interface stats

Answered Question
Mar 18th, 2009

Hi..

If we force the interface with 30 sec of interval instead of default 5 mins, will it be helpful for the traffic, it being more granular.Also, would it also help me in QOS as the packets would be tagged within 30 sec interval rather than long 5 mins.

Thanks !

I have this problem too.
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Correct Answer by Joseph W. Doherty about 7 years 8 months ago

Unclear what you consider a "better drive".

No, nothing comes to mind where changing the interface's load interval would have any impact with QoS.

There are other timers that can change how QoS behaves. Policer or shaper Tc interval comes to mind. WRED decay values also depend on time (although unclear how its parameters relate to absolute "clock" times).

QoS often most impacted by queuing methology, queue depths, and how packets dropped, that don't depend on a timer.

What do you think your issue is, or what are you trying to accomplish?

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Joseph W. Doherty Wed, 03/18/2009 - 20:01

Nothing comes to mind where changing the load interval would affect traffic, especially with QoS.

Packet tagging is per packet; shouldn't be effected by load interval.

suthomas1 Wed, 03/18/2009 - 20:23

I meant..would changing it on the interface..have a better drive on the traffic flow.

Wrt QOS, the outputs indicate the offered rate as the interval that is set.so setting it lesser..wouldnt it help in more finer match and thus better allocations?

Thanks!

Leo Laohoo Wed, 03/18/2009 - 21:42

As what Joseph said, load interval is purely for statistic and troubleshooting purposes only ... and depending on traffic load, will also affect CPU utilization.

Correct Answer
Joseph W. Doherty Thu, 03/19/2009 - 06:23

Unclear what you consider a "better drive".

No, nothing comes to mind where changing the interface's load interval would have any impact with QoS.

There are other timers that can change how QoS behaves. Policer or shaper Tc interval comes to mind. WRED decay values also depend on time (although unclear how its parameters relate to absolute "clock" times).

QoS often most impacted by queuing methology, queue depths, and how packets dropped, that don't depend on a timer.

What do you think your issue is, or what are you trying to accomplish?

suthomas1 Thu, 03/19/2009 - 21:14

Thanks!there is no issue as such. I was just trying to get clear of my doubts on whether loadinterval could have any impact on these values.

Thanks for your inputs...it got clearer for me!!!

Davy Ad Thu, 03/19/2009 - 06:38

No! It will not have a better drive on your traffic flow.

HTH

DAK

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