我的网络拓扑如下
从 R1，我无法 ping R3。
R3 上的数据包捕获显示收到回显请求，但没有来自 R3 的回复。
事实证明，show ip route即使我已经放置了配置，然后没有出现默认网关wr mem
这有什么问题？
如何解决？
R1
R1#sh run | i ga
ip default-gateway 192.168.10.2
R1#
R1#show ip route
Default gateway is 192.168.10.2
Host Gateway Last Use Total Uses Interface
ICMP redirect cache is empty
R1#
R3
R3#sh run | i ga
ip default-gateway 10.10.10.2
R3#
R3#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
10.0.0.0/24 is subnetted, 1 subnets
C 10.10.10.0 is directly connected, FastEthernet0/0
R3#
显示运行配置 R1
R1#sh run
Building configuration...
Current configuration : 1003 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip routing
no ip icmp rate-limit unreachable
no ip cef
!
no ip domain lookup
!
multilink bundle-name authenticated
!
archive
log config
hidekeys
!
ip tcp synwait-time 5
!
interface FastEthernet0/0
ip address 192.168.10.1 255.255.255.0
no ip route-cache
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
no ip route-cache
shutdown
duplex auto
speed auto
!
ip default-gateway 192.168.10.2
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
no cdp log mismatch duplex
!
control-plane
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
end
R1#
显示运行配置 R2
R2#show running-config
Building configuration...
Current configuration : 1130 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R2
!
boot-start-marker
boot-end-marker
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
no ip domain lookup
!
multilink bundle-name authenticated
!
archive
log config
hidekeys
!
ip tcp synwait-time 5
!
interface FastEthernet0/0
ip address 10.10.10.2 255.255.255.0
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.10.2 255.255.255.0
ip nat inside
ip virtual-reassembly
duplex auto
speed auto
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
ip nat inside source list NAT interface FastEthernet0/0 overload
!
ip access-list standard NAT
permit 192.168.0.0 0.0.0.255
!
no cdp log mismatch duplex
!
control-plane
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
end
R2#
显示运行配置 R3
R3#sh run
Building configuration...
Current configuration : 944 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R3
!
boot-start-marker
boot-end-marker
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
no ip domain lookup
!
multilink bundle-name authenticated
!
archive
log config
hidekeys
!
ip tcp synwait-time 5
!
interface FastEthernet0/0
ip address 10.10.10.3 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
ip default-gateway 10.10.10.2
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
no cdp log mismatch duplex
!
control-plane
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
end
R3#
如果您需要更多信息，请告诉我。