In computer networking and computer science, bandwidth, network bandwidth, data bandwidth, or digital bandwidth is a measure of available or consumed data communication resources expressed in bits/second or multiples of it (kilobits/s, megabits/s etc.).

learn more… | top users | synonyms

1
vote
1answer
419 views

Can TC limit bandwidth by the Qos field of IP header

We are developing a client/server applications. There are three types of network data in our server app: Realtime data such as those of Video/audio, Critical Data such as those of Database data and ...
2
votes
1answer
63 views

How to view network activity across entire domain?

Wondering if Windows Server 2008 R2 Std has any features that allow you to view network information like number of connections, current rate, total bytes, etc, for all computers on the domain? ...
0
votes
2answers
295 views

Excessive ARP request with no reply

I had been monitoring our LAN setting due to slow bandwidth. In the wireshark, I am seeing an ARP request that is never resolve to a MAC address from the same IP address. I did a NMAP scan, the ...
0
votes
2answers
99 views

Bandwidth Reservation vs QOS

what is the difference between bandwidth reservation and QOS? for example, if I reserve 30Mbps to VOIP traffic on a router, is that the same of QOS? or does QOS work in a different way?
1
vote
1answer
74 views

Which one VoIP SIP audio codec should I choose to high quality calls?

The quality of VoIP calls depends on the codec used for the transmission and on the bandwidth of Internet connection. I want to use best optimized codec for my Internet connection. I have to select ...
0
votes
1answer
273 views

IIS bandwidth Monitoring

I have a public MS CRM 2011 install and one of my remote users reported using about 10gig of data from there outlook client. Is it possible in real time to see connected users in IIS and how much ...
3
votes
2answers
300 views

Can TC (Linux Qos Utility) limit bandwidth usage of target applications?

We have many applications running on the same server machine which is inside a network of servers. We want limit the bandwidth of our applications to specific value. So here are some choices: ...
4
votes
2answers
2k views

How to estimate network data transfer volume for a mysql database

When planning to port my application (Java+Tomcat+MySql) to a cloud hosting, I've found that one important factor to consider is the volume of data transferred to/from the database, as it is limited ...
0
votes
1answer
136 views

Copy over lan : best way to segment copy?

I do not really know where to post my message. Networks or system or scripting, so ... I have a requirement in my company. Here is the goal : Monthly I'll have to copy a package> 500MB on 25 ...
1
vote
0answers
61 views

When CopyQueueLength is high, how do I control which server is the source?

When I have a DAG with copies spread all over the world, and the initial seeding is already complete, how does Exchange control which server is used to fulfill the outstanding CopyQueueLength logs ...
2
votes
1answer
976 views

is there such a thing as “too many packets per second”?

we have 2 offices in separate buildings. there is an ethernet link between the two. The link is provided by the company that manages one of the buildings, and they provide us with 100Mbps bandwidth ...
2
votes
1answer
92 views

how can I make sendmail go faster

We've recently had an overnight ISP outage in our area which brought down our mail system. Now that the connection is back we are trying to push through the mail queue faster. We've tried running the ...
-3
votes
2answers
75 views

high bandwidth usage iscsid, who's doing it?

We run a couple of onapp nodes that connect through iSCSI to a SAN. This is now using up all bandwidth and we want to know where it is coming from, we have been search for days now and would like to ...
0
votes
1answer
44 views

Server bandwidth and website weight

I was wondering... Having the followings: a webserver with 100mbps output bandwidth (enough cpu and enough ram) a website 1 MB (Megabyte) heavy is the following assertion true? The server has an ...
-1
votes
2answers
303 views

Does “ThirdPartyReplication” in an Exchange DAG reduce overall bandwidth requirements? [closed]

I have to re-seed several databases and am looking into opportunities to reduce my bandwidth requirements. When I issue the command get-DatabaseAvailabilityGroup there is a feature called "Third ...
7
votes
1answer
985 views

Are network switch data transfer speed limits per port or per device?

