Fedora Networking :: Calculate The Available Bandwidth Rate?

Nov 11, 2010

We have a DSL , how can we calculate the available bandwidth so that we can shape the packet, We can assume the bandwidth to be 100mbps on the ethernet interface However, in DSL devices, the train rate(Bandwidth rate ) is varies according to different situation. How can i get the available bandwidth rate(from varies)?. Any method is there for getting the available bandwidth value....

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Networking :: Get The Available Bandwidth Rate From Variable Range

Nov 11, 2010

We have a DSL , how can we calculate the available bandwidth so that we can shape the packet, We can assume the bandwidth to be 100mbps on the ethernet interface
However, in DSL devices, the train rate(Bandwidth rate ) is varies according to different situation. How can i get the available bandwidth rate(from varies)?. Any method is there for getting the available bandwidth value..

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Fedora Networking :: Finding The Upcoming Bandwidth And Specify The Bandwidth Rateto Classes

Nov 18, 2010

I created a the class like this for shaping the packets with a specified bandwidth rate.....

tc qdisc del dev eth0 root
tc qdisc add dev eth0 root handle 1: htb default 15
tc class add dev eth0 parent 1:0 classid 1:1 htb rate 750kbit ceil 750kbit
tc class add dev eth0 parent 1:1 classid 1:3 htb rate 600kbit ceil 750kbit prio 0

For Our Requirement:-

I dont want to specify the bandwidth rate strictly like this rate750kbit ceil 750kbit,based on whatever speed is coming which should allocate the bandwidth rate for particular class...I need one application for finding the upcoming bandwidth & Is any other method is there for specify the bandwidth rate in a classes.

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Fedora Networking :: Slower Data Transfer Rate In KDE V GDM?

Nov 25, 2010

I have a FC13 box that has both Gnome and KDE sessions installed.

I have noticed on the KDE session that data transfer rates are slower than when I use Gnome.

In Gnome, I can transfer files between my FC13 machine and my Ubuntu 10.04 pc at a rate of 6.5 MB/s (52 Mb/s if my maths is correct), but in KDE the rate is only 3.5 MB/s (28 Mb/s).

"ethtool eth0" shows my NIC speed as 100 Mb/s. Obviously I am not hitting anywhere near that speed in either session, (a separate article may be happen in the future to address that), but I am curious as to why KDE is that much slower for file transfer.

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Fedora Networking :: Finding Collision / Error Rate On The Eth0

Jun 2, 2011

Is it possible to diagnose the cable between the PC and switch using F14 tools? I am suspecting that something is wrong due to <100Mbit xfer rates on a gigabit connection, but can't be certain. The switch is no help as it's a cheapo one with only link/act lights.

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Fedora Networking :: Possible To Get The Available Bandwidth Run App In Client Side?

Nov 26, 2010

Calculating the available bandwidth methods IGI/PTR,PATHLOAD,SLOPS,PACKET PAIR...I gone through above methodogies ,when i finish one methods(IGI/PTR) i came to know,one application should run in client side and another application should run in server side (i.e,) Internet Service Provider side,In IGI/PTR method ./ptr-client.c & ./ptr-server.c is there .,if we want available bandwidth,I Should run ./ptr-client.c (in myside)correspondingly ./ptr-server.c then only we wil get a availble bandwidth...My need is without run any application on the server side ./ptr-server.c like that,but I should develop the application only on client side (in my routerside based on linux).. 1:whether it is possible to get the available bandwidth run application in client side only?.if possiblehow i implement the code in client side( only )for getting the available bandwidth ...whether any source code is available?

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Networking :: Control Bandwidth Access With Squid - Allow Certain IPs To Have Higher Bandwidth Access?

May 27, 2009

We have a sipmle office network set up that we also use use to connect to the internet, however of late the number of users has increased thus slowing internet access. Bandwidth upgrade is not an option thus i have to do bandwidth shaping on our linux router. The question is how do set the squid configs to allow certain IP's range a certain percentage bandwidtheg 60% and furthe divide the rest. Alternatively how can allow certain IPs to have higher bandwidth access.

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Fedora Networking :: Monitor My Monthly Bandwidth Usage?

Aug 18, 2009

I'm on Comcast (insert vomit sound here) and they have a 250GB monthly limit. I don't think I'm remotely close to this on a normal month and want to figure out if I could perhaps squeak by with the 5GB limit imposed by Verizon's 3G wireless broadband.

I'm ideally looking for a quick easy-to-use GUI application, rather than something that's done via the command line.

I thought perhaps I could look in my Account and find a nice "You've used X percent of 250 GB thus far" window. Then I called, but Comcast couldn't tell me. They just borked me off to some Windoze application 3rd party which I'm supposed to install.

