We have a mpls setup with 6 locations.
I can telnet to all routers except for one. This setup has been in place for at least 5years. I was able to telnet to all of the routers until yesterday. There was no changes made to the infrastructure and now all of a sudden there is only on router that I can't telnet to. I receive the following error:
Could not open connection to the host, on port 23: Connect failed.
Why would this happen ?