When network switches report speeds of say 100 Mbit or 1 Gbit, are they referring to the maximum speed per Ethernet port or is this the physical limit of the switch on all ports? Say for example two ...
0
votes
2answers
733 views

Is there any open source software for QoS (traffic control)? [closed]

We are doing QoS (traffic control) for our server application. This server provides file download service for users and we want to give different users different priority and bandwith. Suppose the ...
0
votes
1answer
70 views

Cheap bandwidth to Google apps (Dynamics E-mail Router hosting)

To give a bit of context, we are looking to host our Microsoft dynamics e-mail router to connect to Google apps e-amil. We are looking at many options from varying angles, but one possible option is ...
-2
votes
1answer
96 views

Unusal internet traffic drop off [closed]

I'm after advice on how to approach a problem I'm having on my e-commerce site. Occasionally, the site suffers a levelling off of users on the website, compared to our historic traffic this is ...
0
votes
3answers
2k views

Cisco 881 throughput/bandwidth issue

We have a dedicated 30Mb connection (up/down) from our ISP, but we can only seem to get 10Mb (up/down) from the router. Does anyone know what we're missing, or how we can tweak the settings on this ...
2
votes
1answer
730 views

Bandwidth Manager Using Squid

I am trying to create a internet distribution software for an ISP (an internet distributor or a school or other such organizations) like the one here It will have restrictions and policies for users ...
1
vote
1answer
201 views

Controlling rsync bandwidth usage by percentage of available bandwidth, in userspace?

I often use rsync on a OSX-based laptop to synchronise some files from it to a Linux server. The laptop can be connected to different networks with greatly varying bandwidths (office ethernet, wifi, ...
2
votes
1answer
137 views

How should I estimate the amount of bandwidth available to an application?

I'm writing a function that will calculate the maximum number of concurrent streaming audio listeners supported an amount of network bandwidth, given stream's bitrate. listeners = (bandwidth in ...
0
votes
1answer
347 views

Socket based byte counts

I see a lot of tools to get the RX and TX byte counts for transmission on interfaces, is there any tool/program that I can use to get a total transmitted byte count for a single specified socket? I'm ...
0
votes
0answers
24 views

Control Usage Of bandwidth for each site

The scenario is as follow. Let's take an example I have one domain called abc.com.I have purchased this domain.Now I am providing facility to the users to create their sites on this domain.So suppose ...
1
vote
2answers
2k views

What determines the maximum throughput of a Cisco router?

I'm looking at Cisco's documentation on the issue http://www.cisco.com/web/partners/downloads/765/tools/quickreference/routerperformance.pdf and I'm having a hard time getting the numbers to add up. ...
7
votes
2answers
5k views

Limit incoming and outgoing bandwidth and latency in linux

I realise many similar questions have already been asked, but so far I've yet to find a solution to my problem. I have a virtual linux server (running Debian Squeeze) that I use for testing of ...
0
votes
2answers
678 views

Dynamic throttling of bandwidth

I am planning on setting up streaming server. Streaming is done kind of like YT does it; there will be a large number of audio content and each user can listen to it right on the website. In order ...
17
votes
3answers
4k views

Connecting two desktop switches with more than one cable?

I was hoping to find a way to increase bandwidth between two desktop switches I have, and I wondered if connecting them with two cables (or perhaps three) instead of just one might increase ...
2
votes
1answer
145 views

Does 404 errors eat the server bandwidth?

I am facing a strange issue where one of our servers (used for internal purpose) hosted by Rackspace uses huge amount of bandwidth (but our actual users are using the server rarely). FYI, the said ...
0
votes
1answer
155 views

Is there a command to check the network bandwidth of a server? (linux)

I am trying to compare different cloud server providers and one thing I am interested is the network bandwidth like 1Gb/s. Many vendors are not explicit in this respect. Is there a way in Centos to ...
0
votes
0answers
102 views

TC Bandwidth Shaping for all clients

I am running a video site and want to shape the download speed of all clients. How can I apply my tc class to all the clients by ip, i.e. every user has a download speed of 128kbit/s, no matter how ...
-3
votes
2answers
227 views

What software to use to generate bandwidth graphs in real time? [closed]

What sofware could I use to monitor my server's bandwidth in realtime, or at least, update every x minutes. My server (dell r620) is connected to a routerboard Mikrotik rb1200. But, as my router is ...
0
votes
1answer
399 views

Bandwidth Usage: ActiveSync vs IMAP/CalDAV/CardDAV

I have been trying to find bandwidth usage information how the technologies compare. I understand that ActiveSync is instant, and new changes get "pushed" to subscribers. But IMAP/CalDAV/CardDAV is ...
0
votes
1answer
447 views

Can FTP bandwidth usage result in dropped SSH connection?

