在JUNOS中启用OSPF 推荐

最近在学习JUNOS，刚刚起步，感觉从IOS过渡还是蛮快的，毕竟原理性的东西相通，今天特意做了一下OSPF，实验环境是ITAA的JUNOS虚拟机（哈哈打一下小广告），从以前不能识别Intel网卡到不支持组播再到现在的基本OK，虚拟机的发展还是挺迅速的，这对我们来讲无疑是莫大的帮助，好，不说这个，我们来看看如何在JUNOS中配置OSPF。

实验中利用JUNOS的逻辑路由器特性起了3台Router，分别为R1，R2，R3 ，拓扑为(lo0.0 1.1.1.1)R1---12.1.1.0---R2(lo0.1 2.2.2.2)---23.1.1.0----R3(lo0.2 3.3.3.3)，由于是逻辑上的路由器，实际的物理接口只有FXP0到FXP3，所以要打上Vlan-tagging，事实上就是每台逻辑路由器的单臂路由。

具体配置如下：（大家不要以为是C++ , JUNOS的show可读性还是很强的）

[edit]
root@Router1# show
## Last changed: 2008-06-02 21:52:49 UTC
version 8.5R1.14;
system {
host-name Router1;
domain-name mynetwork.com;
backup-router 192.168.15.2;
root-authentication {
encrypted-password "$1$rJIo5b.H$JOjbMEuowTG/IE1lh4Upo0"; ## SECRET-DATA
}
name-server {
192.168.15.3;
}
services {
web-management {
http {
port 80;
}
}
}
syslog {
user * {
any emergency;
}
file messages {
any notice;
authorization info;
}
file interactive-commands {
interactive-commands any;
}
}
}
logical-routers {
R1 {
interfaces {
fxp1 {
unit 10 {
vlan-id 10;
family inet {
address 12.1.1.1/30;
}
}
}
lo0 {
unit 0 {
family inet {
address 1.1.1.1/32;
}
}
}
}
protocols {
ospf {
area 0.0.0.0 {
interface fxp1.10;
interface lo0.0;
}
}
}
routing-options {
router-id 1.1.1.1;
}
}
R2 {
interfaces {
fxp2 {
unit 20 {
vlan-id 10;
family inet {
address 12.1.1.2/30;
}
}
unit 30 {
vlan-id 20;
family inet {
address 23.1.1.2/24;
}
}
}
lo0 {
unit 1 {
family inet {
address 2.2.2.2/32;
}
}
}
}
protocols {
ospf {
area 0.0.0.0 {
interface fxp2.20;
interface lo0.1;
interface fxp2.30;
}
}
}
routing-options {
router-id 2.2.2.2;
}
}
R3 {
interfaces {
fxp3 {
unit 30 {
vlan-id 20;
family inet {
address 23.1.1.3/24;
}
}
}
lo0 {
unit 2 {
family inet {
address 3.3.3.3/32;
}
}
}
}
protocols {
ospf {
area 0.0.0.0 {
interface lo0.2;
interface fxp3.30;
}
}
}
routing-options {
router-id 3.3.3.3;
}
}
}
interfaces {
fxp0 {
unit 0 {
family inet {
address 192.168.200.205/24;
}
}
}
fxp1 {
vlan-tagging;
}
fxp2 {
vlan-tagging;
}
fxp3 {
vlan-tagging;
}
}
routing-options {
static {
route 192.168.0.0/16 {
next-hop 192.168.200.1;
active;
}
}
}

然后在R1上查看路由表看是否学习到OSPF路由：

[edit]
root@Router1# run show route logical-router R1
inet.0: 7 destinations, 7 routes (7 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
1.1.1.1/32 *[Direct/0] 00:27:16
> via lo0.0
2.2.2.2/32 *[OSPF/10] 00:26:27, metric 10
> to 12.1.1.2 via fxp1.10
3.3.3.3/32 *[OSPF/10] 00:13:33, metric 20
> to 12.1.1.2 via fxp1.10
12.1.1.0/30 *[Direct/0] 00:27:16
> via fxp1.10
12.1.1.1/32 *[Local/0] 00:27:16
Local via fxp1.10
23.1.1.0/24 *[OSPF/10] 00:13:38, metric 20
> to 12.1.1.2 via fxp1.10
224.0.0.5/32 *[OSPF/10] 00:27:21, metric 1
MultiRecv

通过ping在R3上测试连通性：

root@Router1> ping 1.1.1.1 logical-router R3
PING 1.1.1.1 (1.1.1.1): 56 data bytes
64 bytes from 1.1.1.1: icmp_seq=0 ttl=63 time=3.499 ms
64 bytes from 1.1.1.1: icmp_seq=1 ttl=63 time=4.611 ms
64 bytes from 1.1.1.1: icmp_seq=2 ttl=63 time=4.507 ms
64 bytes from 1.1.1.1: icmp_seq=3 ttl=63 time=4.489 ms
^C
--- 1.1.1.1 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max/stddev = 3.499/4.276/4.611/0.451 ms

JUNOS的ping个人感觉比较诡异，就是不按Ctrl+C就不会停止，和IOS反差好大，一开始不知道这个键的时候，真是郁闷，ping死了给...

通过show在R2上查看OSPF邻居是否建立：

root@Router1> show ospf neighbor logical-router R2
Address Interface State ID Pri Dead
12.1.1.1 fxp2.20 Full 1.1.1.1 128 39
23.1.1.3 fxp2.30 Full 3.3.3.3 128 37