思科交换机连接到2个路由器

我有以下设置：

左边的路由器是一个棍子上的路由器，用于在具有不同VLAN的LAN内路由stream量。

左边的交换机是我们LAN的根交换机，可以作为VTP服务器。 这也连接到路由器6。

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这是我想要做的：

我想用这四台路由器将这个局域网连接到一个未来的其他局域网（这个局域网将以类似的方式连接到路由器4和5），因为这个连接必须是高可用的。

但是，当然，交换机不能有2个默认网关（对吧？），我不能给路由器在相同的范围内的IP地址。 我将如何最好地解决这个问题？ 这样，交换机就可以ping任何这些路由器，并在将来ping任何其他LAN中的设备。

这里是运行configuration：

路由器在左边：

Building configuration... Current configuration : 1291 bytes ! version 12.4 no service timestamps log datetime msec no service timestamps debug datetime msec no service password-encryption ! hostname Router ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface FastEthernet0/0 no ip address duplex auto speed auto ! interface FastEthernet0/0.1 encapsulation dot1Q 1 native ip address 192.168.1.1 255.255.255.0 ! interface FastEthernet0/0.10 encapsulation dot1Q 10 ip address 192.168.10.1 255.255.255.0 ip helper-address 192.168.2.2 ! interface FastEthernet0/0.20 encapsulation dot1Q 20 ip address 192.168.20.1 255.255.255.0 ip helper-address 192.168.2.2 ! interface FastEthernet0/0.30 encapsulation dot1Q 30 ip address 192.168.30.1 255.255.255.0 ip helper-address 192.168.2.2 ! interface FastEthernet0/0.40 encapsulation dot1Q 40 ip address 192.168.40.1 255.255.255.0 ip helper-address 192.168.2.2 ! interface FastEthernet0/0.99 encapsulation dot1Q 99 ip address 192.168.99.1 255.255.255.0 ip helper-address 192.168.2.2 ! interface FastEthernet0/1 ip address 192.168.2.1 255.255.255.0 duplex auto speed auto ! interface Vlan1 no ip address shutdown ! router ospf 1 log-adjacency-changes network 192.168.2.0 0.0.0.255 area 0 network 192.168.1.0 0.0.0.255 area 0 ! ip classless ! ! ! ! ! ! ! line con 0 line vty 0 4 login ! ! ! end 

打开左边：

 Building configuration... Current configuration : 1907 bytes ! version 12.2 no service timestamps log datetime msec no service timestamps debug datetime msec no service password-encryption ! hostname Switch ! ! ! interface FastEthernet0/1 switchport trunk native vlan 99 switchport mode trunk ! interface FastEthernet0/2 switchport trunk native vlan 99 switchport mode trunk ! interface FastEthernet0/3 switchport trunk native vlan 99 switchport mode trunk ! interface FastEthernet0/4 switchport trunk native vlan 99 switchport mode trunk ! interface FastEthernet0/5 switchport trunk native vlan 99 switchport mode trunk ! interface FastEthernet0/6 switchport trunk native vlan 99 switchport mode trunk ! interface FastEthernet0/7 switchport trunk native vlan 99 switchport mode trunk ! interface FastEthernet0/8 switchport trunk native vlan 99 switchport mode trunk ! interface FastEthernet0/9 switchport trunk native vlan 99 switchport mode trunk ! interface FastEthernet0/10 switchport trunk native vlan 99 switchport mode trunk ! interface FastEthernet0/11 ! interface FastEthernet0/12 ! interface FastEthernet0/13 ! interface FastEthernet0/14 ! interface FastEthernet0/15 ! interface FastEthernet0/16 ! interface FastEthernet0/17 ! interface FastEthernet0/18 ! interface FastEthernet0/19 ! interface FastEthernet0/20 ! interface FastEthernet0/21 ! interface FastEthernet0/22 ! interface FastEthernet0/23 ! interface FastEthernet0/24 ! interface GigabitEthernet1/1 switchport trunk native vlan 99 switchport mode trunk ! interface GigabitEthernet1/2 switchport trunk native vlan 99 switchport mode trunk ! interface Vlan1 no ip address shutdown ! interface Vlan10 no ip address ! interface Vlan20 no ip address ! interface Vlan30 no ip address ! interface Vlan40 no ip address ! interface Vlan99 ip address 192.168.1.2 255.255.255.0 ! ip default-gateway 192.168.1.1 ! ! line con 0 ! line vty 0 4 login line vty 5 15 login ! ! end 

Router6

 Building configuration... Current configuration : 630 bytes ! version 12.4 no service timestamps log datetime msec no service timestamps debug datetime msec no service password-encryption ! hostname Router ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface FastEthernet0/0 ip address 172.16.1.1 255.255.255.0 duplex auto speed auto ! interface FastEthernet0/1 ip address 172.16.2.1 255.255.255.0 duplex auto speed auto ! interface Serial0/0/0 no ip address ! interface Serial0/0/1 no ip address ! interface Serial0/1/0 no ip address ! interface Serial0/1/1 no ip address ! interface Vlan1 no ip address shutdown ! ip classless ! ! ! ! ! ! ! line con 0 line vty 0 4 login ! ! ! end 

 ip sla 4 icmp-echo 10.10.10.2 source-interface FastEthernet0 threshold 1000 frequency 5 ip sla schedule 4 life forever start-time now track 4 ip sla 4 delay down 5 up 3 ip route 0.0.0.0 0.0.0.0 1.1.1.1 track 4