Calculating Bandwidth

How to calculate total bandwidth utilization of a circuit if i have In and Out data rate? Is there any formula?

Um, monitoring the circuit using MRTG or something similar would be a good way of doing this. To work out the average utilization, you could do the following: Average_Input=Total_Input (in BITS)/ Time (in SEC), Avg_Out=Total_Out (BITS) / Time (sec)
Eg:
Last clearing of "show interface" counters 11w3d
Input queue: 0/75/0 (size/max/drops); Total output drops: 2051
Queueing strategy: weighted fair
Output queue: 0/1000/64/2046 (size/max total/threshold/drops)
Conversations 0/81/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
30 second input rate 33000 bits/sec, 3 packets/sec
30 second output rate 7000 bits/sec, 2 packets/sec
53836304 packets input, 2893045321 bytes, 0 no buffer
Received 0 broadcasts, 1384 runts, 3 giants, 0 throttles
1424 input errors, 2 CRC, 0 frame, 0 overrun, 0 ignored, 16 abort
58226253 packets output, 1732843968 bytes, 0 underruns
Avg_Input=2893045321bytes / 11w3d
Avg_Input=23144362568bits / 80days so
Avg_Inout=23144362568bits / 6912000seconds... Therefore
Avg_Input=3348 bits-per-second (bps) (Hehe, this is on a T3, the customer is paying us for a T3 for an average of 3.3kbps!)
This is purely an average. They could have been idle for 11w2day and then apssed all of the traffic in the last day. Without historical data there is not way of knowing...

Similar Messages

Calculating Bandwidth... - easy question

I need to calculate bandwitdh to figure out what kind of connection i need. I know if i take ONE single computer with wireshark loaded then run the programs then stop the capture.....How long do i need to capture it for? 1 minute, or 10 minutes, or ? Then once i capture the data, what do i do with it?
Help!
Thank you

I need to calculate bandwitdh to
figure out what kind of connection i need. I know if i take ONE single
computer with wireshark loaded then run the programs then stop the
capture.....How long do i need to capture it for? 1 minute, or 10
minutes, or ? Then once i capture the data, what do i do with it?Help!Thank you
Hi,
By capturing packets it wont help to calculate the bandwidth requirement genral practices and approach is you need to consider the concurrency usage ratio from single PC based on which you can determine the bandwidth to be subscribed from your service provider.You also need to check out whether upload or the download traffic.
Best practice also would be to subscribe for lesser bandwidth for short duration and observe the peak/average usage on the links and based on that you can decide the actual bandwidth requirement for your facility.
Hope to Help !!
Remember to rate the helpful post
Ganesh.H

Calculating bandwidth costs??

Id like to calculate the per transaction costs of my app
its pretty much a timer that goes off every 3.5 secs, connects to some server, downloads a chunk of data for processing..it isnt exactly streamed...
heres the code
myURL = new URL (someAddy);
myURLConnection = (HttpURLConnection)myURL.openConnection();
myURLConnection.setRequestMethod("POST");
myURLConnection.setDoOutput(true);
BufferedReader input = new BufferedReader(new InputStreamReader(myURLConnection.getInputStream()));
while (null != (str = input.readLine())) {
processString = processString + str + "\n";
input.close();so im guessing "input" is the chunk of data that is retrieved every 3.5 secs..how can i determine the size of it?
byte[] bytes = input.toString().getBytes();
int total = 0;
for(int i=0; i<bytes.length; i++){
total += bytes;
System.out.println("Size at: " + i + " " + bytes[i] + " total: " + total);
heres the typical output of this: Size at: 29 54 total: 2656
so it looks like at element 29 of the byte[], totals 54 bytes, but the accumlation of elements 0-29 is 2,656 bytes?
of course this probably doesnt input packet headers, check sums and all that
anyone know of a better more accurate way of doing this?
i tried using network monitoring software "NetLimiter" which gives me the average downloaded # of Bytes...but my boss wants a "per transaction number"
shrug
thanks for the help

Won't the exact number vary based on the contents of the request and the reply.
The only reliable way to detremine the number and size of the packets is to use a network sniff. You boss may decide she doesn't need to know the exact number that much.

