Velocity Reviews > input rate

# input rate

Iggy
Guest
Posts: n/a

 05-24-2005
Is it '5 minute input rate' value from the show int output equal to the
actual traffic (in last 5 minutes) rate that arrives on some interface? I
have contracted traffic rates with my both ISP's and show int always
indicates that the rate is for about 200 Kbps less then the contracted CIR
value should be when I load Internet links to the max. so now I'm wondering
if I'm maybe reading those values wrongly or both ISP's are breaking LSA.

Best Regards,
Igor

Walter Roberson
Guest
Posts: n/a

 05-24-2005
In article <d6vl3r\$loq\$(E-Mail Removed)>, Iggy <(E-Mail Removed)> wrote:
:Is it '5 minute input rate' value from the show int output equal to the
:actual traffic (in last 5 minutes) rate that arrives on some interface?

If I recall correctly, it is a weighted average rather than a
literal count.

:I have contracted traffic rates with my both ISP's and show int always
:indicates that the rate is for about 200 Kbps less then the contracted CIR
:value should be when I load Internet links to the max. so now I'm wondering
:if I'm maybe reading those values wrongly or both ISP's are breaking LSA.

What percentage loss is that 200 Kbps ?
--
Oh, to be a Blobel!

Guest
Posts: n/a

 05-24-2005
It is indeed an average

--
2nd Law of Thermodynamics: Chaos will Reign.

///////////////////
--Anthrax--
//////////////////
"Walter Roberson" <(E-Mail Removed)-cnrc.gc.ca> wrote in message
news:d6vmos\$46\$(E-Mail Removed)...
> In article <d6vl3r\$loq\$(E-Mail Removed)>, Iggy <(E-Mail Removed)> wrote:
> :Is it '5 minute input rate' value from the show int output equal to the
> :actual traffic (in last 5 minutes) rate that arrives on some interface?
>
> If I recall correctly, it is a weighted average rather than a
> literal count.
>
>
> :I have contracted traffic rates with my both ISP's and show int always
> :indicates that the rate is for about 200 Kbps less then the contracted
> CIR
> :value should be when I load Internet links to the max. so now I'm
> wondering
> :if I'm maybe reading those values wrongly or both ISP's are breaking
> LSA.
>
> What percentage loss is that 200 Kbps ?
> --
> Oh, to be a Blobel!

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Hansang Bae
Guest
Posts: n/a

 05-25-2005
<Anthrax> wrote:

> It is indeed an average

Weighted average. It's weighted to limit the peaks and valleys from
affecting the numbers too much.

--

hsb

"Somehow I imagined this experience would be more rewarding" Calvin
Due to the volume of email that I receive, I may not not be able to
************************************************** ******************

Iggy
Guest
Posts: n/a

 05-25-2005
So, how then can you measure/calculate actual transfer rate? I use MRTG and
max. value it shows is same as in 'show int' command output...Also, on LAN
side I have configured traffic shaping which should shape inbound traffic
from the Internet. Shape value is set to 1900000 bps, contracted CIR with
ISP is 2000000 bps and while the link should be under heavy load there is
only few packets holded in the queue by traffic shaper. When I set lower
shaping value (1700 Kbps), shaping is active almost constantly...

B.R.
Igor
"Iggy" <(E-Mail Removed)> wrote in message
news:d6vl3r\$loq\$(E-Mail Removed)...
> Is it '5 minute input rate' value from the show int output equal to the
> actual traffic (in last 5 minutes) rate that arrives on some interface? I
> have contracted traffic rates with my both ISP's and show int always
> indicates that the rate is for about 200 Kbps less then the contracted CIR
> value should be when I load Internet links to the max. so now I'm
> wondering if I'm maybe reading those values wrongly or both ISP's are
> breaking LSA.
>
> Best Regards,
> Igor
>
>
>

Guest
Posts: n/a

 05-25-2005
Hello,

Personally I found MRTG as the most useful tool to measure the load
(since MIB are constantly updated and keep historical record). Just to wide
a little bit more in your previous query ....

"Average number of bits and packets transmitted per second in the last 5
minutes. If the interface is not in promiscuous mode, it senses network
traffic that it sends and receives (rather than all network traffic).
The 5-minute input and output rates should be used only as an approximation
of traffic per second during a given 5-minute period. These rates are
exponentially weighted averages with a time constant of 5 minutes. A period
of four time constants must pass before the average will be within 2 percent
of the instantaneous rate of a uniform stream of traffic over that period.

Note The 5-minute period referenced in this output is a load interval that
is configurable under the interface. The default value is
5 minutes. "

http://www.cisco.com/en/US/products/...html#wp1223732

About the traffic shaping issue, if you configured traffic shaping becn
makes sense that the queue will not hold packets unless you receive becn's .

http://www.cisco.com/en/US/tech/tk71...0942f8.shtml#h

what shows up in the show frame-relay pvc and show traffic-shape statistics

--
2nd Law of Thermodynamics: Chaos will Reign.

