin-bottom: 14px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; letter-spacing: 0.544px; white-space: normal; font-size: 14px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei", Arial; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; color: rgb(217, 33, 66);"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">2、实现配置步骤：<strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">

<p style="margin-top: 14px; margin-bottom: 14px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; letter-spacing: 0.544px; white-space: normal; font-size: 14px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei", Arial; overflow-wrap: break-word !important;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">在SwitchA上创建Eth-Trunk1并配置为LACP模式。portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">SwitchB配置过程与SwitchA类似，不再赘述portant; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;"><HUAWEI> system-view
portant; overflow-wrap: break-word !important;">[HUAWEI] sysname SwitchA
portant; overflow-wrap: break-word !important;">[SwitchA] interface eth-trunk 1
portant; overflow-wrap: break-word !important;">[SwitchA-Eth-Trunk1] mode lacp
portant; overflow-wrap: break-word !important;">[SwitchA-Eth-Trunk1] quit

<strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">配置SwitchA上的成员接口加入Eth-Trunk。portant; overflow-wrap: break-word !important;">SwitchB配置过程与SwitchA类似，不再赘述

portant; overflow-wrap: break-word !important;">[SwitchA] interface gigabitethernet 0/0/1
portant; overflow-wrap: break-word !important;">[SwitchA-GigabitEthernet0/0/1] eth-trunk 1
portant; overflow-wrap: break-word !important;">[SwitchA-GigabitEthernet0/0/1] quit
portant; overflow-wrap: break-word !important;">[SwitchA] interface gigabitethernet 0/0/2
portant; overflow-wrap: break-word !important;">[SwitchA-GigabitEthernet0/0/2] eth-trunk 1
portant; overflow-wrap: break-word !important;">[SwitchA-GigabitEthernet0/0/2] quit
portant; overflow-wrap: break-word !important;">[SwitchA] interface gigabitethernet 0/0/3
portant; overflow-wrap: break-word !important;">[SwitchA-GigabitEthernet0/0/3] eth-trunk 1
portant; overflow-wrap: break-word !important;">[SwitchA-GigabitEthernet0/0/3] quit

<strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">在SwitchA上配置系统优先级为100，使其成为LACP主动端
portant; overflow-wrap: break-word !important;">[SwitchA] lacp priority 100

<strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">在SwitchA上配置活动接口上限阈值为2
portant; overflow-wrap: break-word !important;">[SwitchA] interface eth-trunk 1
portant; overflow-wrap: break-word !important;">[SwitchA-Eth-Trunk1] max active-linknumber 2
portant; overflow-wrap: break-word !important;">[SwitchA-Eth-Trunk1] quit

<strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">在SwitchA上配置接口优先级确定活动链路portant; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">[SwitchA] interface gigabitethernet 0/0/1
portant; overflow-wrap: break-word !important;">[SwitchA-GigabitEthernet0/0/1] lacp priority 100
portant; overflow-wrap: break-word !important;">[SwitchA-GigabitEthernet0/0/1] quit
portant; overflow-wrap: break-word !important;">[SwitchA] interface gigabitethernet 0/0/2
portant; overflow-wrap: break-word !important;">[SwitchA-GigabitEthernet0/0/2] lacp priority 100
portant; overflow-wrap: break-word !important;">[SwitchA-GigabitEthernet0/0/2] quit

<p style="margin-top: 14px; margin-bottom: 14px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; letter-spacing: 0.544px; white-space: normal; font-size: 14px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei", Arial; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; text-align: center; letter-spacing: 2px; font-size: 15px; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;">二、链路冗余<strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;">

<p style="margin-top: 16px; margin-bottom: 16px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; letter-spacing: 0.544px; white-space: normal; -webkit-tap-highlight-color: transparent; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">为了保持portant; overflow-wrap: break-word !important;">网络portant; overflow-wrap: break-word !important;">的稳定性，在多台portant; overflow-wrap: break-word !important;">交换机portant; overflow-wrap: break-word !important;">组成的网络环境中，通常都使用一些备份连接，以提高网络的效率、稳定性，这里的备份连接也称为备份链路或者冗余链路。portant; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; text-align: center; letter-spacing: 2px; font-size: 15px; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;">三、交换机的堆叠<strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;">

portant; overflow-wrap: break-word !important;">通过专有的堆叠电缆连接起来，可将多台交换机堆叠成一台逻辑交换机。portant; overflow-wrap: break-word !important;">该逻辑交换portant; overflow-wrap: break-word !important;">机portant; overflow-wrap: break-word !important;">中的所有交换机共享相同的配置信息和路由信息。portant; overflow-wrap: break-word !important;">当向逻辑交换机增加和减少单体交换机时不会影响其性能。

