Peter Welcher

One of my consulting customers pointed something out to me that I hadn’t known. IP helper (now DHCP relay) works differently on the Nexus 7000 than on the 6500. The [...]

I’ve seen gradually increasing interest in Cisco’s FabricPath technology, so it seems time to talk about designing for FabricPath. I’m going to provide some opinions and overview, and then point [...]

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 [...]

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'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 [...]

In this CMUG session I primarily discussed datacenter access layer virtualization. The content drew slides from several CiscoLive 2011 presentations, accompanied by some slides of my own. The intent was [...]

I recently prepared a vPC Best Practices Checklist, a list I and a consulting customer could use as a vPC configuration planning / review checklist. The information is a mix [...]

I got in some lab time working with vPC+ last week. I was teaching the week-long Nexus class DCUFI in Indianapolis. I teach it about once a month via FireFly [...]

This blog covers some undocumented tidbits about Nexus Licensing that you might want to know about. Thanks to Vinny Clements for some good discussions and for actually taking the bull [...]

I’ve been reading a lot of datacenter blogs lately. Inspired by the recent Thanksgiving day (in the U.S.), I’d like to say thanks to the bloggers who have kept me [...]

Best practice datacenter design architectures have changed — there are different and new datacenter designs now that can save you money. So why am I telling you this? Two reasons. First, I’ve [...]