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jskfanFlag for Cyprus

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how to plan for backbone Switch

If I understand L3 switches can be configured with Vlans and Vlan interfaces and IP routing.
Now if I trunk one switch to another and allow vlans from one switch to access the other switch, then connect the last switch in the chain to a Router, why would I need the backbone switch.
I know that most of companies use a backbone switch, that usually has fastest ports than the switches used to plug in workstations. but would like to know when should I use the backbone switch .

Thank you
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User generated imageLet me see if I understand how the connection is set up:

** I am assuming the Switches (where the workstations connect to) nowadays are all layer3 switches, with Vlans and interface Vlans are configured as well as IP Routing.

**You trunk each Switch to the Core Switch port ( you might etherchannel the trunk for fault talerance and more bandwidth)

***you connect the Core Switch to a Router for external connection OR to another Core Switch if you have a larger Network.

Correct ?
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By the way, is there any other configuration to do on the Core Switch to make all VLANs from other switches talk to each other.
I mean other than the Trunk ports that will be configured on the Core Switch, what else needs to be done or configured ?
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Excellent!!