I'm a newbie on Routers and Cisco matter. I had been trying to set up a 1841 but I have several problems.
I have a network with a 2921 as Gateway and router for a hosted application subnet 10.20.0.X, also I have on the same network a 1841(a) 10.20.0.249 for my email an internet. All this is a temporal connection. I'm setting now my primary connection with another 1841(b), I'll take out the router (a) from the network and just leave router (b) with the same IP address than router a for the LAN. I can't access router 2921, it's not mine.
On my tests, I used the router 1841(b) to test the primary connection for internet and email it works perfect. I can open pages so fast, and I'm receiveing emails. For those test I put on the router address 10.20.0.20. When I made the swap address on the router b, I put on the router b the address that belongs to router a 10.20.0.249 and just unplug the router a from the network.
At this point, the router b still routing fine the emails but the internet come so slow and just open few pages, like google, gmail, xo, but it doesn't open cisco, godaddy, ebay, yahoo and others.
Any idea where will be the problem? In advance thank you for any help.