I run Skype and occasionally download Fedora iso images and so on. Rarely am I doing more than surfing the web, chatting, and sending emails. I doubt I'm even close to 250GBs but I'm guessing that 5GB will end up being problematic.

Are there any programs that will keep track of how much bandwidth I'm using? It'd be great to have an application that runs there in the taskbar and just shows a graph of how much I've used thus far.

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Fedora Networking :: Divide Equal Bandwidth Between / Among Clients

Mar 3, 2010

how to Divide Equal Bandwidth between / Among Network Clients? e.g if there is total bandwidth = 10Mbps and only 5 clients are online then bandwidth should be divided evenly i.e each client to 2Mbps and if 20 clients are online then 0.5Mbps to each client automatically. [in windows this can be done by bandwidthcontroller software now how it can be done in linux]

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Fedora Networking :: Netem Rate Limiting (token Bucket Filter) Not Supported?

Apr 3, 2010

I've been trying for a couple days now to get netem rate limiting to work on a Fedora 12 i686 virtual machine (both on VMware Fusion and KVM), and have had no success.In order to do outbound rate limiting, I want to use the netem token bucket filter (TBF), as described here:[URL]Unfortunately, attempting to use the TBF results in this error:

Code:
[root@f12-build ~]# tc qdisc add dev eth1 parent 1:1 handle 10: tbf rate 256kbit buffer 1600 limit 3000

[code]...

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Fedora Networking :: Sharing Bandwidth Using Gprs Modem In FC11

Aug 9, 2009

i want to ask a question. sometimes i use a gprs modem to connect to the net. the gprs modem uses the usb port. i've connected this pc to another machine through crossover cable. the problem is that when there are two active connections, firefox can't load anything. also how can i share the gprs modem with my other pc that is connected via crossover?

PS. in my active network connections it shows:
eth0- the NIC
and auto eth1 - the gprs modem

i have also tried to change the firefox preferences but to no avail.

Both my computers run on FC11.

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Fedora Networking :: 25kbps Torrent Seems To Occupy Entire 5.5mbps Bandwidth

Jun 19, 2009

I'm using Fedora 9 (64 bit).At the moment, I'm trying to download Fedora 11 using a bit torrent, which is reportedly connected at an average of about 25kbps.The only problem is that whilst the download is active, I can hardly even surf the net properly, even though my current isp connection speed is 5.5mbps.There don't appear to be any background processes running that would utilise any of the bandwidth, and as soon as I pause the torrent the problem disappears.I'm dual booting with Vista, and I don't seem to get the same problem under that OS, so I'm guessing it's something to do with my network settings in Fedora.

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Ubuntu Networking :: Calculate Broadcast & Network?

Jul 13, 2010

i m setting up a linux server and i have to setup ip , in static mode. so i know everything except those two things. how do i calculate them?

example ip:200.49.142.91
submask 255.255.255.248
gateway 200.49.142.89

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Ubuntu Networking :: How To Calculate Broadcast Address

Dec 13, 2010

How do I calculate broadcast adrress if the address space is 192.168.36.16/28 then what would be broadcast address.

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Networking :: Calculate Overall Network Load And Cpu Performance Of A Client?

Jan 8, 2011

I wrote a script which sends the server,files from /proc/ like dev,netstat,loadavg etc of a client. i want to calculate the network load and the overall cpu performance of the client using the information from the files.I donot know how to calculate that as i have too many values in those. which values will be useful and how to calculate?

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Fedora :: Calculate Moment Of Inertia In InsightII?

Jul 28, 2011

I made the structure of protein in insightII, and want to obtain the moment of inertia at x, y, z axis. I checked the insightII, it can only calculate the moment of inertia for a trajectory from simulation, and only give one value of the moment of inertia. (But I need 3 values at x, y, z axis)

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Networking :: How To Limit Upload Rate?

May 30, 2010

I have a linux box running between my router and my LAN. My connection speed is 10MB download and 1MB upload. The issue is that whenever someone starts to upload something, it is like my connection is down. No one else can open websites, read emails etc.Is it possible to place a limit for upload, maybe 50kb/s? This way, people won't use the entire upload speed available.

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Networking :: NAS Over WiFi Transfer Rate

Mar 27, 2010

I have a LaCie NAS which is mounted on my main linux machine over a wifi LAN using the cifs file system. I would stupidly expect the transfer rate between my hard drive and the NAS to be limited by the Wifi speed (54 Mbps) but when I transfer files, the speed tops at 1.9 Mb/s which is roughly 15.2 Mbps. The most puzzling thing is that when I do multiple simultaneous transfers, I reach approximately 3MB/s in total but none of the individual transfers goes beyond 1.8. Does anyone have an idea about what is keeping the transfer rate so low?

