In the quest to build a data center network that is flat, fast and fault tolerant the networking industry has served up a new two-tier architecture made up of Top-of-Rack or ToR server connecting switches and highly dense Core switches. Core switches connect ToR devices. The key question is how best to provide switch connectivity to deliver a lossless, high performance, low latency fabric that supports virtualization mobility. The answer is found in Multi-Chassis Link Aggregation Group or MC-LAG, Transparent Interconnection of Lots of Links or TRILL and/or Shortest Path Bridging (SPB). Dhritiman Dasgupta Director of Product Marketing for Fabric and Switching Technologies at Juniper Networks discusses its QFabric approach and why TRILL’s hair pinning method to inter-VLAN routing is a poor approach. It’s a fascinating discussion that you have to listen to. You can also download a white paper on this topic here.
