We have a Cisco 2921 router that has been working for several years. Our connection suddenly dropped during operation and the only solution that worked was to use the ISP’s provided ip address. No changes have been made previously on our router that ...

Recently some of our users complained not reaching some sites. So I did some steps to isolate the problem.1. ISP port -> Single workstation (I was able to reach any site without any problem).2. ISP port -> Router -> Single workstation ( Like the firs...

We have a Cisco 3700 router that has been working for years using the default route 'route ip 0.0.0.0 0.0.0.0 F0/0'. Strangely, our connection(in/out) suddenly dropped and the only solution that worked was to set  the default route to 'route ip 0.0.0...