需求描述
不同网段访问互联网资源时,走不同的出口,即PC1走电信出口,PC2走移动出口。
客户在内网接口下应用策略路由后往往出现无法访问内网管理地址的现象,该举例给出解决办法。
拓扑图
基础配置
# sysname R1 # # interface GigabitEthernet0/0/0 ip address 10.10.10.2 255.255.255.0 # interface GigabitEthernet0/0/1 ip address 30.30.30.1 255.255.255.0 # # ospf 1 import-route static area 0.0.0.0 network 30.30.30.1 0.0.0.0 # ip route-static 172.16.0.0 255.255.0.0 10.10.10.1 #
# sysname R2 # # interface GigabitEthernet0/0/0 ip address 20.20.20.2 255.255.255.0 # interface GigabitEthernet0/0/1 ip address 40.40.40.1 255.255.255.0 # # ospf 1 import-route static area 0.0.0.0 network 40.40.40.1 0.0.0.0 # ip route-static 172.16.0.0 255.255.0.0 20.20.20.1 #
# sysname R3 # # interface GigabitEthernet0/0/0 ip address 10.10.10.1 255.255.255.0 # # interface GigabitEthernet0/0/1 ip address 20.20.20.1 255.255.255.0 # # interface GigabitEthernet0/0/2.1 dot1q termination vid 10 ip address 172.16.1.1 255.255.255.0 arp broadcast enable # interface GigabitEthernet0/0/2.2 dot1q termination vid 20 ip address 172.16.2.1 255.255.255.0 arp broadcast enable # # ip route-static 0.0.0.0 0.0.0.0 10.10.10.2 ip route-static 0.0.0.0 0.0.0.0 20.20.20.2 #
在R4上创建一个lo 100接口来模拟互联网:
# sysname R4 # # interface GigabitEthernet0/0/0 ip address 30.30.30.2 255.255.255.0 # interface GigabitEthernet0/0/1 ip address 40.40.40.2 255.255.255.0 # # interface LoopBack100 ip address 100.100.100.100 255.255.255.0 # ospf 1 area 0.0.0.0 network 30.30.30.2 0.0.0.0 network 40.40.40.2 0.0.0.0 network 100.100.100.100 0.0.0.0 #
现在我们未使用策略路由前先测试一下PC1、PC2访问互联网时,各种路径走向是如何的?
从上述结果来看,可知,
PC1访问互联网资源100.100.100.100时,是走R2(移动)的;
PC2访问互联网资源100.100.100.100时,是走R1(电信)的;
我们的需求是,希望PC1走电信出口(R1),PC2走移动(R2)出口。
关键配置
# acl number 3000 //第一个网段地址 rule 5 permit ip source 172.16.1.0 0.0.0.255 acl number 3001 //第二个网段地址 rule 5 permit ip source 172.16.2.0 0.0.0.255 acl number 3002 //允许两个网段地址访问网关 rule 5 permit ip source 172.16.1.0 0.0.0.255 destination 172.16.1.1 0 rule 10 permit ip source 172.16.2.0 0.0.0.255 destination 172.16.2.1 0 # //流分类 ,匹配对应的ACL traffic classifier c2 if-match acl 3002 traffic classifier c0 if-match acl 3000 traffic classifier c1 if-match acl 3001 # # //流行为,配置响应的动作 traffic behavior b0 redirect ip-nexthop 10.10.10.2 traffic behavior b1 redirect ip-nexthop 20.20.20.2 traffic behavior b2 permit # //流策略,把分类对应行为关联起来 traffic policy p1 classifier c0 behavior b0 classifier c1 behavior b1 classifier c2 behavior b2 # # //内网接口入方向调研 流策略 interface GigabitEthernet0/0/2.1 traffic-policy p1 inbound # interface GigabitEthernet0/0/2.2 traffic-policy p1 inbound
结果验证
从上述结果来看,可知,PC1访问互联网资源100.100.100.100时,已经是走R1(电信)的;
PC2访问互联网资源100.100.100.100时,已经是走R2(移动)的;