[j-nsp] Juniper M-series throughput questions

[Jeffrey Welch]

I have some questions regarding how the M-series chassis throughput is
determined.  I see that the website claims 3.2 Gbps full-duplex throughput
for an M40e FPC.  Of course, that means that 4 GE modules will have
oversubscribed the slot.

Does this mean that you only have 3.2 Gbps into the chassis?  In other
words, if I'm forwarding data from one port to another on the same FPC, am
I still constrained to 3.2 Gbps?  What part of the architecture is limiting
the forwarding throughput for the FPC?

Also, how is the M40e SFM throughput calculated?  Is this simply a mutliple
of the throughput of each FPC, or actual packet throughput for the SFM?

-----------------
Jeff Welch
SIAC Advanced Communications Technology
jwelch at siac.com
212-383-2828



-----------------------------------------
This message and its attachments may contain  privileged and confidential
information.  If you are not the intended recipient(s), you are prohibited
from printing, forwarding, saving or copying this email.  If you have
received this e-mail in error, please immediately notify the sender and
delete this e-mail and its attachments from your computer.