This post is a continuation of “Campus High Level Design – Sample Physical Topology, Part 1”. The example depicted in the first part was a
I thought it would be useful to do a few posts once in a while, with more of a campus focus. With any design workshop,
Some of the content i had committed during the early days of the blog, specifically on VLT – continues to receive a lot of traffic/queries.
A short & sharp comparison of Layer 3/ECMP Leaf & Spine vs. Layer 2 Multi-chassis Link Aggregation, e.g. Dell EMC VLT (Virtual Link Trunking) Topologies.
In essence, Spline collapses the Leaf & Spine functions – much like the Functions of Core & Aggregation Layers in a traditional 3-tier topology, would
Core Config Options: First Hop/Gateway Redundancy: VRRP: Same Switch hosts VRRP and STP Master-ship for deterministic forwarding @ L2/L3 and eliminate suboptimal forwarding path. In
. I have already given a non-technical synopsis on VLT in one of my previous posts here https://hasanmansur.com/2012/10/15/force10-s4810-stacking-vs-vlt/ As mentioned, VLT Is a Dual Active Control
. Cisco offers three solutions for eliminating STP. These comprise the stacking feature on 3750/2950 models, VSS on 6500s, and vPC on Nexus 5k/7k platforms.