Hello Bob,
Thanks for the pros and cons data which is very useful for us to analyse and
make the best decision of our test equipment choice.
I had a chat with one of the switch vendor and his comment was also as unsure
about the CPU capability even if forwarding are done with latest Broadcom
Tridant or Tomahawk chip and they are planning to investigate this for us.
As described in my previous mail about the application, we want to
simultaneously send 10G IP traffic and monitor the flow/any errored
frames/drops/packet sequences/Jitter or Latency/throughput/QoS behaviour etc
and with bi-directional flow for 48 pairs.
Are you aware of any user application similar to our plan and does it really
work when using such tools, compared to dedicated test equipment?
Regards,
Joydev
From: Bob McMahon [mailto:bob.mcma...@broadcom.com]
Sent: 19 June 2017 20:34
To: Jana, Joydev
Cc: iperf-users@lists.sourceforge.net
Subject: Re: [Iperf-users] Iperf usage in Telecom network testing
Hi Joydev,
Yes, the number of physical ports is limited by the hardware/host. The number
of iperf flows is not, i.e. a single host can have multiple iperf streams.
As standard testing there are no switches which iperf is compiled for. One
would have to talk with the switch vendor to have them supply iperf for their
switch. I also would be a bit wary about this because switches tend to have
less substantial CPUs than let's say an Intel server. So, while it's ability
to switch traffic is high performance, the ability to source and sink traffic
may not be.
Another option is to use vlans on the host with the NIC connected to a vlan
capable switch as the mux and demux. Connect a quality server to the switch
over a trunk port. Maybe use a 10G NIC port to a switch with ten 1G ports.
For many of my setups I use the Intel quad port server
adapter<https://www.intel.com/content/www/us/en/ethernet-products/gigabit-server-adapters/overview.html>
to get multiple NICs. Also, you may need to install some policy routes when
sourcing traffic out of the same host with multiple NIC ports. This allows one
to have an iperf flow use a particular NIC port.
Bob
On Sun, Jun 18, 2017 at 10:46 PM, Jana, Joydev
<joydev.j...@coriant.com<mailto:joydev.j...@coriant.com>> wrote:
Hello,
We are investigating the possibility to use any open source IP traffic
generator/Analyser app that can be installed in any device to be able to verify
error free flow.
Reading through the documentation of Iperf, this tool is possible to do so when
installed into Client/server setup which can be Windows or Linux based Machine.
This means the physical ports that can be used from the Linus Machine are
connected to the DUT/Network under test.
This also means that number of ports available from the Generator/Analyser are
guided by number of NIC ports available.
Is this correct understanding?
This leads to another question:
Can Iperf be installed into Switches which has say 50 to 100 ports available
and each can be used as a Generator/Analyser port?
If so, do you have any recommendation to type of switch in use by already users
who are using Iperf in such application requiring say 50 ports used
simultaneously to generate and analyse IP traffic packets.
Thanks,
Joydev Jana
Coriant Oy
Sinimaentie 6
02630 Finland
+358 40 757 4862<tel:+358%2040%207574862>
joydev.j...@coriant.com<mailto:joydev.j...@coriant.com>
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