NE20路由器在某大学采用双出口方式的典型应用案例

NE20路由器在某大学采用双出口方式

的典型应用案例

一、       组网：

要求：

1、两个出口分别连接教育网(CerNet)和电信(ChinaTel)；

2、内网所有用户均使用教育网合法IP地址；

3、通过配置静态路由，所有国内流量走教育网出口E4/0/0，所有国际流量走电信出口E4/0/1；

4、内网部分网段只能走教育网出口，部分PC只能走电信出口；

5、走电信出口需要做NAT。

二、解决方法：

关键配置举例

1、策略路由：

acl number 2033

 rule 0 permit source 202.204.115.126 0

 rule 1 permit source 222.28.112.166 0

 rule 2 permit source 202.204.116.101 0

 rule 3 permit source 202.204.118.107 0

 rule 4 permit source 202.204.125.83 0

 rule 5 permit source 202.204.112.71 0

 rule 6 permit source 202.204.115.68 0

 rule 7 permit source 202.204.112.68 0

 rule 8 permit source 202.204.112.69 0

 rule 9 permit source 202.204.117.64 0

 rule 10 permit source 202.204.112.66 0

 rule 11 permit source 202.204.112.67 0

 rule 12 permit source 202.204.115.67 0

 rule 13 permit source 202.204.126.66 0

 rule 14 permit source 202.204.120.69 0

 rule 15 permit source 202.204.120.67 0

 rule 16 permit source 202.204.112.72 0

 rule 17 permit source 202.204.120.65 0

 rule 18 permit source 202.204.112.63 0

 rule 19 permit source 222.28.112.228 0

 rule 20 permit source 202.204.115.46 0

 rule 21 permit source 202.204.125.15 0

 rule 22 permit source 202.204.112.13 0

 rule 23 permit source 202.204.119.10 0

 rule 24 permit source 202.204.114.253 0

 rule 25 permit source 211.71.149.171 0

 rule 26 permit source 202.204.115.222 0

 rule 27 permit source 222.28.119.8 0

 rule 28 permit source 202.204.125.188 0

 rule 29 permit source 202.204.125.135 0

 rule 30 deny  注①

acl number 2055

 rule 0 permit source 202.204.112.105 0

 rule 1 permit source 202.204.112.6 0

 rule 2 permit source 202.204.112.7 0

 rule 3 permit source 202.204.112.4 0

 rule 4 permit source 202.204.112.5 0

 rule 5 permit source 202.204.112.2 0

 rule 6 permit source 202.204.112.3 0

 rule 7 permit source 202.204.112.1 0

 rule 8 permit source 202.204.112.10 0

 rule 9 permit source 202.204.112.8 0

 rule 10 permit source 202.204.112.9 0

 rule 11 permit source 211.71.158.158 0

 rule 12 permit source 202.204.112.214 0

 rule 13 permit source 202.204.112.206 0

 rule 14 permit source 202.204.112.11 0

 rule 15 permit source 202.204.112.12 0

 rule 16 permit source 202.204.112.13 0

 rule 17 permit source 202.204.112.14 0

 rule 18 permit source 202.204.112.15 0

 rule 19 permit source 202.204.112.16 0

 rule 20 permit source 202.204.116.0 0.0.0.255

 rule 21 permit source 211.71.159.0 0.0.0.255

 rule 22 deny  注②

#

traffic classifier 2   //定义一个流分类

 if-match acl 2055  //匹配acl 2055

traffic classifier 1   //定义一个流分类

 if-match acl 2033  //匹配acl 2033

#

traffic behavior 2   //定义一个流动作

remark ip-nexthop 172.30.79.17 output-interface Ethernet4/0/1  //定义流动作的内容为指定下一跳

traffic behavior 1   //定义一个流动作

  remark ip-nexthop 202.112.5.229 output-interface Ethernet4/0/0  //定义流动作的内容为指定下一跳

#

qos policy 1     //定义一个QOS

 classifier 1 behavior 1  //将流分类和流动作关联

 classifier 2 behavior 2  //将流分类和流动作关联

#

interface Ethernet4/0/2

 description connect to Internal Netwrok

 ip address 202.204.112.65 255.255.255.0

 qos apply policy 1 inbound   //在入端口应用QOS

#

2、NAT配置：

#

 nat address-group 0 219.239.106.1 219.239.106.254 mask 255.255.255.0 //定义地址池地址

#

acl number 2000  //定义acl

 rule 0 permit source 202.204.112.0 0.0.15.255

 rule 1 permit source 211.71.144.0 0.0.15.255

 rule 2 permit source 222.28.112.0 0.0.15.255

 rule 3 deny

interface Ethernet4/0/1

 description connect to ChinaNet-FeiHua

 ip address 172.30.79.18 255.255.255.252

 nat outbound 2000 address-group 0  //在需要做nat的接口将acl和地址池关联

#

ip route-static 219.239.106.0 255.255.255.0 NULL0 注③ //将地址池地址指向黑洞路由

注①②目前的版本(VRP3.30-0330.12.NAT)在配置策略时需要注意一点：当存在两个（含）以上acl在一个端口下发时，配置deny规则会导致只有一个acl生效。注③如果地址池地址和接口地址不在同一网段，需要配置黑洞路由。