拓扑图实验需求：公司人数较多且多网络冗余和可用性要求较高，故网络中使用MSTP对不同的VLAN负载均衡，使用VRRP对网关进行负载均衡和平均流量，使用两家运营商线路对出口进行负载均衡。接入端配置边缘端
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拓扑图
实验需求：
公司人数较多且多网络冗余和可用性要求较高，故网络中使用MSTP对不同的VLAN负载均衡，使用VRRP对网关进行负载均衡和平均流量，使用两家运营商线路对出口进行负载均衡。接入端配置边缘端口使终端快速进入转发，配置bpdu防护，保护边缘端口接收到bpdu报文后立即关闭，减少网络的震荡。两台core之间使用eth-trunk，
配置步骤：
1.access和core交换机之间的上下联启trunk并分别都创建vlan10,20,30,40，全部启用mstp和创建instance1和instance2；
2.access交换机将端口划入对应vlan并配置边缘端口和启用bpdu防护；
3.core交换机之间配置链路聚合eth-trunk10；
4.core1和core2和出口路由器AR1和AR2配置互连地址并启用ospf；
5.core1和core2配置vrrp
6.AR1和AR2启用nat，配置默认路由出口，并将默认路由引入ospf进程中，让所有内网能访问外网；
配置命令
1 所有交换机配置mstp，trunk这里没赘述了。
vlan batch 10 20 30 40stp mode mstpstp region-configuration region-name qindu instance 1 vlan 10 20 instance 2 vlan 30 40 active region-configurationcore1是instance1的根桥是instance2的备份根桥，core2是instrance2的根桥是instance1的备份根桥。
core1
stp instance 1 priority 4096stp instance 2 priority 8192core2
stp instance 1 priority 8192stp instance 2 priority 40962.access交换机将端口划入对应vlan并配置边缘端口和启用bpdu防护；
命令如下，对应的端口配置即可。
stp bpdu-protection //全局开启bopdu防护port link-type access port default vlan 10 //划入vlan stp edged-port enable //边缘端口，实现快速收敛3.core交换机之间配置链路聚合eth-trunk10；
interface Eth-Trunk10 port link-type trunk port trunk allow-pass vlan 2 to 4094 mode lacp-static trunkport g0/0/4 trunkport g0/0/5 trunkport g0/0/64.core1和core2和出口路由器AR1和AR2配置互连地址并启用ospf；
core-1
vlan batch 911 912interface Vlanif911 ip address 10.10.253.1 255.255.255.252interface Vlanif912 ip address 10.10.253.5 255.255.255.252 ospf cost 2interface GigabitEthernet0/0/7 port link-type access port default vlan 911 interface GigabitEthernet0/0/8 port link-type access port default vlan 912core-2
vlan batch 921 922interface Vlanif921 ip address 10.10.254.1 255.255.255.252interface Vlanif912 ip address 10.10.254.5 255.255.255.252 ospf cost 2interface GigabitEthernet0/0/7 port link-type access port default vlan 921 interface GigabitEthernet0/0/8 port link-type access port default vlan 9224.core1和core2和出口路由器AR1和AR2配置互连地址并启用ospf；
core1
ospf 1 router-id 10.0.0.3 area 0.0.0.0 network 10.10.10.0 0.0.0.255 network 10.10.20.0 0.0.0.255 network 10.10.30.0 0.0.0.255 network 10.10.40.0 0.0.0.255 network 10.10.253.4 0.0.0.3 network 10.10.253.0 0.0.0.3 network 10.0.0.3 0.0.0.0core2
ospf 1 router-id 10.0.0.4 area 0.0.0.0 network 10.10.10.0 0.0.0.255 network 10.10.20.0 0.0.0.255 network 10.10.30.0 0.0.0.255 network 10.10.40.0 0.0.0.255 network 10.10.254.0 0.0.0.3 network 10.10.254.4 0.0.0.3 network 10.0.0.4 0.0.0.0AR1
ospf 1 router-id 10.0.0.1 default-route-advertise area 0.0.0.0 network 10.0.0.1 0.0.0.0 network 10.10.253.0 0.0.0.3 network 10.10.254.4 0.0.0.3AR2
ospf 1 router-id 10.0.0.2 default-route-advertise area 0.0.0.0 network 10.0.0.2 0.0.0.0 network 10.10.253.4 0.0.0.3 network 10.10.254.0 0.0.0.3 5.core1和core2配置vrrp
core1
interface Vlanif10 ip address 10.10.10.252 255.255.255.0 vrrp vrid 10 virtual-ip 10.10.10.254 vrrp vrid 10 priority 120 vrrp vrid 10 track interface GigabitEthernet0/0/7 reduced 21 ospf cost 2 dhcp select relay dhcp relay server-ip 10.10.253.2#interface Vlanif20 ip address 10.10.20.252 255.255.255.0 vrrp vrid 20 virtual-ip 10.10.20.254 vrrp vrid 20 priority 120 vrrp vrid 20 track interface GigabitEthernet0/0/7 reduced 21 ospf cost 2 dhcp select relay dhcp relay server-ip 10.10.253.2#interface Vlanif30 ip address 10.10.30.252 255.255.255.0 vrrp vrid 30 virtual-ip 10.10.30.254 ospf cost 2#interface Vlanif40 ip address 10.10.40.252 255.255.255.0 vrrp vrid 40 virtual-ip 10.10.40.254 ospf cost 2core2
interface Vlanif10 ip address 10.10.10.253 255.255.255.0 vrrp vrid 10 virtual-ip 10.10.10.254 ospf cost 2#interface Vlanif20 ip address 10.10.20.253 255.255.255.0 vrrp vrid 20 virtual-ip 10.10.20.254 ospf cost 2#interface Vlanif30 ip address 10.10.30.253 255.255.255.0 vrrp vrid 30 virtual-ip 10.10.30.254 vrrp vrid 30 priority 120 ospf cost 2 dhcp select relay dhcp relay server-ip 10.10.253.2#interface Vlanif40 ip address 10.10.40.253 255.255.255.0 vrrp vrid 40 virtual-ip 10.10.40.254 vrrp vrid 40 priority 120 ospf cost 2 dhcp select relay dhcp relay server-ip 10.10.253.26.AR1和AR2启用nat，配置默认路由出口，并将默认路由引入ospf进程中，让所有内网能访问外网；
AR1
acl number 2000 rule 5 permit source 10.10.0.0 0.0.255.255 interface GigabitEthernet0/0/2 ip address 202.100.1.1 255.255.255.248 nat outbound 2000ip route-static 0.0.0.0 0.0.0.0 202.100.1.2 引入默认路由步骤3有命令，可翻看参考AR2
acl number 2000 rule 5 permit source 10.10.0.0 0.0.255.255 interface GigabitEthernet0/0/2 ip address 202.100.2.1 255.255.255.248 nat outbound 2000ip route-static 0.0.0.0 0.0.0.0 202.100.2.2这样，一个典型的园区网，汇聚，核心，出口都有冗余和负载均衡。
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