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Networking :: Rate Control In Ethernet

Apr 15, 2009

Can anybody tell me what is rate control and rate control mode of operation (in data link layer) in an Ethernet interface?. Does it have anything to do with auto negotiation in Ethernet?

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Networking :: Tc Rate Control Over Network

Jul 2, 2010

I want to implement rate control over network interface. So I have configured Linux PC as a router with netem installed and having two interface cards.

device1----> Linux router with netem ---> device2

device1 connects to eth0 and device2 connects to eth1 of the Linux router. eth0 is configured to connect to the internet and eth1 has a static IP address on a local network. I want to limit bandwidth on devices connected to eth0.So I applied the below rules using tc and tbf.

tc qdisc add dev eth0 root handle 1: prio
tc qdisc add dev eth0 parent 1:3 handle 30: netem
tc qdisc add dev eth0 parent 30:1 tbf rate 256kbit buffer 1600 limit 3000

Will the above work or should I use htb instead. I want to simulate the network conditions using different bandwidths.

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Ubuntu Networking :: How To Track Data Rate/use

Aug 8, 2010

I'm sure this is simple but I haven't a clue how to do it other than System Monitor, which only displays for the total uptime.

I want to see what my total network data use is in Bytes (GB, MB, or KB) downloaded/uploaded for the month or any given date range.

Rationale is I want to use wireless tethering from my phone to replace my broadband connection at home. At the moment my phone contract gives me unlimited data access, however if I were to sign a new contract today this would drop to 2 GB a month with hefty overage charges.

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Networking :: IPtables And Rate Limit Module

Apr 8, 2010

I'm a newbie in the world of netfilter/iptables. I've read an article about iptables and rate limit module:
Code: iptables -A INPUT -p ICMP --icmp-type echo-request -m limit --limit 1/minute --limit-burst 5 -j ACCEPT The firewall will let the first 5 packets in in the first minute, -limit-burst 5; this means, however, that the packets/minute now is 5, so any further packets are blocked until packets/minute = 1, i.e. 5 minutes later. In the sixth minute, packets/minute will be 5/6 < 1, so another ping request will be let in. When the extra ping request is admitted, the ratio becomes 6/6 = 1 again, and packets are DROPped again until the next minute.

Now I have some problems in understanding how it works.
For example: I want ping google.com in this way: the kernel firewall permits to send the first 5 packet to google.com (--limit-burst 5) and then it blocks the remaining packets for 5 minutes. At sixth minute (because I wish a limit rate equal to 1/minute: --limit 1/minute) one packet can send to google again. And so on.

So my rule should be:
Code: iptables -A OUTPUT -d url_of_google -p icmp --icmp-type echo-request -m limit --limit 1/minute --limit-burst 5 -j ACCEPT In this way, if i digit
Code: ping -f url_of_gogle I expect that the first 5 packets are accepted (and so zero '.' will print on the screen) and then for the remaining 5 minutes no one packets will be accepted (and so a long string of '.' will print). But it doesn't work...

In man pages of ping we read (about -f option):
-f Flood ping. Outputs packets as fast as they come back or one hundred times per second, whichever is more. For every ECHO_REQUEST sent a period ``.'' is printed, while for every ECHO_REPLY received a backspace is printed. This provides a rapid display of how many packets are being dropped.

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Networking :: How To Determine Bit Rate For Average Message In Within LAN Or LAN?

Jun 24, 2011

I need to knwo how to determine the bit rate for an average message in a within a LAN or LAN to Backbone.

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Networking :: Transfer Rate For Gigabit Ethernet

Apr 1, 2010

We have a Linux box which acts a a file server. Currently, files and directories are exported using NFS.At the moment, we are a bit concern on its data transfer performance. FYI, we are using a embedded Gigabit Ethernet port on the file server. We ran a few simple write tests between NFS client (also utilizes GigE port) and the NFS server. In these tests, both NFS server and client are both connected directly to each other with a Cat5E cable. Unfortunately, the write/transfer speed results are not as per our expectation. It scores roughly about 11-12MByte/s, where as theoretically Gigabit Ethernet transfer rate is able to reach up to approximately 120MByte/s.I wouldn't expect to reach the theoretical max transfer rate (it would be great if we can , but I would appreciate if you guys can share with us in terms of the following :

1) What's the practical max data transfer rate which you guys managed to observe in a normal Gigabit based connection? What about jumbo frames configuration?

2) Is there any additional tuning/configuration we need to do within the OS to reach those practical max data transfer rate figure?

