Required bandwidth per connection

Hi
What is the required bandwidth for p2p video+audio chat between two people?
Usually upload rate is the bottleneck. What bandwidth is required for "excellent" quality and what is required for "decent" quality?
When 3 users share webcams+audio, does it means that each user have p2p connection to the two others?
Does it means that the quality of each video for 3 users is half the quality with only 2 users?
Do NetGroups/multicasting work for normal users or only in closed LAN networks?
Is multicasting effective for 3 users or only for larger groups?
For 3 < users < 10 , does multicasting provide performance and latency similar to hub and spoke without the bandwidth costs?
What happens when some users of the group are remote than others?
Do I need to set anything for multicasting to work or does it happen automatically?
Do I need to set audio/video quality according to each user bandwidth or does LCCS handle this automatically for me?
Thanks

Just to make sure I am clear, are you looking to determine the overall amount of bandwidth required for the sites you host? But have a limited capacity to actually test that?
If so, there are some modelling equations for determining bandwidth requirements that I could provide. This would help you work out what the overall load requirement would be without actually testing what the site has available and therby saturating your own internal network.
If you do want to actually test it out, but with limited bandwidth is to create a script that hits a wide variety of pages in your sites,or just use a mix of top hit pages. Then run the script(s) with a single user through one iteration, but ensuring that you have eLoad download manager configured to pull the page support files as well (images, css, js, flash files, etc). At the end of the test, the eload scenario report will have stats on the overall number of pages, hits and KBs. You can get to this report from eload - Create Reports - Reports - Session.
Here is an example from a recent test of mine:
Pages 10090
Hits 129211
Kilobytes 737701
So I know that on average, each page hit in the site has 12.8 hits is 73.1 KB in size.
Let me know if you have any questions about this.
CMason
Senior Consultant - eLoadExpert
Empirix

Similar Messages

How to limit bandwidth for guest per connection/user on 2504 WLC?

We have 2504 Controller with 24 AP's registered in a hotel and we would like to limit bandwidth per connection or per user.
I went to QOS Profiles > Bronze >
I do not see Per user Bandwidth Contracts(K)* instead I see WLAN QOS Parameters with below options.

Hello
Our WLC model 5508, but there is confusion on difference between Override Per-User Bandwidth Contracts (kbps) vs Override Per-SSID Bandwidth Contracts (kbps)
Our requirement-
On Guest SSID - Each user / session should not exceed bandwidth more than 758kbps upstream/downstream
Only Guest users cannot login to multiple device with single userID - applicable only to Guest SSID other SSID should not get impacted.
hope to get some response
cheers
ST

Programs that require a network connection won't work because there is no virtual IP address available for this session.

Programs that require a network connection won't work because there is no virtual IP address available for this session. Per application IP virtualization is enabled.
There are in fact available IP address's within the dhcp scope. Before I dig to deep into root cause.. Could the problem be RDS CAL licensing running out, or isn't that not a symptom of my error message?

Hi,
Thank you for posting in Windows Server Forum.
As per my research, there is no any issue related to RDS CAL licensing. Prior to the issue which you are facing, there are some basic setting which need to configure.
Application Compatibility – Turn on Remote Desktop IP virtualization
Some applications require a unique IP address, which is by default logically not the case if the application is running on RD Session Host. To solve this issue, Remote Desktop IP Virtualization is introduced. With this setting you enable the IP virtualization
feature. When enabling this setting you need to specify if the virtual IP is provided per session or per program. When using per program you need to define the executable to which an IP address should be configured. Desktop IP virtualization also needs the
configuration of the next setting.
Application Compatibility – Select the network adapter to be used for Remote Desktop IP Virtualization
When you need to use Remote Desktop IP virtualization configuring this setting is mandatory. You need to specify the IP address of the Network Interface Card which should be used for this feature. Besides the IP address you need also to specify the network
mask using the slash notation, for example 192.168.77.201/24.
Application Compatibility – Do not use Remote Desktop Session Host server IP address when virtual IP address is not available
More information:
Microsoft RDS Policies explained (Part 2)
http://www.virtualizationadmin.com/articles-tutorials/vdi-articles/microsoft-hyper-v/microsoft-rds-policies-explained-part2.html
Configuring Remote Desktop IP Virtualization II
http://blogs.msdn.com/b/rds/archive/2009/07/15/configuring-remote-desktop-ip-virtualization-ii.aspx
Hope it helps!
Thanks.
Dharmesh Solanki

