1、2,在SwitchA和SwitchB 配置VRRP备份组。其中,SwitchA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;SwitchB上配置较低优先级,作为备用交 换机,实现网关冗余备份。操作步骤1. 配置设备间的网络互连#配置设备各接口的 IP地址,以SwitchA为例。SwitchB和SwitchC的配置与 SwitchA类似,详见配置文件。 system-viewHUAWEI sysname SwitchASwitchA vlan batch 100 300SwitchA interface gigabitethernet 1/0/1SwitchA-Gig
2、abitEthernet1/0/1 port link-type hybrid SwitchA-GigabitEthernet1/0/1 port hybrid pvid vlan 300SwitchA-GigabitEthernet1/0/1 port hybrid untagged vlan 300 SwitchA-GigabitEthernet1/0/1 quit SwitchA interface gigabitethernet 1/0/2HUAWEI sysname SwitchSwitch vlan 100Switch-vlan100 quitSwitch interface gi
3、gabitethernet 1/0/1#配置SwitchA、SwitchB和SwitchC间采用 OSPF协议进行互连。以SwitchA为例,SwitchB和SwitchC的配置与SwitchA类似,详见配置文件。SwitchA ospf 1SwitchA-ospf-1 area 0network network quit SwitchA-ospf-1 quit#在SwitchA上创建VRRP备份组1,配置SwitchA在该备份组中的优先级为 120,并配置抢占时间为20秒。SwitchA interface vlanif 100SwitchA-Vlanif100 vrrp vrid 1 vi
4、rtual-ip 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SwitchA-Vlanif100 vrrp vrid 1 preempt-mode timer delay 20 设备在 VRRP备份组中缺省 采用立即抢占方式。修改 Master设备的延退抢占时间,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-Vlanif100 quit#在SwitchB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)。SwitchB inte
5、rface vlanif 100 SwitchB-Vlanif100 vrrp vrid 1 virtual-ip quit#完成上述配置以后,在 SwitchA和SwitchB上分别执行display vrrp命令,可以看到 SwitchA在备份组中的状态为 Master, SwitchB在备份组中的状态为 Backup。SwitchA display vrrpVlanif100 | Virtual Router 1State : MasterVirtual IP : Master IP : PriorityRun : 120PriorityConfig :MasterPriority :P
6、reempt : YES Delay Time : 20 sTimerRun : 1 sTimerConfig :Auth type : NONEVirtual MAC : 0000-5e00-0101Check TTL : YESConfig type : normal-vrrpBackup-forward : disabledCreate time : 2012-01-12 20:15:46Last change time :SwitchB display vrrp Backup 100 0 s# 在 SwitchA 和 SwitchB 上执行 display ip routing-tab
7、le 命令,SwitchA 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 SwitchB上该路由为 OSPF路由。SwitchA和SwitchB上的显示信息如下。SwitchA display ip routing-tableRoute Flags: R - relay, D - download to fibRouting Tables: PublicDestinations : 9Routes : 10Destination/MaskProtoPre CostFlags NextHopInterfaceDirect0 0DVlanif100Direct 0InLoopBa
8、ck0OSPF102Vlanif30010 2D Vlanif300SwitchB display ip routing-table R - relay, D-download to fibDestinations:9Flags NextHop InterfaceOSPF 10Vlanif200D Vlanif200#在SwitchA的接口 GE1/0/2上执行shutdown命令,模拟 SwitchA出现故障。SwitchA interface gigabitethernet 1/0/2SwitchA-GigabitEthernet1/0/2 shutdownSwitchA-GigabitE
9、thernet1/0/2 quit#在SwitchB上执行display vrrp命令查看 VRRP状态信息,可以看到 SwitchB的状态是Master。18:40# 在 SwitchA 的接口 GE1/0/2 上执行 undo shutdown 命令。SwitchA-GigabitEthernet1/0/2 undo shutdown#等待20秒后,在SwitchA上执行display vrrp命令查看 VRRP状态信息,可以看到 SwitchA的状态恢复成Master。20:56配置文件SwitchA的配置文件#sysname SwitchAvlan batch 100 300inter
10、face Vlanif100ip address vrrp vrid 1 virtual-ip vrrp vrid 1 priority 120vrrp vrid 1 preempt-mode timer delay 20interface Vlanif300ip address GigabitEthernet1/0/1port link-type hybridport hybrid pvid vlan 300port hybrid untagged vlan 300interface GigabitEthernet1/0/2port hybrid pvid vlan 100port hybr
11、id untagged vlan 100ospf 1area network network 的配置文件sysname SwitchBvlan batch 100 200ip address vrrp vrid 1 virtual-ip Vlanif200port hybrid pvid vlan 200port hybrid untagged vlan 200sysname SwitchCvlan batch 200 300 400interface Vlanif200ip address Vlanif300ip address Vlanif400interface GigabitEthernet1/0/3port hybrid pvid vlan 400port hybrid untagged vlan 400的配置文件area network network networksysname Switchvlan batch 100interface GigabitEthernet1/0/1# return
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