I try to perform a Rip v2 lab, it seems success that 2620 can learn some network
of from 1720 fast ethernet0, but I don't know why only 10.0.0.0/24 can't be learned.
do you know what's the problem ?
Pc(192.168.0.1) -> 1720 -> 2620 -> Nat router(192.168.169.254)
1720#sh ru
!
ip subnet-zero
!
!interface FastEthernet0
ip address 192.168.0.80 255.255.255.0 secondary
ip address 172.0.0.5 255.255.255.252 secondary
ip address 10.0.0.1 255.255.255.0 secondary
ip address 172.0.0.193 255.255.255.192
speed auto
!
interface Serial0
ip address 172.0.0.2 255.255.255.252
ip rip triggered
!
router rip
version 2
timers basic 30 180 0 240
network 10.0.0.0
network 172.0.0.0
network 192.168.0.0
!
ip classless
ip route 0.0.0.0 0.0.0.0 Serial0
no ip http server
!
1720#sh ip route
172.0.0.0/16 is variably subnetted, 3 subnets, 2 masks
C 172.0.0.192/26 is directly connected, FastEthernet0
C 172.0.0.4/30 is directly connected, FastEthernet0
C 172.0.0.0/30 is directly connected, Serial0
10.0.0.0/24 is subnetted, 1 subnets
C 10.0.0.0 is directly connected, FastEthernet0
C 192.168.0.0/24 is directly connected, FastEthernet0
R 192.168.169.0/24 [120/1] via 172.0.0.1, 00:47:26, Serial0
S* 0.0.0.0/0 is directly connected, Serial0
2620#sh ru
!ip subnet-zero
!
interface Ethernet0/0
ip address 192.168.169.252 255.255.255.0
ip nat outside
!
interface Serial0/0
description connect to RouterB
ip address 172.0.0.1 255.255.255.252
ip nat inside
ip rip triggered
no fair-queue
clockrate 4000000
!
router rip
version 2
timers basic 30 180 0 240
network 172.0.0.0
network 192.168.169.0
!
ip nat inside source list 1 interface Ethernet0/0 overload
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.169.254
no ip http server
!
access-list 1 permit 192.168.0.0 0.0.0.255
access-list 1 permit 10.0.0.0 0.0.0.255
!a
line con
2620# sh ip route
172.0.0.0/16 is variably subnetted, 3 subnets, 2 masks
R 172.0.0.192/26 [120/1] via 172.0.0.2, 00:49:10, Serial0/0
R 172.0.0.4/30 [120/1] via 172.0.0.2, 00:49:10, Serial0/0
C 172.0.0.0/30 is directly connected, Serial0/0
R 192.168.0.0/24 [120/1] via 172.0.0.2, 00:49:10, Serial0/0
C 192.168.169.0/24 is directly connected, Ethernet0/0
S* 0.0.0.0/0 [1/0] via 192.168.169.254