Limit bandwidth per application

Hi there,
I am looking for a way to limit bandwidth per application under Mac OS X Lion ; either with a dedicated app or Terminal command.
I didnt find any tools with Google or App Store : does that mean "limiting bandwith" is a *bad* idea ?
The purpose is mainly to limit iTunes !
Thanks for advise.

I found a way to do this. It's a bit roundabout but it works. Rather than limit per application, you limit per server. For example I notice adobe creative cloud usually takes over my entire network connection when it's uploading a file to the cloud server, making it a pain to even browse the internet when it's sending a large file. Using little snitch's network monitor I see it's sending data to "creative.adobe.com", I enter that server into a program called speedlimit and set how much data it should send to that server. Fixed.
little snitch:
http://www.obdev.at/products/littlesnitch/index.html
speed limit:
http://mschrag.github.com/

J2EE.6.6 One JMS session per connection and code portability

Hello,
Section J2EE.6.6 of the J2EE 1.4 spec states that "Application
components in the web and EJB containers must not attempt to
create more than one active (not closed) Session object per connection."
This is contrary to the API documentation for javax.jms.Connection that
states "Because the creation of a connection involves setting up
authentication and communication, a connection is a relatively
heavyweight object. Most clients will do all their messaging with a
single connection." (Indeed I found that e.g. JBoss creates seven
threads for each connection that I create in a client).
I want to provide a library that encapsulates the required calls to
setup several JMS sessions. Given the above, this library must act
differently when run within and outside an EJB container. Is there a
portable way to determine in one's code whether the code is running
inside or outside an EJB container?
Regards,
Michael Lipp

Thanks very much for your responses. You miss, however, a very important point. Maybe I didn't emphasize this point enough in my original posting.
I want to write a client library with a "SomeServiceFactory" that creates a "SomeService". "SomeService" happens to require several concurrent topic sessions. But this requirement is to be hidden from the user of the service. And the supplied library should be usable both in a "client container" (i.e. a stand-alone client) and in an EJB or web container (with an EJB or Servlet making use of "SomeService").
So "SomeService" must behave differently when creating sessions, depending on whether it runs in the client container or an EJB or web container. Of course I can request the user/developer to specify some configuration file/option depending on the environment -- and then I can pray not to get too much problem reports because developers will simply forget to specify the environment as required or get things wrong.
Or I can find a way to automatically find out about the environment my library is used in and everybody is happy -- hence my original question.

My ipod 5th gen says it is connected to the internet and i can go on apps that require an internet connection but whe i try to use the weather or another app that uses your current location it cant find me???

My ipod 5th gen says it is connected to the internet and i can go on apps that require an internet connection but whe i try to use the weather or another app that uses your current location it cant find me???

If you open the Maps app where does that say you are located?
For location the iPod uses the location of nearby routers that are in Apple's database of routers and their location. Thus it appears that Apple's database is incorrect. You do not have to be connected to the router, just within range.
Apple periodically updates their database based on information they obtain from iPhones, The iPhone has to have turned on the option to send info to Apple. no one has found another way to get the location of a router added/corrected.
You can confirm that by going to well-know place with wifi like Starbucks or McDonalds

How do I set up my Airport Express to my Viasat modem, which requires a DHCP connection, without getting a double NAT connection error?

