What can switch cisco
that cloud switch router can not?
Well, I can play basketball, and Michael Jordan can play basketball..... does that mean we're the same?
This can work as a Layer 3 switch?
Your picture shows the blazing example of why this is NOT really a layer 3 switch.....
Here're my highlights:
Wow - I'm stunned at just how much difference this is.
Of course I'm highlighting the "worst case" packet size, but even for full 1518-byte packets, the performance is 43Gbits switched vs 279Mbits.
Note that the switch speeds shown are when using the "switch" master/slave features, which as far as switches go, they're very bare-bones and basic. (no access port security, no dhcp guard, no bpdu guard, etc....) They pretty much do VLAN tagging. As a raw switch, this is fine and dandy, but if you want any switch features, you have to use the bridging feature, which is about as slow as the routing.
A true layer 3 switch can forward IP at wire speed. Consider the old Cisco 3750 line - it doesn't have much RAM and can't handle a large routing table at all. It can speak BGP with the right firmware, but God help you if you try to put a large BGP table in its brain! It can't even run class-based weighted fair queue on the IP interfaces..... but it can forward 12Gbps of traffic without batting an eye.
My message to you is this: Don't try to get an everything-in-one-box box, because there's no such thing.
If you need a layer 3 switch - i.e. not much routing table, just blazing fast forwarding of packets at wire speed - then get an actual layer3 switch. If you need router functionality, then get a true router and plug it into a switch for breaking out vlan interfaces. (note that the switch function of CCR is perfect for this)
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