In looking around these forums, I found a link which has been very helpful in understanding more about QoS implementation.
Here is a quote from that document:
"Always perform QoS in hardware rather than software when a choice exists.
Cisco IOS routers perform QoS in software. This places additional demands on the CPU, depending on the complexity and functionality of the policy. Cisco Catalyst switches, on the other hand, perform QoS in dedicated hardware ASICS and as such do not tax their main CPUs to administer QoS policies. You can therefore apply complex QoS policies at Gigabit/TenGigabitEthernet line speeds in these switches."
We have 3560G switches acting as access switches and are about to buy a router. As the above quote suggests, I would like to use the switches to do the better part of the QoS processing (in hardware), but it is not clear to me that the switches support it. Could someone clarify?
Thes switches have the Standard image (c3560-ipbase-mz.122-35.SE5) which does not appear to support AutoQos Enterprise - only AutoQoS Voip. What does that imply?
-What is the best practice for implementing Q0S on this hardware, in combination with a router?
-What router should we be looking at?
-How do we implement QoS across Vlans, giving higher priority to some vlans?