It seems highly implausible, even ridiculous, to me. I login by SSH to the CentOS server. I FTP to another server and begin a large file transfer out (uploading to other server). After some time ...
-2
votes
1answer
67 views

Backupchain bandwidth calculation [duplicate]

we have 7 servers being backed up right now using backup chain locally for about a year now. I have tried the FTP backup on one of our financial number crunch VMs to move it offsite to our other ...
1
vote
1answer
2k views

Active Directory Replication Bandwidth Consumption

There are lots of articles out there describing how to architect your replication toplogy, and all the reasons why, and they all boil down to conserving bandwidth, and achieving a convergence time ...
0
votes
1answer
254 views

LAN bandwidth in Linux is low

everyone, I connect two PCs both with 1000Mbps NIC. One(A) of them runs Fedora 8 while another(B) runs Windows7. I test bandwidth between them with Ixchariot, it shows about 10Mbps. If A and B both ...
0
votes
0answers
75 views

limit bandwidth for each IP

I have a basic question. I use Frontpage to manage my website and I assume it uses HTML coding. I recently experienced a huge traffic coming to my website from few (say less than 10) IPs and shut ...
-3
votes
2answers
85 views

How much data can be sent and received at the same time on a T-3?

A T3 is rated for 45Mbs. What is the expected run time upload and download speed of a T3 assuming both are happening at the same time?
0
votes
1answer
215 views

100 Mb/s port limit reached or something else?

I have a dedicated server with a 100 Mbps port. A few times a week, there comes a time (usually in the evening hours) when there is an extremely high bandwidth usage, by far more than usual. I am on ...
1
vote
1answer
821 views

Random gigabit bandwidth with my Samba fileserver

I own a personnal Fileserver, build on an AMD X2 platform, with an intel gigabit CT network adapter, running debian 6.0. I've built a raid5 (2To x 3), shared by samba 3.5.6 From my desktop computer ...
1
vote
4answers
5k views

How can I limit a users bandwidth in Windows Server 2008 R2 [closed]

We have a user that likes to download movies with torrents in our office and it just kills the overall network performance. Unfortunately we need this user and don't want to confront him directly ...
1
vote
4answers
3k views

How can I calculate the 95-percentile bandwidth usage of a network device?

My provider is billing my bandwidth using the 95-percentile method. I know what it is in principle (take measurements, throw the top 5% away and use the remaining highest as result). The question ...
3
votes
2answers
1k views

Monitor Internet bandwidth by IP in a LAN environment?

I am new to networking so pardon if this is a stupid question. I want to see how my users use the internet bandwidth. I have around 50 Users in the network and I am using a checkpoint edge series ...
1
vote
2answers
136 views

How can I report bandwidth usage over x days, broken down by port and protocol?

I need to generate reports showing bandwidth usage broken down by port and protocol, based on all data sent/received over the last x days, in a fairly simple and secure way. Storing full traffic ...
2
votes
1answer
181 views

Is there an effective way to monitor the load on each switch?

We have about 200 IP phones in our building and I realize we got more complaint about the phone quality after we switched our internet from 50Mbps to 200Mbps Up/Down. I know there's a possibility ...
3
votes
2answers
963 views

Determine what machine/device is consuming bandwidth

I sometimes help a small office with a few issues. About two months ago, they were complaining of poor internet performance. Long story short, I found one person running Carbonite on a Mac that was ...
0
votes
1answer
1k views

openvpn TCP/UDP slow SSH/SMB performance

I have question about strange behavior of my openVPN configuration on Debian lenny. I have 2 server configs (one proto tcp-server based and one proto udp based). ISP bandwidth is 7Mbit/7Mbit. When I ...
-3
votes
2answers
2k views

Would a VPN allow me to get around the monthly data cap set by my ISP? [closed]

My total data allowed without being charged extra is 50gb during 8am-12am and unlimited overnight from 12am-8am. I have to watch how much HD streaming I do and mass downloading because of this. Thanks ...