设备：Juniper EX4200
路由实例：new_instance，new_instance1,new_instance2
文章给出EX4200启动三个路由实例实现网络互连，使用OSPF动态路由方式，可下载配置文件。
配置要点：
1）三个实例的ge接口都配置如图所示的ip地址
2）三个实例的ge接口都划拨到area 0.0.0.0主干域中
3）每个实例都配置ospf协议而替代静态路由方式
ospf_routing_instance_cfgospf_routing_instance_cfg_allospf_routing_table附：
test@ex4200# run show route
+ = Active Route, - = Last Active, * = Both
Reject
192.168.10.1/32 *[Local/0] 07:39:50
Reject
192.168.20.1/32 *[Local/0] 07:39:50
Reject
192.168.100.1/32 *[Local/0] 07:39:50
Reject
192.168.101.1/32 *[Local/0] 07:39:50
Reject
224.0.0.22/32 *[IGMP/0] 07:39:52
MultiRecv
+ = Active Route, - = Last Active, * = Both
> via ge-0/0/18.0
101.7.156.1/32 *[Local/0] 06:28:06
Local via ge-0/0/18.0
101.7.157.0/24 *[OSPF/10] 00:00:38, metric 2
to 101.7.158.1 via ge-0/0/22.0
> to 101.7.156.2 via ge-0/0/18.0
101.7.158.0/24 *[Direct/0] 00:22:13
> via ge-0/0/22.0
101.7.158.2/32 *[Local/0] 07:39:46
Local via ge-0/0/22.0
172.16.1.0/24 *[OSPF/10] 00:01:13, metric 2
> to 101.7.158.1 via ge-0/0/22.0
192.168.50.0/24 *[Direct/0] 00:48:43
> via ge-0/0/16.0
192.168.50.1/32 *[Local/0] 07:39:46
Local via ge-0/0/16.0
192.168.60.0/24 *[OSPF/10] 00:00:38, metric 2
> to 101.7.156.2 via ge-0/0/18.0
224.0.0.5/32 *[OSPF/10] 00:52:38, metric 1
MultiRecv
new_instance1.inet.0: 10 destinations, 10 routes (10 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
101.7.156.0/24 *[OSPF/10] 00:01:08, metric 2
> to 101.7.158.2 via ge-0/0/10.0
to 101.7.157.1 via ge-0/0/14.0
101.7.157.0/24 *[Direct/0] 00:24:57
> via ge-0/0/14.0
101.7.157.2/32 *[Local/0] 06:28:06
Local via ge-0/0/14.0
101.7.158.0/24 *[Direct/0] 00:22:13
> via ge-0/0/10.0
101.7.158.1/32 *[Local/0] 07:39:47
Local via ge-0/0/10.0
172.16.1.0/24 *[Direct/0] 01:14:34
> via ge-0/0/12.0
172.16.1.1/32 *[Local/0] 07:39:47
Local via ge-0/0/12.0
192.168.50.0/24 *[OSPF/10] 00:01:13, metric 2
> to 101.7.158.2 via ge-0/0/10.0
192.168.60.0/24 *[OSPF/10] 00:01:08, metric 2
> to 101.7.157.1 via ge-0/0/14.0
224.0.0.5/32 *[OSPF/10] 00:52:38, metric 1
MultiRecv
new_instance2.inet.0: 10 destinations, 11 routes (10 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
101.7.156.0/24 *[Direct/0] 00:01:19
> via ge-0/0/4.0
101.7.156.2/32 *[Local/0] 06:28:06
Local via ge-0/0/4.0
101.7.157.0/24 *[Direct/0] 00:24:57
> via ge-0/0/6.0
101.7.157.1/32 *[Local/0] 06:28:06
Local via ge-0/0/6.0
101.7.158.0/24 *[OSPF/10] 00:00:38, metric 2
> to 101.7.157.2 via ge-0/0/6.0
to 101.7.156.1 via ge-0/0/4.0
172.16.1.0/24 *[OSPF/10] 00:01:08, metric 2
> to 101.7.157.2 via ge-0/0/6.0
192.168.50.0/24 *[Static/5] 00:01:19
> to 101.7.156.1 via ge-0/0/4.0
[OSPF/10] 00:00:38, metric 2
> to 101.7.156.1 via ge-0/0/4.0
192.168.60.0/24 *[Direct/0] 00:42:28
> via ge-0/0/8.0
192.168.60.1/32 *[Local/0] 06:28:06
Local via ge-0/0/8.0
224.0.0.5/32 *[OSPF/10] 00:56:49, metric 1
MultiRecv
{master:0}[edit routing-instances new_instance2 routing-options]
test@ex4200#