Dynamic Buffering Based on Bandwidth and Datarate

I'm trying to determine an initial value for NetStream.bufferTime based on the client's calculated bandwidth and the video's bitrate.
As far as I can tell you can't do this, because you must have an initial buffer set BEFORE you call NetStream.play() (or use the default 2 seconds) and FMS does not call NetStream.onMetaData, where one would normally find the videodatarate, until after NetStream.play() is called.
Even if you modify NetStream.bufferTime during the onMetaData call back it doesn't effect when the video starts playing or when the NetStatus event registers "NetStatus.Buffer.Full".
Therefore my question is:
How do I find the Video Data Rate BEFORE I call NetStream.play?
-Or-
How do how do I reset the initial bufferTime before acctual play back begins and the NetStatus event fires with "NetStatus.Buffer.Full"

I think you are right. Without playing the stream you cant decide it datarate.

Ipad mirroring or streaming for quality

I now have two ways of streaming music and movies from my ipad and i phone.to my speakers and tv.
Both use appletv.
One is to connect using airplay and the other is to use mirroring.
Is there any difference in the quality of media when these methods are compared?
Thanks

On Thu, 17 Apr 2008 13:40:41 +0000 (UTC), "foxteeth"
<[email protected]> wrote:
>progressive will basically push the video immediately to
>the client regardless of speed and may or may not have to
buffer
Video buffering can be adjusted at client side within your
SWF file,
which plays FLV.
>Streaming on the other hand will calculate
>the speed at which the visitor is trying to
>connect
It is easy to do the same using special bandwidthmeter. I saw
several
such SWF-based tricks, which all loads a file of known size
and
measure downloading time. Then you can switch between
different video
sources depending on the the calculated bandwidth value.
>and serve up different quality (size) videos
>depending on client connection.
And this is also doable by simple PHP script, delivering
video file to
your client. Just create a file reading cycle with short
pauses within
it, defined by the average delivery bandwidth preset value. I
use such
method and it works really good for a more or less stable
cable
channels. The only disadvantage relatively to true streaming
is that
such method works not so good with VBR streams. Because it
has no
information about real bitrate of each portion delivered.
Therefore
you need to add some extra bandwidth portion for some
unpredictable
delivery issues. E.g. if your video has 256 kbps and your
audio has 64
kbps it doesn't mean that your total bandwidth preset value
should be
320 kbps. It should be done a bit greater, for example 350 to
380
kbps. That will work for any case.

Snmp and ifspeed

I am confused about the value that is returned in a snmp query to the 4250-sx for the interface speed. Could you please help me to understand? When I query the ids 5.1 x sensor with snmpwalk, it returns with a value of 10000000 which = 10 Mbps
root:~# snmpwalk -v2c -c community sensor ifSpeed
IF-MIB::ifSpeed.1 = Gauge32: 10000000
IF-MIB::ifSpeed.2 = Gauge32: 10000000
IF-MIB::ifSpeed.3 = Gauge32: 10000000
IF-MIB::ifSpeed.4 = Gauge32: 10000000
This is incorrect as the device has gigabit interfaces installed. It is my understanding that some network monitoring programs use this value when calculating bandwidth used.
Why does the interface return the incorrect value?

I have confirmed that the snmp on Firmware v1.0.3.09 doesn't report ifSpeed properly and always reports the same results regardless of port configuration. This has been reported to Linksys engineering.
For testing I used snmpwalk on a Debian Linux system:
snmp list interfaces:
root@McDev1:~# snmpwalk -Os -c public -v 2c 192.168.1.1 1.3.6.1.2.1.2.2.1.2
iso.3.6.1.2.1.2.2.1.2.1 = STRING: "lo"
iso.3.6.1.2.1.2.2.1.2.2 = STRING: "ifb0"
iso.3.6.1.2.1.2.2.1.2.3 = STRING: "ifb1"
iso.3.6.1.2.1.2.2.1.2.4 = STRING: "teql0"
iso.3.6.1.2.1.2.2.1.2.5 = STRING: "sit0"
iso.3.6.1.2.1.2.2.1.2.6 = STRING: "ip6tnl0"
iso.3.6.1.2.1.2.2.1.2.7 = STRING: "eth0"
iso.3.6.1.2.1.2.2.1.2.8 = STRING: "eth1"
iso.3.6.1.2.1.2.2.1.2.9 = STRING: "eth2"
snmp list interfaces speeds:
root@McDev1:~# snmpwalk -Os -c public -v 2c 192.168.1.1 1.3.6.1.2.1.2.2.1.5
iso.3.6.1.2.1.2.2.1.5.1 = Gauge32: 10000000
iso.3.6.1.2.1.2.2.1.5.2 = Gauge32: 10000000
iso.3.6.1.2.1.2.2.1.5.3 = Gauge32: 10000000
iso.3.6.1.2.1.2.2.1.5.4 = Gauge32: 0
iso.3.6.1.2.1.2.2.1.5.5 = Gauge32: 0
iso.3.6.1.2.1.2.2.1.5.6 = Gauge32: 0
iso.3.6.1.2.1.2.2.1.5.7 = Gauge32: 1000000000
iso.3.6.1.2.1.2.2.1.5.8 = Gauge32: 1000000000
iso.3.6.1.2.1.2.2.1.5.9 = Gauge32: 10000000
Please remember to Kudo those that help you.
Linksys
Communities Technical Support

