Excessive IP throughput

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Mar 25^th, 2011 at 8:33pm

I have a small iDirect Infinity Downstream at 1.5Mbps 0.793r QPSK carrier. On both iMonitor, and from Cisco "show interface" I am seeing consistenly over 2200 kbps usage with peaks to 2400 kbps total usage for the Network IP TRAFFIC GRAPH, even at interval set to minutes.
Is this true data over the satellite or does it show what is coming into the PP, before it drops what it can not send?

Even when I look at IP usage for a remote, I see the total exceed 1544 kbps!

Has anyone else seen this?

Mar 26^th, 2011 at 1:29am

Seems a bit excessive...even with satellite overhead.

What are the configured spec's for your carrier in iBuiilder (trans, info, and symbol rates)?

Mar 28^th, 2011 at 2:27pm

Info Rate: 1544 kbps, FEC: TPC-3249/4096, Transmission Rate: 1946.514, and Symbol rate 973.257 ksym.
I can email you screen snapshots if you give me your address. I would have attach the pics to this thread if I new how.
Thanks

Mar 30^th, 2011 at 2:27am

What iDS/iDX version are you using? There were overrun bugs noted in some of the later iDS versions.

Mar 30^th, 2011 at 2:03pm

Present version is 8.3.12.1
I tried to email you screen captures, but got a failure "Unknown user: TDMAMike1@gmail.com".
Thanks

Apr 2^nd, 2011 at 2:50pm

You should not be seeing over-runs using that iDS version. I would recommend that you take your issue to the TAC in an effort to isolate the problem. There may be a reason for it, or the bug fix is not as good as they think it is.

Apr 4^th, 2011 at 9:20pm

Thanks for trying to help. I will work with TAC and eventually post the solution.

Apr 5^th, 2011 at 2:32pm

Here is the info provided by iDirect HelpDesk:
"I spoke to one of our leads and found out that this is not a bug in the system. On the Downstream you can see IP traffic that exceeds your downstream, because the system doesn't care how much is coming from the "outside", it gets throttled back and cannot actually go above your link capacity. What will give you a better idea of your actual usage is the satellite traffic stats. This will tell you exactly how much of your link is being used, versus what someone wants or tries to send downstream."

I hope it helps others as well.

Apr 5^th, 2011 at 10:00pm

to avoid this we normally apply traffic shaping on hub cisco routers.

Email me:eric@satsig.net

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