RE: Kpps vs. Bandwidth [7:76249] posted 09/26/2003
- Subject: RE: Kpps vs. Bandwidth [7:76249]
- From: "Zsombor Papp" <nobody@xxxxxxxxxxxxxx>
- Date: Fri, 26 Sep 2003 15:16:19 GMT
You have to know the average (or minimum) frame (not packet -- L2 vs L3)
DS-3 is not equivalent to 150Kpps, it was just an estimate for small IP
packets. And as a matter of fact it was probably not a very good estimate. I
was thinking about FastEthernet, where the max is about 148Kpps one way, and
I thought the DS-3 being 90Mbps total would be close. On a second thought
however, the encapsulation on serial lines is probably a lot more efficient
than on Ethernet (due to the interframe gap and that ungodly long preamble),
so a maxed out DS-3, depending on encapsulation, might be significantly
higher than 150Kpps. For example, an OC3 POS line can do 353Kpps in one
direction, which is more than twice of the FE rate even though the bps
number is just 1.5 times higher (100Mbps vs. 155Mbps).
Evan You wrote:
> I know how many packets per second that each router can handle.
> How do you
> convert that to how much bandwidth that a router can handle.
> For example, I
> have a 2622 that is running at full E1/1984K (average is 80%
> utilization and
> it peaks often) and the CPU is at 25% to 30%. I know that this
> router can
> handle 15Kpps. So how does Kpps translate to bandwidth? I read
> in another
> thread that a DS-3 is equivalent to 150Kpps.
> Thanks and Regards,
> E v a n E. Y o u
> CCNP - CCDP
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