[c-nsp] 877 Throughput and others

[Skeeve Stevens]

I'm a little confused about the throughput of Cisco devices.

The portable product sheet lists the 870 series as Fast/CEF switching as
12.80 Mbps maximum theoretical throughput.

Does this mean an 877 with a ADSL2 service trained up at 20-24Mbps will
never actually be able to attain those speeds?

2nd, but related query:

The 1811 says that it has a maximum of 35.84Mbps throughput.

Does this mean 2 PC's on FE0 and FE1, the real layer 3 ports, can only talk
at a maximum of 35Mbps?

And take say a 7200G1 which says 521Mbps..  Does this mean between two of
its 1GB interfaces, it can't get anywhere near 1GB?


3rd query

How much would NAT (if any) slow down the throughput?  What happens on a 870
with 12, a 1811 with 35 and a 7200-G1 with 512Mbps?

4th query

Is there a list perhaps of what is Process Switched, what is Fast/CEF
switched and so on?

There might even be a document somewhere which explains all this, but my
google/cisco.com foo is not strong enough to find it.


--
Skeeve Stevens, RHCE
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