WRT54GS slow UDP multicast speed

Hi everyone. A techie question for you! I am having problems using UDP multicast/broadcast over UDP. My PC is wirelessly connected to our LinkSys WRT54GS router. I have a small application that broadcasts data over UDP. When I send data using unicast (to a specific IP address) the router is reasonably fast, over 2mbps. But when I send data using multicast or broadcast modes over UDP, it is really slow, like about 100kbps. When I connect to the router with an ethernet cable, it runs multicast very fast. When I connect to another router (a D-Link) it also runs multicast very fast. I have the "Filter Multicast" option unticked on the firewall page. Any ideas about why it is running so slow? Thanks! Matthew.

Hi,
I'm also having trouble with milticast traffic on WRT54G2.
My linux milticast router (igmpproxy) is connected to the internet on one side and to local network on the other site. On one LAN site, there is a WRT54G2 acces point / switch.
If I watch IPTV on the LAN, the WLAN is extreamly slow to the point being unusable.
Is there a solution to this problem?
Similar problems:
http://forums.linksysbycisco.com/linksys/board/message?board.id=Wireless_Routers&message.id=118765
http://forums.linksysbycisco.com/linksys/board/message?board.id=Wireless_Routers&message.id=73514

Similar Messages

WRT54G - Slow wireless connection

Hi,
I installed WRT54G router last week for my wireless connection. Right form the very first day, i have been seeing slow/sporadic connection speeds. I also upgraded my firmware version (8.2) & it doesn't help. I have given the output of IPCONFIG /ALL for your reference. Please guide me if you find anything odd.
Windows IP Configuration
        Host Name . . . . . . . . . . . . : venki
        Primary Dns Suffix . . . . . . . :
        Node Type . . . . . . . . . . . . : Hybrid
        IP Routing Enabled. . . . . . . . : No
        WINS Proxy Enabled. . . . . . . . : No
        DNS Suffix Search List. . . . . . : hsd1.ct.comcast.net.
Ethernet adapter Local Area Connection:
        Media State . . . . . . . . . . . : Media disconnected
        Description . . . . . . . . . . . : Realtek RTL8139/810x Family Fast Ethernet NIC
        Physical Address. . . . . . . . . : 00-0A-E4-D5-26-CA
Ethernet adapter Wireless Network Connection:
        Connection-specific DNS Suffix . : hsd1.ct.comcast.net.
        Description . . . . . . . . . . . : Intel(R) PRO/Wireless 2200BG Network Connection
        Physical Address. . . . . . . . . : 00-12-F0-D0-2B-5F
        Dhcp Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 192.168.1.101
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 192.168.1.1
        DHCP Server . . . . . . . . . . . : 192.168.1.1
        DNS Servers . . . . . . . . . . . : 68.87.71.226
                                            68.87.73.242
        Lease Obtained. . . . . . . . . . : Thursday, July 17, 2008 11:49:44 AM
        Lease Expires . . . . . . . . . . : Friday, July 18, 2008 11:49:44 AM

Not sure if you performed this or not, once you do a factory reset, immediately after that you are suppose to perform a factory reset by holding is the reset button in on the back of the linksys router for 30 seconds, then wait about 2-3 minutes for the router to sync back up.
Important = Write down your previous settings in the router as they will be erased and you will have to manually input the info.
Hope that this will help,
Ttech
If not, try this
Here are some steps to follow for a slow or poor connection.
1.      Give your network a unique SSID and do not use Linksys and set your SSID Broadcast to enable.
2.      You can also try A different channel. There are 11 channels and 1, 6 or 11 is better
3.      You can try raising your router approximately 4-6 feet above the floor and make sure the antennas are vertical.
4.      access your wireless software by going to your Profile or preferred networks, if any are named Linksys or ones that you do not know please delete them. Go to the settings or properties and check the information to make sure it is correct.
5.      See if there are any updated drivers to download.
6.      Try to use WPA encryption if you can
*** As always upgrade to the latest firmware
Good luck,
Ttech

TS1398 Ipad Minin -Cellular 64GB Slow down load speed ???

