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network_fundamentals [2022/02/11 14:28] richard [Campus LAN Design] |
network_fundamentals [2022/02/11 14:47] richard [Spine-Leaf LAN Design (aka Clos Architecture)] |
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* Core layer - fast forwarding of traffic for the Distribution layer. Ideally don't have ACLs or QoS, just fast traffic. | * Core layer - fast forwarding of traffic for the Distribution layer. Ideally don't have ACLs or QoS, just fast traffic. | ||
{{:cisco:three-tier-01fig06_alt.jpg?400|}}\\ | {{:cisco:three-tier-01fig06_alt.jpg?400|}}\\ | ||
- | The three-tier design has all 3 of the hierarchical layers. | + | //https://www.ciscopress.com/articles/article.asp?p=2202410&seqNum=4// \\ |
+ | The three-tier design has all 3 of the hierarchical layers.\\ | ||
+ | \\ | ||
+ | {{:cisco:two-tier-01fig08_alt.jpg?400|}}\\ | ||
+ | //https://www.ciscopress.com/articles/article.asp?p=2202410&seqNum=4// \\ | ||
+ | The two-tier "collapses" the core and distribution layers into one for smaller networks. | ||
===== Spine-Leaf LAN Design (aka Clos Architecture) ===== | ===== Spine-Leaf LAN Design (aka Clos Architecture) ===== | ||
The traditional campus LAN design is intended for networks where there is "North-South" traffic, that meaning traffic going from the access layers to the core layers.\\ | The traditional campus LAN design is intended for networks where there is "North-South" traffic, that meaning traffic going from the access layers to the core layers.\\ | ||
For a data center where traffic may be going from server to server, having to send data North-South begins to be inefficient as you may have to go through a core layer. Data centers may have more East-West traffic.\\ | For a data center where traffic may be going from server to server, having to send data North-South begins to be inefficient as you may have to go through a core layer. Data centers may have more East-West traffic.\\ | ||
Spine-Leaf design is better for Data Centers.\\ | Spine-Leaf design is better for Data Centers.\\ | ||
+ | \\ | ||
+ | {{:cisco:spine-leaf-16fig10_alt.jpg?400|}}\\ | ||
+ | https://www.ciscopress.com/articles/article.asp?p=2995354&seqNum=3 | ||
+ | |||
- | https://www.ciscopress.com/articles/article.asp?p=2202410&seqNum=4 \\ | ||
{{youtube>PvyEcLhmNBk?medium}} | {{youtube>PvyEcLhmNBk?medium}} | ||