不同VPN实例的路由互相引入,以及将VPN实例的路由添加到默认的路由表中。
此案例要求默认路由表中添加进到aa的路由表中,aa和bb之间互通。
如图所示,R1各接口所在VPN实例及ip地址如图,R2、R3、R4各接口都是.1的ip地址,配置默认路由。
R1关键配置:
#
sysname R1
#
ip vpn-instance aa
route-distinguisher 1:1
vpn-target 1:1 import-extcommunity
vpn-target 1:1 export-extcommunity
#
ip vpn-instance bb
route-distinguisher 2:2
vpn-target 2:2 import-extcommunity
vpn-target 2:2 export-extcommunity
#
interface GigabitEthernet0/0
ip address 1.1.1.1 255.255.255.0
#
interface GigabitEthernet0/1
ip binding vpn-instance aa
ip address 192.168.1.1 255.255.255.0
#
interface GigabitEthernet0/2
ip binding vpn-instance bb
ip address 192.168.2.1 255.255.255.0
#
ip route-static 192.168.1.0 24 vpn-instance aa 192.168.1.2
ip route-static vpn-instance aa 1.1.1.0 24 1.1.1.1 public //关键配置
ip route-static vpn-instance aa 192.168.2.0 24 vpn-instance bb 192.168.2.2
ip route-static vpn-instance bb 192.168.1.0 24 vpn-instance aa 192.168.1.2
查看默认路由表及VPN路由表:
[R1]display ip routing-table
Destinations : 13 Routes : 13
Destination/Mask Proto Pre Cost NextHop Interface
0.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
1.1.1.0/24 Direct 0 0 1.1.1.1 GE0/0
1.1.1.0/32 Direct 0 0 1.1.1.1 GE0/0
1.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
1.1.1.255/32 Direct 0 0 1.1.1.1 GE0/0
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
127.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
192.168.1.0/24 Static 60 0 192.168.1.2 GE0/1
224.0.0.0/4 Direct 0 0 0.0.0.0 NULL0
224.0.0.0/24 Direct 0 0 0.0.0.0 NULL0
255.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
[R1]display ip routing-table vpn-instance aa
Destinations : 13 Routes : 13
Destination/Mask Proto Pre Cost NextHop Interface
0.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
127.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
192.168.1.0/24 Direct 0 0 192.168.1.1 GE0/1
192.168.1.0/32 Direct 0 0 192.168.1.1 GE0/1
192.168.1.1/32 Direct 0 0 127.0.0.1 InLoop0
192.168.1.255/32 Direct 0 0 192.168.1.1 GE0/1
192.168.2.0/24 Static 60 0 192.168.2.2 GE0/2
224.0.0.0/4 Direct 0 0 0.0.0.0 NULL0
224.0.0.0/24 Direct 0 0 0.0.0.0 NULL0
255.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
[R1]display ip routing-table vpn-instance bb
Destinations : 13 Routes : 13
Destination/Mask Proto Pre Cost NextHop Interface
0.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
127.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
192.168.1.0/24 Static 60 0 192.168.1.2 GE0/1
192.168.2.0/24 Direct 0 0 192.168.2.1 GE0/2
192.168.2.0/32 Direct 0 0 192.168.2.1 GE0/2
192.168.2.1/32 Direct 0 0 127.0.0.1 InLoop0
192.168.2.255/32 Direct 0 0 192.168.2.1 GE0/2
224.0.0.0/4 Direct 0 0 0.0.0.0 NULL0
224.0.0.0/24 Direct 0 0 0.0.0.0 NULL0
255.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
ip route-static vpn-instance aa 1.1.1.0 24 1.1.1.1 public //关键配置
这一条的public是关键配置,命令解释如下
public:指定静态路由下一跳处于公网实例。
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