Bandwidth Calculation based on Network IP Address on SNMP Cisco 3750

Dear All,
Instead of getting bandwidth calculation on cisco switch via snmp for total in and out or based on port, is it possible to get the calculation of bandwidth for in and out for the C Class IP on the network ? That mean i can get the calculation for each of my network IP address from the Cisco, what i'm doing now is to get from my bridge server and i run the iptables and some bash script and also MRTG
Please advice. TQ

Hi Abhi,
you're welcome. Thanks for rating & marking as answered!
I have CISCO 6503 box also with me. Could you please confirm if feature would be supported on 6503 ethernet ports or not?
Have a look at the Release Notes:
http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SXF/native/release/notes/features.html#wp2800031
"New Software Features in Release 12.2(18)SXF2
Support with Supervisor Engine 2 for these features, which are already supported with other Supervisor Engines:
- IP unnumbered for VLAN-SVI interfaces
-VLANs over IP unnumbered sub-interfaces"
I have to say I've never done this so far on a c6500 but I think you can rely on the RN.
HTH
Rolf

MQC Bandwidth Percenage Calculation

Hello Guys,
I want to setup qos bandwidth policing&priority. I want to allocate 50% of my Internet link bandwidth to the PRIORITY-QUEUE, and 50% of the bandwith for other Web-traffic and default-traffic.
My question is: while i configure and give 50% bandwidth for priority-queue, is that 50% calculated from the Fasthethet Interface bandwidth or it is automatically calculated from my Internet-Bandwidth and allocates 50% from that bandwidth space.
To make it clear : lets say a Fastethernet-Interface speed/bandwidth is bydefault 100-Mbps. and lets say my Interface bandwidth which i have taken from ISP is 512-kbps. so when i start to do bandwidth alllocation , and give 50% of interface bandwidth to priority-queue and 50% for other traffic. how the allocation is calculated.....????
please instruct

Hi,
Please check whether WT /102 is available or not in the input table
Also you used which function to write PCR? ACTIO or something else??
Regards,
Uday

ASA5510 VPN Bandwidth Calculations

Were running an ASA5510 with multiple IPSEC VPN clients over a 100Mb leased line. At the moment we have about 10 active clients however we are looking at gearing up to about 100 clients.
Question is, is there a known method for calculating the required bandwidth for this number of clients or indeed obtaining metrics from already connected clients to help with this calculation.
We have tried a few monitoring products, most notably Solarwinds, however none of the products we have tried seems to be able to give us the throughput of the individual VPN connections to assist with our calcs....

Hi Rob,
Check out VPNTTG (VPN Tunnel Traffic Grapher) is a software for SNMP monitoring and measuring the traffic load for IPsec (Site-to-Site, Remote Access) and SSL (With Client, Clientless) VPN tunnels on a Cisco ASA. It allows the user to see traffic load on a VPN tunnel over time in graphical form.
Advantage of VPNTTG over other SNMP based monitoring software's is following: Other (commonly used) software's are working with static OID numbers, i.e. whenever tunnel disconnects and reconnects, it gets assigned a new OID number. This means that the historical data, gathered on the connection, is lost each time. However, VPNTTG works with VPN peer's IP address and it stores for each VPN tunnel historical monitoring data into the Database.
For more information about VPNTTG please visit www.vpnttg.com

DMS server sizing calculation

HI Gurus,
My client has given that Finance department is generating documents around 20 GB per month (includes all types of format) now i have to create the Server sizing for this 20 GB kindly help on how to proceed. Is there is any standard calculation for this.
Regards
Kannan

Recommended approach for managing Finance documents is SAP Archivelink solution(refer previous posts in forum).
Content server sizing is a separate exercise that you need to carry out in conjunction with your Basis team and the customer. Capture details along parameters like Office/Plant from where docs would be accessed, the available network bandwidth,number of users,number of transactions per day,maximum size of a single file,number of documents generated/day that would be uploaded and the growth plan for the next 3 years.Once done,the Basis team will provide you with details like CPU,RAM,OS,bandwidth and hard disk space that would be needed from which the cost can be calculated.
Regards,
Pradeepkumar Haragoldavar

What should be the quality of video and audio for bandwidth 768KB

Hello Friends
We are provoding 768kB bandwidth for our connection. Can any body tell us what should be the quality of video and audio we can set that does not effect frame rate which is 24 FPS.
thanks in advance.

