Last week’s Nexus 9000 and Application Centric Architecture launch triggered an avalanche of opinions. Some bloggers focused on the fact tha...
Showing posts with label Fabric. Show all posts
Showing posts with label Fabric. Show all posts
Finally: Juniper Supports a Leaf-and-Spine Virtual Chassis
The recent Juniper product launch included numerous components, among them: a new series of data center switches (including a badly-needed ...
Flow Table Explosion with OpenFlow 1.0 (And Why We Need OpenFlow 1.3)
The number of flows in hardware switches (dictated by the underlying TCAM size) is one of the major roadblocks in a large-scale OpenFlow dep...
Forwarding Models in OpenFlow Networks
A few days ago Tom ( @NetworkingNerd ) Hollingsworth asked a seemingly simple question : “ OpenFlow programs hop-by-hop packet forwarding, r...
The Intricacies of Optimal Layer-3 Forwarding
I must have confused a few readers with my blog posts describing Arista’s VARP and Enterasys’ Fabric Routing – I got plenty of questions a...
Configure physical firewalls based on VM groups? Sure, use DSE from Plexxi
Plexxi has an interesting problem. They have a shiny new solution that requires unorthodox approaches to network forwarding and allows the...
Plexxi PSI: MAU at Gigabit Speed
Regardless of the advantages of photonic switching ( David Husak claims it’s 20.000 times more effective than electronic switching ), the pr...
Migrating a cold VM into a foreign subnet
Moving a running VM into a foreign subnet is Mission Impossible due to stale ARP entries (anyone telling you otherwise is handwaving over ...
Overlay Networks and QoS FUD
One of the usual complaints I hear whenever I mention overlay virtual networks is “ with overlay networks we lose all application visibility...
How Much Data Center Bandwidth Do You Really Need?
Networking vendors are quick to point out how the opaqueness (read: we don’t have the HW to look into it) of overlay networks presents visib...
Layer-2 DCI with Enterasys Switches
The second half of the Enterasys DCI Solutions webinar focused on real-life case studies. First the less interesting one: long-distance liv...
The Plexxi Challenge (or: Don’t Blame the Tools)
Plexxi has an incredibly creative data center fabric solution: they paired data center switching with CWDM optics, programmable ROADMs and c...
Optimal Layer-3 Forwarding with Active/Active VRRP (Enterasys Fabric Routing)
Enterasys implemented optimal layer-3 forwarding with an interesting trick: they support VRRP like any other switch vendor, but allow you t...
Data Center Fabrics Built with Plexxi Switches
During the recent Data Center Fabrics Update webinar Dan Backman from Plexxi explained how their innovative use of CWDM technology and cont...
Arista EOS Virtual ARP (VARP) Behind the Scenes
In the " Optimal L3 Forwarding with VARP and Active/Active VRRP " blog post I made a remark along the lines of "Things might ...
VRRP, Anycasts, Fabrics and Optimal Forwarding
The Optimal L3 Forwarding with VARP/VRRP post generated numerous comments, ranging from technical questions about VARP (more about that in ...
Optimal L3 Forwarding with VARP and Active/Active VRRP
I’ve blogged about the need for optimal L3 forwarding across the whole data center almost a year ago when I introduced it as one of the int...
Build Data Center Interconnects with Enterasys Switches
Short story: Enterasys data center switches have an interesting combination of time-tested routing and bridging features that allow you to ...
Update: TRILL on HP Data Center Switches
A few days after I published the Interop Product Launch Craze post, Jason Edelman told me HP claims they have running TRILL implementation...
Dell Fabric Manager Explained
In the last part of Clos Fabrics Explained webinar Brad Hedlund described how you can use Dell Fabric Manager to plan, design, configure ...