I have a Cisco 3620 router and I am trying to get internet access. My isp is comcast. All modem lights seem to be operational. But I do not have internet access. I can ping anything other then the router and I am on a home network.
I have attached a config file. Please note I am a novice with cisco routers.
you've got no default route on the router, is your modem in bridged mode because you put a public IP on your interface facing the modem ? or is it also routing?
in first case then ip route 0.0.0.0 0.0.0.0 x.x.x.x where x.x.x.x is ISP default gateway
in second case then ip route 0.0.0.0 0.0.0.0 x.x.x.x where x.x.x.x is the ip address of the modem and change the ip address on the interface of the router or let the router get its ip address and default route from the modem with the command ip address dhcp
Thanks for your reply.
As I mentioned I'm a novice, so I am not sure were to make these chances.
Where you state first and second case do I change them under the inter e0/0 and e0/1 or enter them under the ip domain-name XXYYZZ.com section?
And I'm not sure about the bridged or routing question.
the default route is configured in global config mode.
were you connected to this modem before connecting the router? Is this ADSL or Cable modem ?
Its a cable modem.
were you connected to this modem before connecting the router? No, I edit and save my config and reboot the router and connect to the modem.
I added in the ip address to the modem, for the second case. Still no internet.
The ISP default gateway I can not find.
can you do this:
access-list 199 permit icmp any any
logging buffered debug
logging buffered 10000
no service timestamp debug
do debug ip pack detail 199
do debug arp
do ping 18.104.22.168 rep 2
do sh log
Post the output here.
When I type in do debug ip pack detail 199 I get invalid input at the do debug.
When I type do ? all I get back is <0-9>.<0-9> ver number. I guess my IOS does not support this function.
My IOS version is 12.2<13b>M2
I think you should try this config:
get rid of your static default routes then use this config and let us know if you can ping 22.214.171.124 from the router then try from the PC and finally test a ping to www.google.com from the host.
I edited the config file to duplicate as much as I could. I changed the two name servers, but still used the internal range of 192.168.3.x. I removed the static routes as you mentioned. Saved and rebooted router and all pings failed both from the router and pc.
From the pc the ping returns"Reply from 192.168.3.1: Destination host unreachable." when I ping 126.96.36.199. And from the router it also fils when I ping any of the name servers.