I have an Airport Express connected to a Viasat 4100 satellite modem. This requires a DHCP connection and is connected to my Airport Express by Ethernet. I then have three computers (two running Mavericks and one running Lion) and two IPhone 5s and an Apple Tv on the network. If the Airport Express is set to DHCP and NAT then the network works and I have internet, but the amber light flashes and I have a double NAT error. If I use it in Bridge mode the airport express goes green but I have no internet. How can I set it up so it works properly? If anyone knows could they please give all the settings I shoud use on the Airport Express as I may have left incorrect setting on it whilst trying to fix the problem. I have checked and it has been confirmed that I cannot change any settings on the satellite modem.

Go into AirPort Utility, click on the AirPort Express, and click on the "Double-NAT" error. Click Ignore. There's nothing that can be done about the Double-Nat unless you ignore it (no harm) or contact your ISP and get them to change your Modem/Router into Bridge Mode, and even then can't guarantee that you won't get that error.
Again, best thing to do: Ignore the Double-Nat Error.

I am not able to access the "Settings" on my iPad 3. I just get a gray screen for about 30 seconds and then the app shuts down. I am also unable to access the App store, iTunes, or any app requiring an internet connection. Any thoughts?

I am not able to access the "Settings" on my iPad 3. I just get a gray screen for about 30 seconds and then the app shuts down. I am also unable to access the App store, iTunes, or any app requiring an internet connection. Any thoughts?

First, try a system reset. It cures many ills and it's quick, easy and harmless...
Hold down the on/off switch and the Home button simultaneously until the screen blacks out or you see the Apple logo. Ignore the "Slide to power off" text if it appears. You will not lose any apps, data, music, movies, settings, etc.
If the Reset doesn't work, try a Restore. Note that it's nowhere near as quick as a Reset. Connect via cable to the computer that you use for sync. From iTunes, select the iPad/iPod and then select the Summary tab. Follow directions for Restore and be sure to say "yes" to the backup. You will be warned that all data (apps, music, movies, etc.) will be erased but, as the Restore finishes, you will be asked if you wish the contents of the backup to be copied to the iPad/iPod. Again, say "yes."

Internet-required apps not connecting (even though internet works!)

Hi, just purchased a shiny new iMac 27inch after my old faithful G5 tower finally went to the great PC in the sky.
Enjoying the experience immensely but have a big problem with bootcamp.
I installed xp service pack 2 via bootcamp and after hundreds of microsoft updates it is now sitting at the most up to date version of xp.
I wanted to do two things with xp initially - install AVG free and steam (both of which I happily run on my windows pc). Problem is that with both applications I get a warning message saying that the app cannot connect without an internet connection.
Now, I do indeed have an internet connection which is running fine. I have tweaked and turned windows firewall completely off - they already have exceptions selected for steam and avg anyway - but still get the same problem.
I have removed both apps several times - and reinstalled - but no joy. Incidentally, normally you would get the startup program for AVG from the internet which then requires the internet connection to download the full program, but found a link to do this direct instead - as I had the same problem with the startup problem. I haven't yet tried, but I would suspect that this may well apply to all applications that need an online update.
I was wondering if this is a problem noted previously, but also if this was something that I may have to alter via the Mac OS?
Any help would be greatly appreciated.

Well, thought I would answer this one myself after I realised what was wrong. The issue was with a faulty and incomplete installation of zonealarm. In fact it was so incomplete that it didn't even appear as any visible files on the hard drive!
First of all I tried to reinstall ZA which brought up an error saying that I couldn't install over the previous version because of an error and I should restart (helpful!)
Of course, restarting didn't do anything to help. So in the end it was a case of going to ZA's support pages to get help and performing some core file removals in safe mode. Don't worry - all clear instructions are available.
So, in the end, this issue was down to a rogue and somewhat zealous installation.
I'm now connected to the internet and steam is happily downloading.
woo hoo!

My iphone 4 says activation required and then connect to itunes and when i try to connect it wont what do i do (i cant use it at all) :'(

my iphone 4 says activation required and then connect to itunes and when i try to connect it wont what do i do (i cant use it at all) :'(

i got it from O2... and it dosent do anything when i plug it into my laptop it dosent come up at all or connect to itunes

How to set a maximum download size per connection in the ASA?

