Designing a VLAN e QOS infrastructure

[scolombo]

I've been asked to design a solution for an ISP to implement a Hosting house for their customers

the design includes a cat 6513 as DataCenter switch a Cat3550 as Departimental switch. The schema is as follow.

-------- --------- 1000Fx---------

|PIX535 |--|CAT 6513|------|CAT 3550|-------------

| | |

V V V

L L L

A A A

N N N

1 2 3

As I'm not an expert of QOS the questions are:

- QOS .The internet connections come from the PIX535 side which is connected to the BACKBONE through the same 6513 . Where and how should QOS been implemented ?

- VLAN . The ISP's customers will have their traffic separate in different VLANs on the 3550. How should I configure the 6513 and 3550 to correctly forward traffic coming from internet to the different VLAN ? Should the VLAN been created at Layer 2 or Layer 3 ?

TIA

[ciscomoderator]

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If anyone else in the forum has some advice, please reply to this thread.

Thank you for posting.