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[Guest article from my friend Dominic Basta. Thanks again, Dominic!]I thought I'd share my experiences working with switch profiles on Cisco Nexus 5000 switches. Cisco suggests using switch profiles for the following reasons: •    Allows configurations to be synchronized between switches. •    Merges configurations when connectivity is established between two…

Under certain circumstances, when opening Outlook on a Windows computer, ViewMail may throw the following error: Cisco ViewMail encountered one or more errors.  ViewMail functionality is not available for the [...]

Are you planning to use a Nexus 2000 FEX with one of the new F2 cards in a Nexus 7000? If so, there are some rules about how it connect [...]

The newer versions of NX-OS support 1G or 10G on the N5K, but the N5K is not auto-speed sensing. A mini case study follows.

Address spoofing protections, collectively known as “layer two” protections, thwart malicious attempts to falsify or spoof IP or MAC addresses in order to gain unauthorized access to your network.  There [...]

I just heard something you might want to know about the Cisco Nexus 7000 F2 Card. That got me motivated to post some thoughts and questions I have about this [...]

I just finished wrapping up all of the logistics for a trip I am making at the end of the month to beautiful San Jose, CA. I will be representing [...]

Here is my list of the top ten security mistakes that IT staff makes.  These mistakes leave your network vulnerable to attack and compromise. Mistake #4:  Internet Access For Servers.

I've recently been discussing Security in the Datacenter with a consulting customer. Their security folks are getting a lot of management support in one of the more stringent security pushes I've seen to date. The security team fell in love with Palo Alto Networks firewalls (UTM's), bought some big ones,…

Thanks to Bob Harper for his follow-up emails concerning my CMUG presentation on vPC, FEX, and Datacenter Virtualization. If you haven’t read the presentation, it can be found at  Follow-Up [...]

Here is my list of the top ten security mistakes that IT staff makes.  These mistakes leave your network vulnerable to attack and compromise. Mistake #5:  Caching Windows Credentials.