You are awesome. Straight forward and to the point 🔥🔥🔥
@NajQazi
2 жыл бұрын
I'm glad you found this helpful ✊
@denisleonard1565
2 жыл бұрын
could you explaing more detail about the links: The link between Access switch and Distribution switch. Is it layer 2 or layer 3? The link between 2 Distribution switch. Is it layer 2 or layer 3? The link between Distribution switch and Core switch. Is it layer 2 or layer 3? The link between 2 Core switch. Is it layer 2 or layer 3?
@NajQazi
2 жыл бұрын
Good question, Denis. The most common Campus Network Design out there is Layer 2 between Access Layer & Distribution Layer. And Layer 3 between Distribution Layer & Core Layer. There are also a lot of other variations. The most common best practice design these days, is Layer 2 limited to the downlinks on the Access Layer switch connecting the endpoints. But all Layer 3 from Access Layer switch uplinks all the way through Distribution & Core. This design offers ECMP (Equal Cost Multi Path) and reduces the Layer 2 broadcast quite significantly. But this also means, you are no longer extending VLANs between switches. Hope this helps!
@denisleonard1565
2 жыл бұрын
@@NajQazi so, you mean it depends on the design that we want to implemnt, right?
@NajQazi
2 жыл бұрын
@@denisleonard1565 You got it
@joojguraa3161
2 жыл бұрын
big thanks you are easy to understand
@NajQazi
2 жыл бұрын
Music to my ears 😊
@tokoiaoben3842
Жыл бұрын
Thanks very much for this. I appreciate your time and effort. I have about 100 + end devices connected in my network. Do I really need 3 tier architecture ?. I am currently using 2960 switches with 20 Vlans configured for my entire network.
@NajQazi
Жыл бұрын
Tokoia - Great question. It depends on your overall objectives as an architect. Not all traditional networks need a full-blown 3-tier architecture. I've seen plenty of networks with a 2-tier architecture, distinct access layer, and collapsed core. Inter-VLAN routing will occur at the SVI level, while all L2 traffic within each VLAN stays local or spans across the trunk links - depending on your L2 design. Hope this helps!
@thebulletkin8393
Жыл бұрын
If this kind of structure is most beneifical for really large organisations, if I were to have a single building with a workforce of around 100 people (which is the case for my coursework task) could I do without one of the top two layers?
@NajQazi
Жыл бұрын
Two tier would work fine. Depending on the number of floors in your building and people on each floor, make sure you select the appropriate switch. You have multiple access switch options starting from an 8-port switch going up to a 48-port switch. Also pay attention to the features you need such as PoE, etc. As for distribution/core, you can easily do a collapsed core and save a ton of money. A traditional 3 tier architecture without a collapsed core is a better fit for large organizations with hundred/thousands of people. Hope this helps!
@youtubeaccountid489
2 жыл бұрын
What we do if access switch fails ? For distribution and core are two no problem i think but if access switch fail we need to replace i am right?
@NajQazi
2 жыл бұрын
You can multi-home your access devices, meaning you can have dual uplinks going from a server with each NIC (Network Interface Card) pointing to a different upstream switch at the access layer. You can also use NIC teaming on the server for traffic load balancing. Hope this helps!
@aburizatv
Жыл бұрын
bagus
@NajQazi
Жыл бұрын
I'm glad you found it helpful
@aaa-hw2ty
Ай бұрын
But it looks the same as fat tree topology
@NajQazi
Ай бұрын
The concept is consistent across both designs. You have three key layers: --> Access Layer: Connects endpoints. --> Distribution Layer: Aggregates access switches. --> Core Layer: Interconnects distribution switches, serving as the network backbone. A Fat Tree topology is optimized for data centers, emphasizing high performance and efficient load balancing. In contrast, a 3-tier campus architecture is designed for enterprise campus networks, focusing on efficiently connecting end-users and network segments. Hope this clarifies things!
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