[NSP] Maximum High Speed Interfaces on 3640

Temkin, David temkin at sig.com
Mon Feb 16 18:20:21 EST 2004

It does exactly what it says on the box.  Be lucky you get that much out
of it.  With smaller packet sizes I'm lucky to get 20-30Mbps out of it.

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Alex Foster
Sent: Monday, February 16, 2004 12:50 PM
To: cisco-nsp at puck.nether.net
Subject: [NSP] Maximum High Speed Interfaces on 3640

I know Cisco claim the maximum number of High speed interfaces supported
by the 3640 is two - but is it possible to run 4 without maxing out the
CPU.  I have tested the 3640 with 2 ATM OC3 modules and 1 FE module and
average about 60-70% util. on load.  If I introduce another FE interface
the CPU maxs out.  Are there any workarounds/configuration tricks to
overcome this - or is this a case of "it does exactly what is says on
the box".  The 3640 has 128MB memory and the iomem is set to 30/70

I am also curious to find out if anybody has overcome the limitations of
the OC3 module
and its pretty dire throughput.   I appreciate the module is not
designed to
operate at
wire speed by the most I have got out of one module is around 45 to 50
Mbps. Any tips/advise would be appreciated.  Again cisco claim you can
achieve upto 80Mbps throughput with larger packet size - excuse my
ignorance here - is this achieved by increasing the MTU on the ATM



cisco-nsp mailing list  cisco-nsp at puck.nether.net
archive at http://puck.nether.net/pipermail/cisco-nsp/

IMPORTANT: The information contained in this email and/or its attachments is confidential. If you are not the intended recipient, please notify the sender immediately by reply and immediately delete this message and all its attachments.  Any review, use, reproduction, disclosure or dissemination of this message or any attachment by an unintended recipient is strictly prohibited.  Neither this message nor any attachment is intended as or should be construed as an offer, solicitation or recommendation to buy or sell any security or other financial instrument.  Neither the sender, his or her employer nor any of their respective affiliates makes any warranties as to the completeness or accuracy of any of the information contained herein or that this message or any of its attachments is free of viruses.

More information about the cisco-nsp mailing list