Hi, I would like to avoid big downloads so I want to set a maximum download file size. How can I set the limit MB allowed per connection in the ASA?
Thanks

Hello Andrew,
I got your question, but I think we might be confused here, I did not specify something after the timeout but when you configure it you will see you have the same options
Here is the configuration options on 8.2.5
ciscoasa(config-pmap-c)# set connection timeout ?
mpf-policy-map-class mode commands/options:
dcd          Configure dead-connection-detection retry interval.
embryonic    Configure absolute time after which an embryonic TCP connection
               will be closed, default is 0:00:30.
half-closed Configure idle time after which a TCP half-closed connection
               will be freed, default is 0:10:00
idle         Configure idle time after which a connection state will be
               closed.
Now on an ASA running 8.4.4(9)
WPLG-ASA-1(config-pmap-c)# set connection timeout ?
mpf-policy-map-class mode commands/options:
dcd          Configure dead-connection-detection retry interval.
embryonic    Configure absolute time after which an embryonic TCP connection
               will be closed, default is 0:00:30.
half-closed Configure idle time after which a TCP half-closed connection
               will be freed, default is 0:10:00
idle         Configure idle time after which a connection state will be
               closed.
So as you can see same options, no change at all
Hope that I could help
Remember to rate all of the helpful posts

The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required.

try
MailMessage mail = new MailMessage();
SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
mail.From = new MailAddress("[email protected]");
mail.To.Add("[email protected]");
mail.Subject = "Test Mail..!!!!";
mail.Body = "mail with attachment";
System.Net.Mail.Attachment attachment;
attachment = new System.Net.Mail.Attachment(@"C:\Attachment.txt");
mail.Attachments.Add(attachment);
SmtpServer.Port = 587;
SmtpServer.UseDefaultCredentials = true;
SmtpServer.Credentials = new System.Net.NetworkCredential("userid", "Password");
SmtpServer.EnableSsl = true;
SmtpServer.Send(mail);
Catch(Exception exception)
When i m run this part of code it throw an Ecxeption
Given Below is the Error..
The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required.
Bikky Kumar

try
MailMessage mail = new MailMessage();
SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
mail.From = new MailAddress("[email protected]");
mail.To.Add("[email protected]");
mail.Subject = "Test Mail..!!!!";
mail.Body = "mail with attachment";
System.Net.Mail.Attachment attachment;
attachment = new System.Net.Mail.Attachment(@"C:\Attachment.txt");
mail.Attachments.Add(attachment);
SmtpServer.Port = 587;
SmtpServer.UseDefaultCredentials = true; ///Set it to false, or remove this line
SmtpServer.Credentials = new System.Net.NetworkCredential("userid", "Password");
SmtpServer.EnableSsl = true;
SmtpServer.Send(mail);
Catch(Exception exception)
Given Below is the Error.. The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required.
Solution:
The error might occur due to following cases.
case 1: when the password is wrong
case 2: when you try to login from some App
case 3: when you try to login from the domain other than your time zone/domain/computer (This
is the case in most of scenarios when sending mail from code)
There is a solution for each
solution for case 1: Enter the correct password.
Recomended: solution for case 2: go to
security settings at the following link https://www.google.com/settings/security/lesssecureapps and
enable less secure apps . So that you will be able to login from all apps.
solution 1 for case 3: (This might be helpful) you need to review the activity. but reviewing the activity will not be helpful due to latest security
standards the link will not be useful. So try the below case.
solution 2 for case 3: If you have hosted your code somewhere on production server and if you have access to the production server, than take remote
desktop connection to the production server and try to login once from the browser of the production server. This will add exception for login to google and you will be allowed to login from code.
But what if you don't have access to the production server. try
the solution 3
solution 3 for case 3: You have to enable
login from other timezone / ip for your google account.
to do this follow the link https://g.co/allowaccess and
allow access by clicking the continue button.
And that's it. Here you go. Now you will be able to login from any of the computer and by any means of app to your google account.
Regards,
Nabeel Arif