///////////////////
--Anthrax--
//////////////////
"Iggy" <(E-Mail Removed)> wrote in message
news:d72074\$sep\$(E-Mail Removed)...
> So, how then can you measure/calculate actual transfer rate? I use MRTG
> and
> max. value it shows is same as in 'show int' command output...Also, on LAN
> side I have configured traffic shaping which should shape inbound traffic
> from the Internet. Shape value is set to 1900000 bps, contracted CIR with
> ISP is 2000000 bps and while the link should be under heavy load there is
> only few packets holded in the queue by traffic shaper. When I set lower
> shaping value (1700 Kbps), shaping is active almost constantly...
>
> B.R.
> Igor
> "Iggy" <(E-Mail Removed)> wrote in message
> news:d6vl3r\$loq\$(E-Mail Removed)...
>> Is it '5 minute input rate' value from the show int output equal to the
>> actual traffic (in last 5 minutes) rate that arrives on some interface? I
>> have contracted traffic rates with my both ISP's and show int always
>> indicates that the rate is for about 200 Kbps less then the contracted
>> CIR
>> value should be when I load Internet links to the max. so now I'm
>> wondering if I'm maybe reading those values wrongly or both ISP's are
>> breaking LSA.
>>
>> Best Regards,
>> Igor
>>
>>
>>

>
>

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Iggy
Guest
Posts: n/a

 05-25-2005
Thanks for explanation about measuring traffic rate... I remembered that I
saw it somewhere, but it was disapeared from my "bio flash memory"

Regarding shaping you did'nt understood me well, I'm not using FR traffic
shaping, but CBTS and this is configured on LAN side since on this way I'm
able to use CBWFW on FE interface for 2 mbps Internet traffic since I
first shape traffic for a little bit lower then actual CIR (if CIR is 2
mbps, then I shape it on 1.9 Mbps) and then simply nest CBWFQ inside traffic
shaping. Without traffic shaping queue will always fill up on ISP side. With
shaping, queue fills on my router (interface trough which Internet traffic
flows outbound into my LAN) and I'm able to give some more priority to
certain Internet applications... And it really works

B.R.
Igor

<Anthrax> wrote in message news:4294960b\$(E-Mail Removed)...
> Hello,
>
>
> Personally I found MRTG as the most useful tool to measure the load
> (since MIB are constantly updated and keep historical record). Just to
> wide a little bit more in your previous query ....
>
> "Average number of bits and packets transmitted per second in the last 5
> minutes. If the interface is not in promiscuous mode, it senses network
> traffic that it sends and receives (rather than all network traffic).
> The 5-minute input and output rates should be used only as an
> approximation of traffic per second during a given 5-minute period. These
> rates are exponentially weighted averages with a time constant of 5
> minutes. A period of four time constants must pass before the average will
> be within 2 percent of the instantaneous rate of a uniform stream of
> traffic over that period.
>
> Note The 5-minute period referenced in this output is a load interval that
> is configurable under the interface. The default value is
> 5 minutes. "
>
> http://www.cisco.com/en/US/products/...html#wp1223732
>
> About the traffic shaping issue, if you configured traffic shaping becn
> makes sense that the queue will not hold packets unless you receive becn's
> .
>
> http://www.cisco.com/en/US/tech/tk71...0942f8.shtml#h
>
> what shows up in the show frame-relay pvc and show traffic-shape
> statistics when is under heavy load?
>
>
>
>
> --
> 2nd Law of Thermodynamics: Chaos will Reign.
>
> ///////////////////
> --Anthrax--
> //////////////////
> "Iggy" <(E-Mail Removed)> wrote in message
> news:d72074\$sep\$(E-Mail Removed)...
>> So, how then can you measure/calculate actual transfer rate? I use MRTG
>> and
>> max. value it shows is same as in 'show int' command output...Also, on
>> LAN
>> side I have configured traffic shaping which should shape inbound traffic
>> from the Internet. Shape value is set to 1900000 bps, contracted CIR with
>> ISP is 2000000 bps and while the link should be under heavy load there is
>> only few packets holded in the queue by traffic shaper. When I set lower
>> shaping value (1700 Kbps), shaping is active almost constantly...
>>
>> B.R.
>> Igor
>> "Iggy" <(E-Mail Removed)> wrote in message
>> news:d6vl3r\$loq\$(E-Mail Removed)...
>>> Is it '5 minute input rate' value from the show int output equal to the
>>> actual traffic (in last 5 minutes) rate that arrives on some interface?
>>> I
>>> have contracted traffic rates with my both ISP's and show int always
>>> indicates that the rate is for about 200 Kbps less then the contracted
>>> CIR
>>> value should be when I load Internet links to the max. so now I'm
>>> wondering if I'm maybe reading those values wrongly or both ISP's are
>>> breaking LSA.
>>>
>>> Best Regards,
>>> Igor
>>>
>>>
>>>

>>
>>

>
>
>

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