Hi Samir
You could try out the bitrate calculator at http://www.adobe.com/devnet/flash/apps/flv_bitrate_calculator/ . It lets you try various encoding settings to see what fits best for the bandwidth available to you.
Regards
Mamata

How to calculate network bandwidth for dataguard 11.2

Hi all,
have a customer who needs to setup a new data guard environment in release 11.2.0.2. Primary site will be in Italy, standby site will be in New York.
He would like to know the network bandwidth between primary and standby site needed to obtain the maximum performance in redo transport with or without compression option.
I found a lot of threads and docs indicating some formulas but none of them explained how to:
- calculate network bandwidth on a rac system (having a single instance standby database)
- calculate network bandwidth in case of use redo transport compression
- calculate cpu consumption if using redo transport compression
Could you please give any advice?
A.M.

Hi,
customer made ma a lot of technical question just like the following:
- which are the main factors determining the 30% overhead indicated in the network bandwidth calculation
Required bandwidth = ((Redo rate bytes per sec. / 0.7) * 8) / 1,000,000 = bandwidth in Mbps
- how much bandwidth will I gain if I apply redo transport compression and why redo transport compression and why usually the gzip utility gives me 5X less and oracle compression gives me a maximum of 50-60% of compression even if it uses the same engine of zlib compression as indicated below?
Data Guard redo transport compression uses the same zlib compression engine at level 1 as gzip -1. To estimate the compression ratio you can achieve using Data Guard redo transport compression, first compress an archived redo log file with gzip:
$ gzip -1 <archive redo logfile>.arc
Then use the gzip --list option to explicitly display the compression ratio:
$ gzip --list <archive redo logfile.arc>.gz
Note: Use gzip version 1.3.3 or later. Refer to www.gzip.org for the latest information on gzip.
Could anyone give me any direction?
Thank you
AM

How to monitor bandwidth on Catalyst via SNMP?

I've got c3750g with 12.2(55)SE.
When I try ifSpeed (1.3.6.1.2.1.2.2.1.5), i've got 1 peak 999999999 and then only 0. Polling is 1 second.
When I try ifHighSpeed (1.3.6.1.2.1.31.1.1.1.15), I've 0 also.
When I try ifInOctets from snmp-v2 MIB (1.3.6.1.2.1.2.2.1.10), I've got results, but since it summary - my software cannot do calculations and I cant get instant interface bandwidth.
Is there any solutions for catalyst?

Hi,
Are you saying ifSpeed. is changing value from one poll to the next? What kind of interface is it? Sounds like a bug, or an error in polling. Please post the snmpwalk of ifDescr, ifType, and ifSpeed.
For the ifHighSpeed issue, from the IF-MIB entry about that object: "For a sub-layer which has no concept of bandwidth, this object should be zero." Are you polling ifHighSpeed on a sub-layer interface?
Bandwidth utilization is always calculated by taking multiple readings of in or out counters. There will not be a separate counter kept in our snmp agent, when separate values already exist and can be calculated. Thus, since you can use ifSpeed and poll ifInOctets to get the delta, and then calculate the result, our snmp agent will not contain the utilization number.
If you want a graph of bandwidth utilization over time, I would suggest obtaining MRTG. It is available free of charge over the web, just search for MRTG download.
Hope that helps,
Curtis

