Cisco 3640 router problem

I currently have the router configured and the LAN works great, i can ping every computer on the network but the internet is not working.

I set up interface0/0 for internet and interface 0/1 for LAN, i defined the defualt gateway by doing ip route 0.0.0.0 255.255.255.0 63.85.188.203 (the ip address of the HDSL modem) so any traffic not found in the routing table should get sent to the modem, and when i trace a packet it seems to make it out of the network but does not reach the destination.

I currently have no routing protocols since the DHCP is handled on the server, what could be some possible causes for this?


thank you

dvanpelt

[reidar]

Originally Posted by dvanpelt

I currently have the router configured and the LAN works great, i can ping every computer on the network but the internet is not working.

I set up interface0/0 for internet and interface 0/1 for LAN, i defined the defualt gateway by doing ip route 0.0.0.0 255.255.255.0 63.85.188.203 (the ip address of the HDSL modem) so any traffic not found in the routing table should get sent to the modem, and when i trace a packet it seems to make it out of the network but does not reach the destination.

I currently have no routing protocols since the DHCP is handled on the server, what could be some possible causes for this?


thank you

Network Address Translation ?

reidar

[mshaijo]

can you post the relevant configuration ?

mshaijo

[dvanpelt]

I have made progress, I got the router to function properly giving everyone internet for about a day, then it went down. I turned the router off and back on and it worked for about a day or 2 then stopped. Here is the current configuration, any idea why it stops working?

Current configuration : 1405 bytes
!
! Last configuration change at 13:44:27 UTC Mon Oct 19 2009
! NVRAM config last updated at 13:44:31 UTC Mon Oct 19 2009
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Shaftdrillers
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$WoI/$chsvq1pDwKPpgiKm827Xx.
!
no aaa new-model
!
resource policy
!
!
ip cef
no ip domain lookup
ip name-server 63.66.160.10
ip name-server 63.66.160.11
!
!
username admin privilege 15 password 0 admin
!
!
interface Ethernet0/0
description WAN
ip address 63.86.188.203 255.255.255.0
ip nat outside
ip virtual-reassembly
half-duplex
!
interface Ethernet0/1
description LAN
ip address 192.168.1.1 255.255.255.0
ip nat inside
ip virtual-reassembly
full-duplex
!
ip http server
ip http authentication local
!
ip route 0.0.0.0 0.0.0.0 63.86.188.201
ip route 63.86.188.0 255.255.255.0 0.0.0.0
ip route 192.168.1.0 255.255.255.0 0.0.0.0
ip route 192.168.3.0 255.255.255.0 192.168.1.254
!
ip nat pool ovrld 63.86.188.203 63.86.188.203 prefix-length 24
ip nat inside source list 7 pool ovrld overload
!
!
ip access-list extended NAT_ADDRESSES
permit ip 192.168.1.0 0.0.0.255 any
access-list 7 permit 192.168.1.0 0.0.0.255
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
logging synchronous
line aux 0
line vty 0 4
login
!
!
end

dvanpelt

[dvanpelt]

Also, when i type sh ip int brief it shows both ethernet interfaces and NVI0 interface which i am guessing is the virtual interface for NAT.

NVIO doesn't have an assigned IP address, is not okay, method is not set, but the status and protocol are up.

I am guessing either the NVIO needs set up or the NAT is overloading after a day or 2 which is causing the router to stop working, I read about clearing the buffer for the NAT but I am not sure if this is necessary, especially since many people on the network are logged into a SQL server database.


Any ideas on how to keep this router working?


Thank you all for the help you have given me so far

dvanpelt

[luix]

Originally Posted by dvanpelt

Also, when i type sh ip int brief it shows both ethernet interfaces and NVI0 interface which i am guessing is the virtual interface for NAT.

NVIO doesn't have an assigned IP address, is not okay, method is not set, but the status and protocol are up.

I am guessing either the NVIO needs set up or the NAT is overloading after a day or 2 which is causing the router to stop working, I read about clearing the buffer for the NAT but I am not sure if this is necessary, especially since many people on the network are logged into a SQL server database.


Any ideas on how to keep this router working?


Thank you all for the help you have given me so far

NVIO is NULL0 interface, is something for security, nothing related to nat. I also have that interface on my 3640 and on my 877 and I don't even use it.

luix