Hello From Australia
Question I recently boiught a new Ipad Minin -Cellular 64GB and am very disapointed
Reason is Very Very Slow down load speed ??? My Ipad Minin -Cellular 64GB when connected to our home Telstra high-speed Wi-Fi Internet has a maximum download speed of say 2Mbps while my laptop pro (side by side comparison) is downloading at 8Mbps ?? I am using a Telstra Technicolour :
Wireless Access Point - Telstra
Configuration
Interface Enabled:
Physical Address:
a4:b1:e9:79:99:b5
Network Name (SSID):
Actual Speed [Mbps]:
65
Band:
2.4GHz
Region:
Australia
Channel Selection:
                                     Automatic                                     Manual
Channel:
                                     1                                     2                                     3                                     4                                     5                                     6                                     7                                     8                                     9                                     10                                     11                                     12                                     13
Channel Width:
                                     20MHz                                     20/40MHz
Allow multicast from Broadband Network:
Security
WPS Enabled:
Broadcast Network Name:
Allow New Devices:
                                     New stations are not allowed                                     New stations are allowed (via registration)                                     New stations are allowed (automatically)
Encryption:
Disabled
Use WEP Encryption
Use WPA-PSK Encryption
WPA-PSK Encryption Key:
WPA-PSK Version:
                                     WPA                                     WPA2                                     WPA+WPA2

This is the iPod touch forum. I requested your post be moved to the iPad forum.

Problem with receiving of the UDP multicasting on multiple interfaces in the W2K12 cluster

Hi,
I have my .NET application which receives the UDP multicasting communication. It works fine until it is deployed on a W2K12 cluster. Some multicast groups are still available and some are not in the cluster. The
problem is caused by the cluster which creates a virtual interface for a inter-node communication. When the cluster is on and my app is trying to subscibe to the affected group then IGMP packets are routed to the cluster's
virtual interface where the multicast communication is not available. When the cluster (cluster service) is off all groups are available and IGMP is routed to a right interface.
I also have a different application which is not based on .NET and it receives all multicast groups in any deployment (same W2K12 clustered server). So, I guess that in my app I have to tell to the socket somehow, which local interface should
be used for a particular multicast group. In my app I use code below for a group subscribtion, but I still can't manage routing of IGMP to a right local interface. Can you help me?
As you can see in the code example I try to mapp a group to a local interface using its IP and index using MulticastOption class, but it has no effect. Different interface (cluster's virtual interface) is used for a IGMP
subscribtion. I also tried to bind\set local interface to Any, but without success.
It seems that there is some OS logic which overrides my setup. But, it must be possible to do the socket setup correctlly because non .NET application works fine.
Thanks.
Regards,
Marek
public void Start(string[] args)
//args[0] - multicast group
//args[1] - multicast port
//args[2] - local interface IP
//args[3] - local interface index
UdpClient udp = new UdpClient();
udp.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
udp.Client.Bind(new IPEndPoint(IPAddress.Parse(args[2]), Convert.ToInt32(args[1])));
MulticastOption mcastOption = new MulticastOption(IPAddress.Parse(args[0]));
mcastOption.LocalAddress = IPAddress.Parse(args[2]);
mcastOption.InterfaceIndex = int.Parse(args[3]);
udp.Client.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, mcastOption);
udp.BeginReceive(new AsyncCallback(Receive), udp);

