Cisco recommends using AES-CBC for encryption and SHA1 for authentication to protect against performance risks to some of its Catalyst and ASR gear. To reduce the risk of service problems, Cisco is ...

Well, at least one of you asked… and I did promise! Next we’ll move on to Type 5 (external) LSAs. (yeeha!) But if you didn’t yet vote for your top requests from Santa for this year, at least relative ...

Routing protocols have far-reaching effects on the performance and reliability of your network, but sorting out the differences between them can be a challenge. Choose the best one for your network by ...

OSPF is a popular interior gateway protocol, frequently encountered by network engineers. Here’s how to get it up and running in a network. Open shortest path first, or OSPF, is a routing protocol ...

“DNS is down and nothing is working!” is not something anyone ever wants to hear at 3am. Virtually every service on a modern network depends on DNS to function. When DNS goes down, you can't send mail ...