Hdr ib tor switch how to#

There is a controversy whether such topologies should be called fat-trees, or rather “(folded) Clos networks”, or anything else. Therefore, alternative topologies were proposed that can efficiently utilise existing switches with their fixed number of ports. 1, where the number of ports varies from switch to switch, is not very usable. However, for enterprise networks that connect servers, commodity (off-the-shelf) switches are used, and they have a fixed number of ports. This set-up is particularly useful for networks-on-chip. Circles represent switches, and squares at the bottom are endpoints. Therefore, the links get “fatter” towards the top of the tree, and switch in the root of the tree has most links compared to any other switch below it:įig. The distinctive feature of a fat-tree is that for any switch, the number of links going down to its siblings is equal to the number of links going up to its parent in the upper level. Such network is a tree, and processors are connected to the bottom layer. By cleverly connecting switching elements and forming a topology, a network can interconnect an impressive amount of endpoints.įat-Tree networks were proposed by Charles E. In a switched fabric - a network topology that uses switches - the main goal is to connect a large number of endpoints (processors or servers) by using switches that only have a limited number of ports. Teach Yourself Fat-Tree Design in 60 Minutes Introduction I am brave and bold, get me right to the tool! It provides an introduction to the method and the algorithm used by the tool. Please read the following “Fat-trees Primer” before using the tool. The tool demonstrates the process of designing cost-efficient two-level fat-tree networks for your cluster supercomputers. For fat-tree networks built with Ethernet hardware, check this See also: my articles on designing fat-tree and torus networks.Ģ.

Hdr ib tor switch how to#

Learn how to design fat-tree networks and use our simple tool for designing your own interconnection networks!ġ.