帮助文档>硬件运维 > 在思科设备上配置VRRP MSTP实现网关冗余和负载分担

在思科设备上配置VRRP MSTP实现网关冗余和负载分担

发布时间:2021-09-25 01:30
 

拓扑如下图所示:

具体配置如下:

SW3:

先创建vlan10,20

vlan 10

vlan 20

然后在接口下划分trunk、access模式

interface Ethernet0/3

switchport mode access

switchport access vlan 10

interface Ethernet1/0

switchport mode access

switchport access vlan 20

int range e0/1 , e0/2

switchport trunk encapsulation dot1q

switchport mode trunk

switchport trunk allowed vlan 10,20

配置mstp

spanning-tree mode mstp

spanning-tree mst configuration

name qgtest

revision 123

instance 10 vlan 10

instance 20 vlan 20

SW1:

先创建vlan10,20

vlan 10

vlan 20

配置链路聚合和trunk口

interface range e0/2 , e0/0 , e0/1

switchport trunk encapsulation dot1q

switchport mode trunk

switchport trunk allowed vlan 10,20

interface range e0/2 , e0/0

channel-group 1 mode on

配置mstp

spanning-tree mode mstp

spanning-tree mst configuration

name qgtest

revision 123

instance 10 vlan 10

instance 20 vlan 20

spanning-tree mst 10 root primary

spanning-tree mst 20 root sec

配置vrrp

interface Vlan10

ip address 192.168.10.253 255.255.255.0

vrrp 10 ip 192.168.10.254

vrrp 10 priority 200

interface Vlan20

ip address 192.168.20.252 255.255.255.0

vrrp 20 ip 192.168.20.254

vrrp 20 priority 100

SW2:

先创建vlan10,20

vlan 10

vlan 20

配置链路聚合和trunk口

interface range e0/2 , e0/0 , e0/1

switchport trunk encapsulation dot1q

switchport mode trunk

switchport trunk allowed vlan 10,20

interface range e0/2 , e0/0

channel-group 1 mode on

配置mstp

spanning-tree mode mstp

spanning-tree mst configuration

name qgtest

revision 123

instance 10 vlan 10

instance 20 vlan 20

spanning-tree mst 20 root primary

spanning-tree mst 10 root sec

配置vrrp

interface Vlan20

ip address 192.168.20.253 255.255.255.0

vrrp 20 ip 192.168.20.254

vrrp 20 priority 200

interface Vlan10

ip address 192.168.10.252 255.255.255.0

vrrp 10 ip 192.168.10.254

vrrp 10 priority 100

备注:如果SW1有上行接口和上行链路时,其中一个发生故障,VRRP默认是无法感知的,即主备状态无法切换,数据包无法发送出去,这是就要用到track功能。具体配置如下:

SW1/SW2:

vrrp 10 track 1 decrement 150

track 1 int g0/0/3 line-protocol

假设G0/0/3为上行口,配置完这条命令之后,即当上行链路发生故障时,其优先级减少150,然后当前优先级小于Backup状态的三层交换机,则主备状态发生切换。
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