拓扑图：
配置代码：
sw1------------
sys
vlan 10
vlan 20
quit
int e0/0/1
port link-type access
port default vlan 10
int e0/0/2
port link-type access
port default vlan 20
int e0/0/3
port link-type trunk
port trunk allow-pass vlan all
int e0/0/4
port link-type trunk
port trunk allow-pass vlan all
quit
(每个交换机都配)
stp region-configuration
region-name fxl
revision-level 1
instance 1 vlan 10
instance 2 vlan 20
active region-configuration
quit
sw2--------------
sys
vlan 10
vlan 20
quit
int e0/0/1
port link-type access
port default vlan 10
int e0/0/2
port link-type access
port default vlan 20
int e0/0/3
port link-type trunk
port trunk allow-pass vlan all
int e0/0/4
port link-type trunk
port trunk allow-pass vlan all
quit
stp region-configuration
region-name fxl
revision-level 1
instance 1 vlan 10
instance 2 vlan 20
active region-configuration
quit
sw3--------------
sys
vlan 10
vlan 20
quit
（g0/0/3和g0/0/4端口聚合）
interface eth-trunk 1
quit
interface g0/0/3
eth-trunk 1
quit
interface g0/0/4
eth-trunk 1
quit
interface eth-trunk 1
port link-type trunk
port trunk allow-pass vlan all
quit
int g0/0/1
port link-type trunk
port trunk allow-pass vlan all
int g0/0/2
port link-type trunk
port trunk allow-pass vlan all
quit
stp region-configuration
region-name fxl
revision-level 1
instance 1 vlan 10
instance 2 vlan 20
active region-configuration
quit
stp instance 1 priority 4096(配置stp使sw3成为vlan10的根)
(配置g0/0/5ip)
vlan 100
int vlanif 100
ip add 10.0.0.1 24
int g0/0/5
port link-type access
port default vlan 100
quit
(配置vrrp 使sw4down掉时数据可从sw3通过)
int vlanif 10（与sw4中的vlan10对比）
ip add 192.168.10.252 24
vrrp vrid 1 virtual-ip 192.168.10.254（sw3和sw4都配这虚拟ip）
vrrp vrid 1 priority 200（数据从优先级大的通过）
vrrp vrid 1 track interface g0/0/5 reduced 150
（配置端口追踪，当g0/0/5down掉时将vrid 优先级减150）
quit
int vlanif 20（与sw4中的vlan20对比）
ip add 192.168.20.252 24
vrrp vrid 2 virtual-ip 192.168.20.254
vrrp vrid 2 priority 150
quit
rip
version 2
network 192.168.10.0
network 192.168.20.0
network 10.0.0.0
quit
sw4--------------
sys
vlan 10
vlan 20
quit
（g0/0/3和g0/0/4端口聚合）
interface eth-trunk 1
quit
interface g0/0/3
eth-trunk 1
quit
interface g0/0/4
eth-trunk 1
quit
interface eth-trunk 1
port link-type trunk
port trunk allow-pass vlan all
quit
int g0/0/1
port link-type trunk
port trunk allow-pass vlan all
int g0/0/2
port link-type trunk
port trunk allow-pass vlan all
quit
(配置stp使sw4成为vlan20的根)
stp region-configuration
region-name fxl
revision-level 1
instance 1 vlan 10
instance 2 vlan 20
active region-configuration
quit
stp instance 2 priority 4096
(配置g0/0/5ip)
vlan 200
int vlanif 200
ip add 20.0.0.1 24
int g0/0/5
port link-type access
port default vlan 200
quit
int vlanif 10
ip add 192.168.10.253 24
vrrp vrid 1 virtual-ip 192.168.10.254
vrrp vrid 1 priority 150
quit
(配置vrrp 使sw4down掉时数据可从sw3通过)
int vlanif 20
ip add 192.168.20.253 24
vrrp vrid 2 virtual-ip 192.168.20.254
vrrp vrid 2 priority 200
vrrp vrid 2 track interface g0/0/5 reduced 150
quit
rip
version 2
network 192.168.10.0
network 192.168.20.0
network 20.0.0.0
quit
R1---------
sys
int g0/0/0
ip add 10.0.0.2 24
int g0/0/1
ip add 20.0.0.2 24
int g0/0/2
ip add 30.0.0.254 24
quit
rip
version 2
network 10.0.0.0
network 20.0.0.0
network 30.0.0.0
quit
验证：
vlan10从sw3通过
Vlan20从sw4通过
把sw4down掉后：vlan20数据从sw3通过：
验证端口追踪：
把sw4端口g0/0/5down掉后：vlan20数据从sw3通过：
本文转自 fxl风 51CTO博客，原文链接:http://blog.51cto.com/fengxiaoli/1946545
