Intervlan routing using SVI | CISCO Packet Tracer | Video # 28

[@jonnywoo8418]

Thank you So much Sir! You made it simple!

[@networkforyou11]

Thanks 👍

[@Dataflo]

well explained mate, thank u

[@networkforyou11]

Thanks 👍

[@AhmedazeemfarooqiSyed]

what's the need of svi (intervlan communication) when you are giving different ips subnet for each pc we can achieve communication between different networks by routing. we use vlan so that we can separate the networks by having same subnet ryt?

[@networkforyou11]

You're right that we can achieve communication between different networks through routing. However, SVIs (Switched Virtual Interfaces) and VLANs play a specific role when working within a network that uses VLANs to segment different broadcast domains within the same switch or set of switches. Here’s the breakdown: 1. Purpose of VLANs: VLANs (Virtual Local Area Networks) are primarily used to logically segment networks into separate broadcast domains within the same switch. Each VLAN typically gets a unique IP subnet, helping isolate and control traffic within that segment. VLANs do not inherently route traffic between each other because they’re isolated by design. 2. Role of SVIs (Switched Virtual Interfaces): An SVI is essentially a Layer 3 interface that represents a VLAN on a switch, enabling the switch to perform inter-VLAN routing. Each SVI gets an IP address within the VLAN’s subnet, allowing it to route traffic between VLANs without needing an external router. 3. Inter-VLAN Routing: If you want devices in different VLANs to communicate (e.g., PCs on VLAN 10 and VLAN 20), you need a routing mechanism because they are on different subnets. The SVI allows the switch to handle this routing internally by functioning as the gateway for each VLAN, reducing the need for a separate external router. 4. Alternative to External Routing: While you could route traffic between subnets with an external router, SVIs allow Layer 3-capable switches to handle this task locally, improving efficiency by reducing latency and eliminating the need for traffic to leave the switch. 5. Why Not Same Subnet Across VLANs?: Using the same subnet for different VLANs would lead to addressing conflicts and prevent proper segmentation, making it hard to control or secure traffic flows. In summary, SVIs enable inter-VLAN communication on Layer 3 switches, allowing for efficient internal routing. Without SVIs, you’d need an external router, which is less efficient. VLANs with unique subnets allow logical segmentation and control over traffic, which would be lost if they shared a subnet.

[@usmanaslam5012]

Thanku sir❤

[@networkforyou11]

👍

[@gamm0]

Can someone correct me please? This is an standart vlan routing, not SVI. Since youre not using the interfaces of the layer 3 switch, youre just creating vlans and allowing trunk in the interfaces. Wha t i am missing?

[@networkforyou11]

Hi, In this we are doing Intervlan. To make communicate between different Vlan we configure Intervlan.. Thanks

[@saurabhbhoite8775]

hello sir, can we use l2 switch instead of MSW?

[@networkforyou11]

Hi, No because. we need L3 switch do intervlan. Thanks

[@somusomasekharreddy2687]

Tqq sir

[@networkforyou11]

👍

[@jasonroy9901]

Thnx sir

[@networkforyou11]

👍

[@sss-bbb]

Perfect

[@networkforyou11]

👍

[@MichaelCook-oo8lj]

Why on earth would you give a client device an IP with a host octet set to 1 and the default gateway a value of 100? This is completely backwards.

[@networkforyou11]

Hi, That is your wish. You can give gateway as 192.168.1. 1 and give end device ip add start from 192.168.1.2 etc. You can use any way

[@MichaelCook-oo8lj]

@@networkforyou11 While you can theoretically assign any addresses you want for anything, that isn't the standard used in enterprise. The standard is to assign the default gateway the first usable address on the network.

[@rfc-793-darpa]

@@MichaelCook-oo8lj This is a lecture, stop crying about ip assignment preferences and just appreciate this beautiful material

[@MichaelCook-oo8lj]

@@rfc-793-darpa it's not a mere preference, it's a well-establishing industry practice and violating it will cause confusion.

[@tahersadeghi6773]

In the middle, you sound like whipering.

[@networkforyou11]

Hi, Ok sure we will check. Thanks