Possible to configure per connection timeout values?

hi,
please, does anybody know how (or whether or not it is even possible) to configure a "PER CONNECTION" timeout on the connections - created by jndi - to an ldap server?
my understanding is that setting the "com.sun.jndi.ldap.connect.timeout" property on the javax.naming.directory.InitialDirContext sets a _global_ timeout value for _all_ connections created/managed by that InitialDirContext (that is, with a "PER CONTEXT" scope).
however, what i would like to do instead, is somehow configure a different timeout value for each individual connection that a InitialDirContext might know about.
the first solution that will probably pop in your head is "connection pool". however, the app sets "java.naming.ldap.factory.socket" property to a custom socket factory class. according to the following paragraph from the jndi tutorial, that disqualifies the app from using connection pools:
"There are a couple of environment properties that automatically disqualify a Context instance from using a pooled connection. A Context instance cannot use a pooled connection if it has its "java.naming.ldap.factory.socket" property set to a custom socket factory class, or its "java.naming.security.sasl.callback" property set to a custom callback handler class, or its "com.sun.jndi.ldap.trace.ber" property set to enable protocol tracing."
http://java.sun.com/products/jndi/tutorial/ldap/connect/config.html
even if we could use connection pools, we still wouldn't be able to set "per connection" timeout values. would we?
one proposed solution is to completely rip out jndi from the app and replace it with the netscape directory sdk for java. to me, that seems like too drastic a measure though - given the project's time-constraints (the way the app was originally designed does not lend itself to a straight-forward "pop-out/drop-in" type replacement). i was hoping there would be a simpler alternative (a jndi-based configuration type solution, for example).
any suggestions would be gratefully appreciated. thanks in advance for your replies.

Enable the Default Host option in the AirPort Admin Utility, use the IP address you have assigned to your server.

Program ID Required for RFC Connection

Hi All,
I'm trying to create a RFC Connection betwen SAP BI and SSIS (SQL Server Integration Services). In SM59 screen i'm unable to get the appropriate Program ID required for the connection. Could someone please help me in knowing how to get it.

Yogesh,
While creating TCP\IP type RFC destination, when you select Radio button "Registered server program", there you have to provide Program Id there. So for your information:
Program Id is a string which can be anything even your name.
i know only R3 and XI integration and in that case you will make your RFC communication channel active first with a program Id(ant thing) and with logon credentials of other system + gateway host and service.
then use that program id in RFC destination and test it.
If get empty request then RFC destination is ok.
BR,
Alok

Tool for Airport network statistics per connected device ?

I'm in search of a tool that would help me identify network traffic load per connected device to my Airport network.
My network is made of
* WiFi infra: one main Airport Extreme base station connected thru Ethernet to my SP's cable-modem + 2 Airport Express as relays, all interconnected with WDS.
* WiFi clients : 2 Macs + 2 PCs + 1 printer + 1 WiFi PDA-Phone, all connected thru WiFi only
* I suspect misuse by one of the Macs or PCs (or alien ?) of WiFi network as sometimes network performance is really low, impacting all end-points' network performance
* ideal tool could be based on SNMP stats of Ethernet/TCP/UDP/ports & packets per connected device. Should cover each Airport Express relay, the main Airport Extreme, possibly the cable-modem, and bring help for root cause analysis to go up the chain to faulty client and application (at least port/protocol)
any idea of such kind of tool (preferably run on Mac OS X)
thx in advance

I apologize for taking up your time. I had bought this to use with my PS3 (60GB Launch model with 802.11b) but hadn't used the PS3 in the equation yet. I kind of gave up on the project for awhile and unplugged the Express. Just for giggles I plugged it in later and cabled it up to the PS3 for the first time. Worked perfectly. Now my PS3 downloads are flying.
I'm not sure what solved the problem but it is working great now! Thanks again for the help.

Required bandwidth per connection

Similar Messages

Maybe you are looking for