2611 router

Unanswered Question
Mar 27th, 2008

i have started to train for my CCNA. I bought a 2600 router and a 2900xl switch to hook up at home. I have been problems getting my router to get on the internet. I set up

e0/0 adpater and set the e0/1 to get dhcp from comcast. I am using a windows 2003 server for my internal DNS and DHCP. I set the nat inside and outside and my access list to permit any. I just can't sem to get a web page to open on my server

I have this problem too.
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mattcalderon Thu, 03/27/2008 - 09:33

Do you have a ip route to your e0/1 interface for routes to all unknown networks?

Command is as follows

"ip route int e0/1"

richard_krick Thu, 03/27/2008 - 10:09

here is the running-config it still did not work so i tried to put the route on both

interface Ethernet0/0

description Internet

ip address dhcp

ip nat outside

no ip route-cache



interface Ethernet0/1

description Internal

ip address

ip nat inside

no ip route-cache



ip nat inside source list 1 interface Ethernet0/0 overload

no ip http server

no ip http secure-server

ip classless

ip route Ethernet0/1

ip route Ethernet0/0



access-list 1 permit




mattcalderon Thu, 03/27/2008 - 10:16

you should only have one route.

Take ip route Ethernet0/1 out of your config.

Also try pinging google's ip or any internet ip and see if you get a reply. If you do a sh ip int brief, do you have an ip? Also are you connecting to a comcast DSL router?

Also have you verified your switch config is correct and the default gateway on your server is

richard_krick Thu, 03/27/2008 - 10:34

first how do i remove a route, second while in the router i can ping yahoo.com and get a responce but no for anything else(microsoft,google,ect)

I have nothing configured in the switch exept the ip address so i can telnet in. I have an ip from comcast( and my server is set to the

mattcalderon Thu, 03/27/2008 - 10:37

Just put a no in front of the ip route statement

Example: "no ip route int e0/1"

hmm you can only ping yahoo and nothing else? From your browser can you get to yahoo? If you can ping yahoo then you do have external access. Not sure why though you can not ping other web sites.

richard_krick Thu, 03/27/2008 - 10:53

when at the router#ping www.yahoo.com i get a responce, from windows IE or even the windows CDM i get page error or destionation host not found

mattcalderon Thu, 03/27/2008 - 11:03

Have you verified your dns config on your server? Try pinging from the router by IP, not URL. is one of google's ip.

Also try doing a nslookup from your server and see if you can resolve hostnames. If you cant, it sounds like a dns issue.

richard_krick Thu, 03/27/2008 - 11:19

no luck, I have three of comcasts DNS server address set as forwarders in my dns, i can see the router using them.

mattcalderon Thu, 03/27/2008 - 11:57

have you tried a trace route from your router to a public ip? I dont know why only yahoo would respond and not other public ip addresses.

richard_krick Thu, 03/27/2008 - 22:06

i have check and double checked all my settings. This is the adapter i have set to recive a ip address from comcast and when i console in to the router i see lines and lines just like this.

*Mar 1 00:09:49.385: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/

0, changed state to down

*Mar 1 00:09:52.218: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/

0, changed state to up

*Mar 1 00:09:54.638: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/

0, changed state to down

mattcalderon Fri, 03/28/2008 - 05:09

Have you checked your speed and duplex settings and do you have the correct cable type between the 2?

richard_krick Fri, 03/28/2008 - 09:15

Before i recived the router a foctory reset was done.

modem-router, router-switch, switch-pc all with straight though cat5

Richard Burts Mon, 03/31/2008 - 13:24


I would have thought that the connection from modem to router would be a cross over cable rather than a straight through as you seem to indicate. Try changing the cable and see if it makes any difference.



richard_krick Mon, 05/19/2008 - 18:24

just to let everyone know it was my older comcast modem. after i replced it everything work fine

Richard Burts Mon, 05/19/2008 - 19:06


Thank you for posting back to the forum to indicate that your issue was resolved and for identifying what did resolve it.




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