一、配置思路： 1、 采用VRRP主备备份实现网关冗余备份。 2、 配置各设备接口IP地址及路由协议，使各设备间网络层连通。 3、 在主核心和备用核心上配置VRRP备份组。其中，主核心上配置较高优先级和20秒抢占延时，作为Master设备承担流量转发；备用核心上配置较低优先级，作为备用交换机，实现网关冗余备份。 二、配置步骤 1、配置设备间的网络互连： 服务器交换机配置 <HUAWEI> system-view [HUAWEI] sysname FuQiSW [FuQiSW] vlan batch 100 200 300 400 [FuQiSW] interface gigabitethernet 1/0/1 [FuQiSW-GigabitEthernet1/0/1] port link-type access [FuQiSW-GigabitEthernet1/0/1] port default vlan 100 [FuQiSW] interface gigabitethernet 1/0/2 [FuQiSW-GigabitEthernet1/0/4] port link-type access [FuQiSW-GigabitEthernet1/0/4] port default vlan 100 [FuQiSW-GigabitEthernet1/0/5] port link-type access [FuQiSW-GigabitEthernet1/0/5] port default vlan 100 [FuQiSW-GigabitEthernet1/0/2] port link-type truk [FuQiSW-GigabitEthernet1/0/2] port trunk allow-pass vlan all [FuQiSW-GigabitEthernet1/0/3] port link-type truk [FuQiSW-GigabitEthernet1/0/3] port trunk allow-pass vlan all [FuQiSW] interface vlanif 100 [FuQiSW-Vlanif100] ip address 192.168.1.1 24 [FuQiSW-Vlanif100] quit [FuQiSW] interface vlanif 200 [FuQiSW-Vlanif200] ip address 192.168.2.1 24 [FuQiSW-Vlanif200] quit FuQiSW] interface vlanif 300 [FuQiSW-Vlanif300] ip address 192.168.3.1 24 [FuQiSW-Vlanif300] quit 2、主核心交换机配置： <HUAWEI> system-view [HUAWEI] sysname Master [Master] vlan batch 100 200 300 400  [Master] interface gigabitethernet 1/0/1 [Master-GigabitEthernet1/0/1] port link-type truk  [Master-GigabitEthernet1/0/1] port trunk allow-pass vlan all  [Master-GigabitEthernet1/0/1] quit [Master] interface gigabitethernet 1/0/2 Master-GigabitEthernet1/0/2] port link-type truk  [Master-GigabitEthernet1/0/2] port trunk allow-pass vlan all  [Master-GigabitEthernet1/0/2] quit [Master] interface vlanif 200 [Master-Vlanif200] ip address 192.168.2.2 24 [Master-Vlanif200] quit [Master] interface vlanif 400 [Master-Vlanif400] ip address 192.168.200.1 24 [Master-Vlanif400] quit 3、备核心交换机配置： <HUAWEI> system-view [HUAWEI] sysname BackSW [BackSW] vlan batch 100 200 300 400  [BackSW] interface gigabitethernet 1/0/1 [BackSW-GigabitEthernet1/0/1] port link-type truk  [BackSW-GigabitEthernet1/0/1] port trunk allow-pass vlan all  [BackSW-GigabitEthernet1/0/1] quit [BackSW] interface gigabitethernet 1/0/2 BackSW-GigabitEthernet1/0/2] port link-type truk  [BackSW-GigabitEthernet1/0/2] port trunk allow-pass vlan all  [BackSW-GigabitEthernet1/0/2] quit [BackSW] interface vlanif 300 [BackSW-Vlanif300] ip address 192.168.3.2 24 [BackSW-Vlanif300] quit [BackSW] interface vlanif 400 [BackSW-Vlanif400] ip address 192.168.200.2 24 [BackSW-Vlanif400] quit 4、会聚交换机配置： [HUAWEI] sysname HuiJiSW [HuiJiSW] vlan batch 100 200 300 400  [HuiJiSW] interface gigabitethernet 1/0/1 [HuiJiSW-GigabitEthernet1/0/1] port link-type truk  [HuiJiSW-GigabitEthernet1/0/1] port trunk allow-pass vlan all  [HuiJiSW-GigabitEthernet1/0/1] quit [HuiJiSW] interface gigabitethernet 1/0/2 HuiJiSW-GigabitEthernet1/0/2] port link-type truk  [HuiJiSW-GigabitEthernet1/0/2] port trunk allow-pass vlan all  [HuiJiSW-GigabitEthernet1/0/2] quit [HuiJiSW -GigabitEthernet1/0/4] port link-type access [HuiJiSW -GigabitEthernet1/0/4] port default vlan 400 [HuiJiSW -GigabitEthernet1/0/4] quit [HuiJiSW -GigabitEthernet1/0/5] port link-type access [HuiJiSW -GigabitEthernet1/0/5] port default vlan 400 [HuiJiSW -GigabitEthernet1/0/5] quit 三、配置服务器交换机、主核心交换机和备核心交换机间采用OSPF协议进行互连。 以主核心交换机为例，服务器交换机和备核心交换机的配置与主核心交换机类似。 [Master] ospf 1 [Master -ospf-1] area 0 [Master -ospf-1-area-0.0.0.0] network 192.168.2.0 0.0.0.255 [Master -ospf-1-area-0.0.0.0] network 192.168.200.0 0.0.0.255 [Master -ospf-1-area-0.0.0.0] quit [Master -ospf-1] quit 四、配置VRRP备份组  1、在主核心交换机上创建VRRP备份组1，配置在该备份组中的优先级为120，并配置抢占时间为5秒。 [Master] interface vlanif 400 [Master –Vlanif400] vrrp vrid 1 virtual-ip 192.168.200.10 [Master –Vlanif400] vrrp vrid 1 priority 120                  //设备在VRRP备份组中的优先级缺省为100，修改Master设备的优先级大于Backup设备 [Master –Vlanif400] vrrp vrid 1 preempt-mode timer delay 5   //修改Master设备的延迟抢占时间，以避免在网络环境不稳定时，由于双方频繁抢占而导致流量中断的问题 [SwitchA-Vlanif400] quit 2、在备核心交换机上创建VRRP备份组1，其在该备份组中的优先级采用缺省值100（不需要配置）。 [BackSW] interface vlanif 400 [BackSW] –Vlanif400] vrrp vrid 1 virtual-ip 192.168.200.10 [BackSW]–Vlanif400] quit 五、验证配置结果 1、完成上述配置以后，在主核心交换机和备核心交换机上分别执行display vrrp命令，可以看到主核心交换机在备份组中的状态为Master，备核心换机在备份组中的状态为Backup。 2、在主核心上和备核心上执行display ip routing-table命令，主核心交换机上可以看到路由表中有一条目的地址为虚拟IP地址的直连路由，而备核心交换机上该路由为OSPF路由。 3、模拟主核心交换机出现故障。不会掉线，配置完成。