3) Does PCI-e / system bus plays a role in achieving this speed? For example, we are using the embedded GigE port and we heard some people says embedded ports are actually sharing the system bus and resources with other devices, which might adds into performance issue. Correct me if I'm wrong.

4) Does converting to Cat6 cabling will guarantee an increase in the data transfer performance?

5) In the future (once we are clear on how much single GigE transfer rate we can go) , we are looking into doing bonding since that the NFS server's shared directory/volume read-write speed is way much higher (i.e 400-600MByte/s). Will bonding allow us to achieve higher NFS read/write speed? What are the bonding modes best used for this purposes? Appreciate if anybody who has experience in doing bonding for NFS can share their experience.

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Ubuntu Networking :: Wireless Connected But Not At 'N' Rate (above 54Mbps)

Oct 14, 2010

I have a Linksys WUSB600N wireless adapter for my laptop which uses the rt2800usb drivers.My router:

Router Model: Linksys WRT150N v1.1
Firmware Version: DD-WRT v24-sp2 (07/22/09) mini - build 12548M NEWD Eko

The wireless usb adapter connects to my network, and the router is running on mixed mode, except that I cannot seem to get wireless 'n' connection speeds. Both are capable of wireless n. I check the connection info and it is always 54 Mbps. I have set the router wireless on N-only and I lose my connection.Is the standard driver for this usb adapter in Ubuntu 10.4 unable to utilize 'n' speeds?

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Ubuntu Networking :: Wireless Iwconfig Rate Auto Too Low?

Dec 14, 2010

left to its own devices my wireless connects at too low a speed. I have a 20meg internet connection and my wireless is slowing it down to like 3meg. When I reboot into windows it's fine. When I run iwconfig eth1 rate 11M or even 24M the connection is much faster and runs fine, why won't it automatically go higher? Is this the fault of the driver? I am running Broadcom's driver compiled from source. Also, how can I set it to 24M at boot?

Edit: I guess I can put iwconfig eth1 rate 24M in rc.local, but I'd still like to get auto running higher, especially as my signal should be pretty good. Output from iwconfig white rate=auto:

eth1 IEEE 802.11 ESSID:"honeypot"
Mode:Managed Frequency:2.417 GHz Access Point: xxx
Bit Rate=1 Mb/s Tx-Power:24 dBm
Retry min limit:7 RTS thrff Fragment thrff
Encryption keyff

[Code]...

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Networking :: Slow Transfer Rate Between 2 Gigabit Devices?

Mar 2, 2011

I am struggling trying to understand the reason for a fairly slow data transfer rate between two machines. ( tried point to point and also via a 1 gb switch )
One is nfs/http/ftp server ( with raid1 and lvm on top ), the other one my desktop pc. Both OS with default options, no changes to kernel in proc or other sort of thing.

Hardware is full recognized and perfectly working: The server has 4gb ram, Intel Core 2 Duo CPUE6850 @ 3.00GHz, 1000Mb/s NIC card and Lucid 10.04 64 bit, 250Giga Hard disk. The client has 3gb ram, Intel Core 2 CPU 6320 @ 1.86GHz, 1000Mb/s NIC card and Ubuntu Maverick 32bit , 150Gb Hard disk.

Raw data is good:
gettons@gettons-desktop:~$ iperf -c MYSERVER
------------------------------------------------------------
Client connecting to MYSERVER, TCP port 5001

[Code].....

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Networking :: Two Network Devices For Increased Transfer Rate?

Jan 28, 2011

I have not tried this, and I am only wondering about the result.Let's say that I have a PC/Laptop with two network devices: an ethernet and a wireless. Can I connect both of the to the same network (if this network allows both connection) to increase the transfer rate between the PC/Laptop and the server???

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Networking :: Up-/download Rate For A Single Host (from Shell)?

Jan 25, 2011

I have a slave node uploading all kinds of backups to my server in the internet. Now I would like to display the actual upload and download rate to this server (not the entire nic-traffic, any protocol) in a small php-page for easy monitoring.I had a look at quite some monitoring tools and the one which kind of offers what I am looking for is iftop with a filter on the IP of my server. As I would like to periodically update a file with the actual rates, an interactive program won't do. A possibility would be to filter the packages myself using but this seems to be quite a long shot.The optimal solution would be a program or script printing out the actual upload to a host specified in the options to STDOUT

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Networking :: Bandwidth Monitoring Using SSH

Oct 5, 2009

I am renting a VPS from[URL].They do not supply a webhosting panel for restarting/shutting down or for seeing monthly bandwidth consumtion. I am running CentOS 5.3. I was wondering if theres any programs that you can install to view monthly/daily bandwidth consumption on our server?

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