一、组网需求:
HostA和HostC通过Switch双归属到SwitchA和SwitchB。为减轻SwitchA上数据流量的承载压力,HostA以SwitchA为默认网关接入Internet,SwitchB作为备份网关;HostC以SwitchB为默认网关接入Internet,SwitchA作为备份网关,以实现流量的负载均衡。
要确保该场景下互联接口的STP处于未使能状态。同时将互连接口退出VLAN1,避免形成环路。因为在使能STP的环形网络中,如果用交换机的VLANIF接口构建三层网络,会导致某个端口被阻塞,从而导致三层业务不能正常运行。
?二、配置思路:
采用VRRP负载分担实现流量的负载均衡,配置思路如下:?
三、实验:
3.1实验拓扑:
3.2实验步骤:
# 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。
<HUAWEI> system-view
[HUAWEI] sysname SwitchA
[SwitchA] vlan batch 100 300
[SwitchA] interface gigabitethernet 0/0/1
[SwitchA-GigabitEthernet0/0/1] port link-type hybrid
[SwitchA-GigabitEthernet0/0/1] port hybrid pvid vlan 300
[SwitchA-GigabitEthernet0/0/1] port hybrid untagged vlan 300
[SwitchA-GigabitEthernet0/0/1] quit
[SwitchA] interface gigabitethernet 0/0/2
[SwitchA-GigabitEthernet0/0/2] port link-type hybrid
[SwitchA-GigabitEthernet0/0/2] port hybrid pvid vlan 100
[SwitchA-GigabitEthernet0/0/2] port hybrid untagged vlan 100
[SwitchA-GigabitEthernet0/0/2] quit
[SwitchA] interface vlanif 100
[SwitchA-Vlanif100] ip address 10.1.1.1 24
[SwitchA-Vlanif100] quit
[SwitchA] interface vlanif 300
[SwitchA-Vlanif300] ip address 192.168.1.1 24
[SwitchA-Vlanif300] quit
# 配置Switch的二层转发功能。
<HUAWEI> system-view
[HUAWEI] sysname Switch
[Switch] vlan 100
[Switch-vlan100] quit
[Switch] interface gigabitethernet 0/0/1
[Switch-GigabitEthernet0/0/1] port link-type hybrid
[Switch-GigabitEthernet0/0/1] port hybrid pvid vlan 100
[Switch-GigabitEthernet0/0/1] port hybrid untagged vlan 100
[Switch-GigabitEthernet0/0/1] quit
[Switch] interface gigabitethernet 0/0/2
[Switch-GigabitEthernet0/0/2] port link-type hybrid
[Switch-GigabitEthernet0/0/2] port hybrid pvid vlan 100
[Switch-GigabitEthernet0/0/2] port hybrid untagged vlan 100
[Switch-GigabitEthernet0/0/2] quit
# 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 1
[SwitchA-ospf-1] area 0
[SwitchA-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255
[SwitchA-ospf-1-area-0.0.0.0] network 192.168.1.0 0.0.0.255
[SwitchA-ospf-1-area-0.0.0.0] quit
[SwitchA-ospf-1] quit
# 在SwitchA和SwitchB上创建VRRP备份组1,配置SwitchA的优先级为120,抢占延时为20秒,作为Master设备;SwitchB的优先级为缺省值,作为Backup设备。
[SwitchA] interface vlanif 100
[SwitchA-Vlanif100] vrrp vrid 1 virtual-ip 10.1.1.111
[SwitchA-Vlanif100] vrrp vrid 1 priority 120
[SwitchA-Vlanif100] vrrp vrid 1 preempt-mode timer delay 20
[SwitchA-Vlanif100] quit
[SwitchB] interface vlanif 100
[SwitchB-Vlanif100] vrrp vrid 1 virtual-ip 10.1.1.111
[SwitchB-Vlanif100] quit
# 在SwitchA和SwitchB上创建VRRP备份组2,配置SwitchB的优先级为120,抢占延时为20秒,作为Master设备;SwitchA的优先级为缺省值,作为Backup设备。
[SwitchB] interface vlanif 100
[SwitchB-Vlanif100] vrrp vrid 2 virtual-ip 10.1.1.112
[SwitchB-Vlanif100] vrrp vrid 2 priority 120
[SwitchB-Vlanif100] vrrp vrid 2 preempt-mode timer delay 20
[SwitchB-Vlanif100] quit
[SwitchA] interface vlanif 100
[SwitchA-Vlanif100] vrrp vrid 2 virtual-ip 10.1.1.112
[SwitchA-Vlanif100] quit
3.实验结果:?