IOS-G2, ASR1K how shaper is calculated

Hi together out there,
I am doing a little bit troubleshooting with QOS and shaping.
It s always a little bit difficult to find out how our Provider is calculating the BW they are offering to us and how we are calculating our shaping target rate.
Normally we are using config like following.
Now the question is what is used for calculating the shaping-rate:
Is it the whole packet including L2-Header
Is it just the packet with L3-Header and GETVPN-Header, without L2-Header
Is it just the packet only with original L3 Header
This Info is important so we can shape to the correct BW we agreed with ISP
Thanks in Advance
Hubert
policy-map xQOS-QUEUE-POLICY
class xQOS-CLASS-EF_Realtime_Voice
    priority percent 20
class xQOS-CLASS-CS6_Network_Control
    bandwidth remaining percent 5
class xQOS-CLASS-CS5
class xQOS-CLASS-AF41
    bandwidth remaining percent 10
class xQOS-CLASS-CS4_Realtime_Video
    bandwidth remaining percent 35
    queue-limit 256 packets
class xQOS-CLASS-AF31_Video_Streaming
    bandwidth remaining percent 8
class xQOS-CLASS-CS3_Realtime_Signalling
    bandwidth remaining percent 3
class xQOS-CLASS-AF21_Transactional_Data
    bandwidth remaining percent 10
class xQOS-CLASS-CS2_Management_OAM
    bandwidth remaining percent 3
class xQOS-CLASS-AF11_Bulk_Data
    bandwidth remaining percent 5
    queue-limit 512 packets
class xQOS-CLASS-CS1_Scavanger_Data
    bandwidth remaining percent 1
class xQOS-CLASS-BE_Best_Effort
    bandwidth remaining percent 15
    queue-limit 128 packets
policy-map xQOS-SHAPED-10000-QUEUE-POLICY
class class-default
    shape average 10000000 100000 0
service-policy xQOS-QUEUE-POLICY
interface GigabitEthernet0/3
description Provider Etherlink
bandwidth 100000
no ip address
load-interval 30
duplex full
speed 100
media-type rj45
no shut
interface GigabitEthernet0/3.1111
description 10Mbit/s-EthMP to Branch
bandwidth 10000
encapsulation dot1Q 1111
ip address 10.200.111.1 255.255.255.252
ip tcp adjust-mss 1320
ip ospf network point-to-point
bfd interval 200 min_rx 200 multiplier 3
crypto map MAP-SECURE-WAN
service-policy output xQOS-SHAPED-10000-QUEUE-POLICY

Hi together out there,
I am doing a little bit troubleshooting with QOS and shaping.
It s always a little bit difficult to find out how our Provider is calculating the BW they are offering to us and how we are calculating our shaping target rate.
Normally we are using config like following.
Now the question is what is used for calculating the shaping-rate:
Is it the whole packet including L2-Header
Is it just the packet with L3-Header and GETVPN-Header, without L2-Header
Is it just the packet only with original L3 Header
This Info is important so we can shape to the correct BW we agreed with ISP
Thanks in Advance
Hubert
policy-map xQOS-QUEUE-POLICY
class xQOS-CLASS-EF_Realtime_Voice
    priority percent 20
class xQOS-CLASS-CS6_Network_Control
    bandwidth remaining percent 5
class xQOS-CLASS-CS5
class xQOS-CLASS-AF41
    bandwidth remaining percent 10
class xQOS-CLASS-CS4_Realtime_Video
    bandwidth remaining percent 35
    queue-limit 256 packets
class xQOS-CLASS-AF31_Video_Streaming
    bandwidth remaining percent 8
class xQOS-CLASS-CS3_Realtime_Signalling
    bandwidth remaining percent 3
class xQOS-CLASS-AF21_Transactional_Data
    bandwidth remaining percent 10
class xQOS-CLASS-CS2_Management_OAM
    bandwidth remaining percent 3
class xQOS-CLASS-AF11_Bulk_Data
    bandwidth remaining percent 5
    queue-limit 512 packets
class xQOS-CLASS-CS1_Scavanger_Data
    bandwidth remaining percent 1
class xQOS-CLASS-BE_Best_Effort
    bandwidth remaining percent 15
    queue-limit 128 packets
policy-map xQOS-SHAPED-10000-QUEUE-POLICY
class class-default
    shape average 10000000 100000 0
service-policy xQOS-QUEUE-POLICY
interface GigabitEthernet0/3
description Provider Etherlink
bandwidth 100000
no ip address
load-interval 30
duplex full
speed 100
media-type rj45
no shut
interface GigabitEthernet0/3.1111
description 10Mbit/s-EthMP to Branch
bandwidth 10000
encapsulation dot1Q 1111
ip address 10.200.111.1 255.255.255.252
ip tcp adjust-mss 1320
ip ospf network point-to-point
bfd interval 200 min_rx 200 multiplier 3
crypto map MAP-SECURE-WAN
service-policy output xQOS-SHAPED-10000-QUEUE-POLICY

Bandwidth requirec for Oracle 11g ADF application

Hi
What is the idel bandwidth recomend for oracle 11g ADF web application .

Can't be answered without knowledge of the app you are talking about.
100 user doesn't mean they are all active at once and even if they are it depends on how much data your app processes. This can't be answered from out point of view.
So your task is to find out how many users are doing what at a given time interval and then find out how much data is processed (there are plenty of tools available to measure this).
How a bout a test run with e.g. 10 users doing normal work with our app, measure the amount of data and calculate the bandwidth from there. Don't forget to take service level agreements (e.g. a page has to be submitted in x seconds) into your calculations.
Timo

Calculating Bandwidth

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