brownmab53
Technical User
Hello,
I am new to this forum. I would like to introduce myself as a Cisco hobbyist. I do not have any Cisco certifications or vast experience on Cisco equipment. The only knowledge I have of Cisco devices is through personal study and troubleshooting networks off and on during my military career.
I would begin with the problem that I have titled on this thread. I have a Cisco 3660 router configured with a NM-16ESW, NM-1FE-TX, and NM-CE-80G-K9 modules. Originally the router was connected to Ubee (I don’t remember the model number) cable modem. On the LAN side, my computers access the router through a AT-8088/SC fiber optic switch connected to the NM-1FE-TX. On 15 Oct 2014, the computers on my network were unable to access the internet. When this problem first occurred, I went to my ISP [TWC] and exchanged the cable modem to a Motorola SB6141 cable modem, but the problem still existed. I have two 3620 routers, with different IOS loads, that I replaced the 3660 with, and the problem did not change. When I connect the router to my ISP, my ISP provides the router with an IP address. Furthermore, the router receives the DNS addresses, and the domain name which are forwarded to the computers on the network. If I replace the Cisco router a Linksys WRT54G router and a fiber optic media converter, the computers on my network are able to access the internet. I do not want to use the Linksys, or any other “Wal-Mart” routers. I would like to get the 3660 back up and running.
Troubleshooting Steps I have taken:
IOS Loads:
Configuration of router(s): (This was the configuration up until now.)
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname aaaaa
!
boot-start-marker
boot-end-marker
no aaa new-model
!
resource policy
!
memory-size iomem 15
clock timezone MT -6
!
!
!
ip cef
no ip dhcp use vrf connected
ip dhcp excluded-address 192.168.0.1 192.168.0.10
ip dhcp excluded-address 192.168.201.1 192.168.201.10
!
ip dhcp pool 192.168.0.0/24
import all
network 192.168.0.0 255.255.255.0
default-router 192.168.0.1
domain-name aaa.aaa
lease infinite
!
ip dhcp pool 192.168.201.0/24
network 192.168.201.0 255.255.255.0
domain-name aaa.aaa
default-router 192.168.201.1
dns-server 209.18.47.61 209.18.47.62
lease infinite
!
!
!
interface FastEthernet0/0
description Connected to WAN (Internet) from ISP
ip address dhcp
ip nat outside
ip virtual-reassembly
speed 100
full-duplex
!
interface FastEthernet1/0-1/15
description NM-16ESW ports
!
interface FastEthernet2/0
description Connected to Fiber Optic LAN
ip address 192.168.0.1 255.255.255.0
ip nat inside
ip virtual-reassembly
full-duplex
!
interface Vlan1
ip address 192.168.201.1 255.255.255.0
ip nat inside
ip virtual-reassembly
!
router rip
version 2
passive-interface FastEthernet0/0
network 192.168.0.0
network 192.168.201.0
!
ip http server
ip http secure-server
!
ip route 0.0.0.0 0.0.0.0 FastEthernet0/0
!
ip nat inside source list 10 interface FastEthernet0/0 overload
!
access-list 10 permit 192.168.0.0 0.0.0.255
access-list 10 permit 192.168.201.0 0.0.0.255
!
!
!
control-plane
!
!
end
The questions are:
Thanks for any help provided in this matter.
I am new to this forum. I would like to introduce myself as a Cisco hobbyist. I do not have any Cisco certifications or vast experience on Cisco equipment. The only knowledge I have of Cisco devices is through personal study and troubleshooting networks off and on during my military career.
I would begin with the problem that I have titled on this thread. I have a Cisco 3660 router configured with a NM-16ESW, NM-1FE-TX, and NM-CE-80G-K9 modules. Originally the router was connected to Ubee (I don’t remember the model number) cable modem. On the LAN side, my computers access the router through a AT-8088/SC fiber optic switch connected to the NM-1FE-TX. On 15 Oct 2014, the computers on my network were unable to access the internet. When this problem first occurred, I went to my ISP [TWC] and exchanged the cable modem to a Motorola SB6141 cable modem, but the problem still existed. I have two 3620 routers, with different IOS loads, that I replaced the 3660 with, and the problem did not change. When I connect the router to my ISP, my ISP provides the router with an IP address. Furthermore, the router receives the DNS addresses, and the domain name which are forwarded to the computers on the network. If I replace the Cisco router a Linksys WRT54G router and a fiber optic media converter, the computers on my network are able to access the internet. I do not want to use the Linksys, or any other “Wal-Mart” routers. I would like to get the 3660 back up and running.
Troubleshooting Steps I have taken:
1.Changed routers out
2.Re-Flashed the 3660 (Possible corrupt IOS image)
3.Changed NM modules
4.Changed network cables
5.Called ISP (No help there. ISP states all they can do is check the signal to the modem, and if it is good, then the rest is on me.)
6.Explored other forums, but could not find this issue; however, at the recommendation of some posters, I made config changes as such:
ip nat inside source list 101 interface FastEthernet0/0 overload
!
access-list 101 permit ip 192.168.0.0 0.0.0.255 any
!
access-list 101 permit ip 192.168.0.0 0.0.0.255 any
IOS Loads:
3620: c3620-ik9o3s7-mz.123-22
3620: c3620-j1s3-mz.122-8.t5
3660: c3660-ik9o3s-mz.124-6.T
Configuration of router(s): (This was the configuration up until now.)
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname aaaaa
!
boot-start-marker
boot-end-marker
no aaa new-model
!
resource policy
!
memory-size iomem 15
clock timezone MT -6
!
!
!
ip cef
no ip dhcp use vrf connected
ip dhcp excluded-address 192.168.0.1 192.168.0.10
ip dhcp excluded-address 192.168.201.1 192.168.201.10
!
ip dhcp pool 192.168.0.0/24
import all
network 192.168.0.0 255.255.255.0
default-router 192.168.0.1
domain-name aaa.aaa
lease infinite
!
ip dhcp pool 192.168.201.0/24
network 192.168.201.0 255.255.255.0
domain-name aaa.aaa
default-router 192.168.201.1
dns-server 209.18.47.61 209.18.47.62
lease infinite
!
!
!
interface FastEthernet0/0
description Connected to WAN (Internet) from ISP
ip address dhcp
ip nat outside
ip virtual-reassembly
speed 100
full-duplex
!
interface FastEthernet1/0-1/15
description NM-16ESW ports
!
interface FastEthernet2/0
description Connected to Fiber Optic LAN
ip address 192.168.0.1 255.255.255.0
ip nat inside
ip virtual-reassembly
full-duplex
!
interface Vlan1
ip address 192.168.201.1 255.255.255.0
ip nat inside
ip virtual-reassembly
!
router rip
version 2
passive-interface FastEthernet0/0
network 192.168.0.0
network 192.168.201.0
!
ip http server
ip http secure-server
!
ip route 0.0.0.0 0.0.0.0 FastEthernet0/0
!
ip nat inside source list 10 interface FastEthernet0/0 overload
!
access-list 10 permit 192.168.0.0 0.0.0.255
access-list 10 permit 192.168.201.0 0.0.0.255
!
!
!
control-plane
!
!
end
The questions are:
1.Why the 3660 or 3620s do not work, but the WRT54G (that were built round the same time) works?
2.Did something change that makes the 3660 and the 3620s incompatible?
3.Is it an IOS issue?
4.(Expaned relates to questions #2 and 3) are the 3660 or 3620s a lost cause and I need to get later router?
Thanks for any help provided in this matter.