I have 2 Cisco 1720 routers connected over a T1 line I can ping the inside interface of either router from the outside interface of the other, but I cannot ping from an inside interface to an inside interface I am attaching the show run from each router, the names have been changed to protect the innocent ;-)
Router A#sh ru
Building configuration...
Current configuration : 1033 bytes
version 12.2
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
hostname Router A
enable secret xxx
memory-size iomem 25
ip subnet-zero
ip name-server 205.171.3.65
ip name-server 205.171.2.65
interface FastEthernet0
ip address 192.168.0.4 255.255.255.0
ip nat inside
speed auto
interface Serial0
ip address 192.168.101.1 255.255.255.0
ip nat outside
no fair-queue
service-module t1 clock source internal
service-module t1 timeslots 1-24
ip nat inside source list 131 interface Serial0 overload
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.0.1
ip route 10.6.18.0 255.255.255.0 192.168.101.2
ip http server
access-list 2 permit 10.6.18.0 0.0.0.255
access-list 4 permit 192.168.0.0 0.0.0.255
access-list 5 permit 192.168.101.0 0.0.0.255
arp 10.6.18.5 00c0.b607.d30b ARPA
arp 10.6.18.1 0010.e004.6ccb ARPA
line con 0
logging synchronous
line aux 0
line vty 0 4
absolute-timeout 60
login
no scheduler allocate
end
========================================
Router B#sh ru
Building configuration...
Current configuration : 1453 bytes
version 12.2
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
hostname Router B
enable secret xxx
memory-size iomem 25
ip subnet-zero
ip name-server 205.171.3.65
ip name-server 205.171.2.65
interface Tunnel1
no ip address
interface FastEthernet0
ip address 10.6.18.4 255.255.255.0
ip nat inside
speed auto
interface Serial0
ip address 192.168.101.2 255.255.255.0
ip accounting output-packets
ip nat outside
no fair-queue
service-module t1 clock source internal
service-module t1 timeslots 1-24
interface Serial1
ip address 192.168.100.4 255.255.255.0
ip accounting output-packets
ip nat outside
no fair-queue
service-module t1 timeslots 1-24
ip classless
ip forward-protocol udp 5631
ip forward-protocol udp 5632
ip route 0.0.0.0 0.0.0.0 10.6.18.2
ip route 192.168.1.0 255.255.255.0 192.168.100.3
ip route 192.168.1.0 255.255.255.0 192.168.100.1
ip http server
access-list 1 permit 192.168.0.0 0.0.0.255
access-list 2 permit 10.6.18.0 0.0.0.255
access-list 3 permit 192.168.100.0 0.0.0.255
access-list 4 permit 192.168.1.0 0.0.0.255
access-list 5 permit 192.168.101.0 0.0.0.255
access-list 121 permit ip 192.168.0.0 0.0.255.255 any
access-list 130 permit ip any host 10.6.18.1
arp 10.6.18.5 00c0.b607.d30b ARPA
line con 0
logging synchronous
line aux 0
line vty 0 4
session-timeout 60
absolute-timeout 60
login
end
If you see anything I need to try please let me know.
Thanks
Dale
