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4511
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Cisco 1841 not routing between interfaces

silviu1983
Level 1
Level 1

Hy guys,

 

I have a question that has been bugging me for some time now

 

I have an CISCO router 1841 with 2 interfaces F0/1 and F0/0 and for testing purposes i have it in my LAN at home. The problem is though, in Packet Tracer I create 4 LANs all wired together with the 4 routers(1841) and i get to ping from one end to another . I configure the interfaces and all is good. However when I physically connect my 1841 router in my LAN , I cannot get past the router.

The layout is like this:

1. My TP LINK router that is directlly connected to the internet and acts as a DNS server and GATEWAY

 

2. The CISCO router in between the PC and the GATEWAY connected to F0/1 (192.168.1.x/24 NETWORK)

 

3. The PC that I use for daily tasks that is directlly connected to the F0/0 (10.90.0.X/24 NETWORK) of the router

 

Now, the problem I have is this:

From the PC I can ping F0/0 of the router and even F0/1 , but when I try to go beyond the router (to my GATEWAY) I get no reply back.

I have no ACL set in place on the router . The only thing I configured is the IP, MASK. I have tryed with static routes, default routes,( which I dont see the point because the router is directlly connected to both networks and should be aware of both - but I tryed that anyway) and still I get no reply back from the GATEWAY.

 

So my question is this

 

Does the 1841 router treats F0/0 as the WAN link and F0/1 as the LAN link as it is in the normal TPLINK  home router and this is why the traffic cannot get past the router?

 

 

 

15 Replies 15

Post the full running configuration of your 1841 router...