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;"> 叠加的交换机之间通过两条环路连接起来。portant; overflow-wrap: break-word !important;">交换机的硬件负责将数据包在双环路上做负载均衡。portant; overflow-wrap: break-word !important;">环路在这里充当了这个大的逻辑交换机的背板的角色，在双环路都正常工作时，数据包在这台逻辑交换机上的传输率为32Gbps。

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;"> 当一个数据帧需要传输时，交换机的软件会进行计算看哪条环路更可用，然后数据帧会被送到该环路上。portant; overflow-wrap: break-word !important;">如果一条堆叠电缆出故障，故障两端的交换机都会侦测到该故 障，并将受影响的环路断开，而逻辑交换机仍然可以以单环的状态工作，此时的数据包通过率为16Gbps。portant; overflow-wrap: break-word !important;">交换机的堆叠采用菊花链方式，连接的方式参考下图。portant; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">堆叠增加交换机端口与带宽的稳定性。

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; box-sizing: border-box; clear: both; min-height: 1em; text-align: center; letter-spacing: 2px; font-size: 15px; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;">四、热备份（HSRP)

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">

portant; overflow-wrap: break-word !important;">核心交换机是整个网络的核心和心脏，如果核心交换机发生致命性的故障，将导致本地网络的瘫痪，所造成的损失也是难以估计的。portant; overflow-wrap: break-word !important;">所以我们在选择核心交换机时，经常会看到有的核心交换机具有堆叠或热备份等功能。

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">对核心交换机采用热备份是提高网络可靠性的必然选择。portant; overflow-wrap: break-word !important;">在一个核心交换机完全不能工作的情况下，它的全部功能便被系统中的另一个备份路由器完全接管，直至出现问题的路由器恢复正常，这就是热备份路由协议.

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;"> 实现HSRP的条件是系统中有多台核心交换机，它们组成一个“热备份组”，这个组形成一个虚拟路由器。portant; overflow-wrap: break-word !important;">在任意时刻，一个组内只有一个路由器是活动的，并由它来转发数据包，如果活动路由器发生了故障，将选择一个备份路由器来替代活动路由器，但是在本网络内的主机看来，虚拟路由器没有改变。portant; overflow-wrap: break-word !important;">所以主机仍然保持连接，没有受到故障的影响，这样就较好地解决了核心交换机切换的问题。

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;"> 为了减少网络的数据流量，在设置完活动核心交换机和备份核心交换机之后，只有活动核心交换机和备份核心交换机定时发送HSRP报文。portant; overflow-wrap: break-word !important;">如果活动核心交换机失效，备份核心交换机将接管成为活动核心交换机。portant; overflow-wrap: break-word !important;">如果备份核心交换机失效或者变成了活跃核心交换机，将由另外的核心交换机被选为备份核心交换机。

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;"><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">1、当某台接入层交换机到主核心交换机的线路出现故障，切换至备机，数据流走向portant; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;"> 当接入层交换机1上联至核心交换机A的数据链路出现故障，导致接入层交换机1的数据链路切换至核心交换机B，但在切换期间接入层交换机1分丢6个数据包，如上图所示。

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;"> portant; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">当服务器与核心交换机A之间主链路出现故障（如线路、网卡等），服务器主网卡切换至备用网卡上时，会丢6个数据包，但当主链路恢复以后，服务器会自动从备用网卡切换至主网卡，而这次切换时数据包不会丢失。portant; overflow-wrap: break-word !important;">具体终端访问服务器的数据流走向如下图。

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">

<p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">

以上就是什么是核心交换机的链路聚合、冗余、堆叠、热备份的相关内容分享，字数约34440字，希望这对大家有所帮助！安防网往后会继续推荐什么是核心交换机的链路聚合、冗余、堆叠、热备份相关内容。