I don’t know if it will help you but I can illustrate my problem on the following prints from netsh and route tools. First print from netsh shows that the affected group 224.0.46.232 is assigned to interface 20. Second print shows
that interface 20 is Microsoft Failover Cluster Virtual Adapter where multicast communication is not available.
When the test app, which works fine, is used than these prints show that group 224.0.46.232 is assigned to interface 19 - Microsoft Network Adapter Multiplexor Driver, where multicast communication is available.
So, the question is how to manage these „prints“ to requested setup in .NET.
Regards,
Marek
C:\Windows\system32>netsh interface ip show joins
Interface 1: Loopback Pseudo-Interface 1
Scope       References Last Address
0                    0 Yes   239.255.255.250
Interface 20: Local Area Connection* 12
Scope       References Last Address
0                    0 Yes   224.0.0.1
0                    1 Yes   224.0.0.252
0                    1 Yes   224.0.46.232
Interface 19: Public
Scope       References Last Address
0                    0 No    224.0.0.1
0                    1 No    224.0.0.252
0                    0 Yes   239.255.255.250
C:\Windows\system32>route print
===========================================================================
Interface List
19...3c d9 2b ef 8a ec ......Microsoft Network Adapter Multiplexor Driver
20...02 91 08 09 1a ae ......Microsoft Failover Cluster Virtual Adapter
1...........................Software Loopback Interface 1
16...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter
21...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #3
===========================================================================

I have to send messages through UDP multicast and unicast from same port. In Labview I tried that it throws error. I heard it is possible by means of Datagram (UDP unicast and multicast) Port Sharing. How can it be achieved in Labview?

I have to send UDP multicast and Unicast messages to a remote port from a single source/local port. I tried by opening UDP unicast and multicast in the same port and got the expected error. I tried by opening a unicast connection and sending unicast messages.After that when multicast messages has to send I closed unicast and opened multicast in the same port.This is not throwing any error. But my requirenment is to comminicate with another application in C ++ which recieves this data, throwing an error of lost connectivity and both the applications are not abled to communicate properly.
In the other application with C++ this is implemented using port sharing. So how port sharing can be implemented in labview so that I can send both multicast and unicast messages from the same port?
Thanks in advance

UDP is a sessionless protocol, meaning that anyone listening on the specified port CAN receive the data. CAN because as you noted there is no guarantee in the protocol that it will be received. And if you send the data not to a specific address but a multicast address not only one computer can receive it but in fact every computer on the same subnet listening to that multicast address and depending on the TTL of the packet also computers in neighbouring subnets, although that last one is not a very reliable operation since routers can be configured to drop multicast packages anyhow despite of a different TTL saying otherwise.
Accordingly there is no real way to make sure that a receiving UDP port is not already in use, since you don't build up a connection. UDP is more or less analogous to shouting your messages through a megaphone, and anyone listening on the right frequency (port) can hear it. You do bind the sender socket to a specific port number but that makes little difference.
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Slowing down or speeding up music?

Iv tried numerous times to to slow down or speed up music, I assumed it was changing the tempo but that didnt work and now im at a loss of what to do, can someone help???

I do not understand how you are not getting results after adjusting the tempo in Master track. I do it all the time to listen to note lineup and such. Go to Master Track, look for tempo and either adjust the slider or highlight the actual numerical tempo and type a new tempo setting. This will speed up or slow down the recorded material.

Slow firewire 800 speeds on early 2008 macbook pro 17"

I've got an early 2008 macbook pro 17". I'm transferring files between a WD mybook studio II (2TB) configured as raid-1 to a sata dock with a seagate 1TB drive daisy-chained over firewire 800. both 1TB drives in the WD mybook and the 1TB seagate in the sata dock are 7.2k rpm. I'm running a block-level clone FROM the mybook TO the seagate using Carbon Copy Cloner which i would think would be the fastest real-world test i could do. I'm getting pegged speeds of 40MB/s. This is on par with other regular read/write speeds i've noticed in the past. this seems way off. to remove variables i unplugged my two firewire 400 drives (as i've heard that may slow things down, even though they're not doing anything during the clone) and it SLOWED DOWN the fw800 clone to 38MB/s ! plugging the two firewire 400 drives back in during the clone brought the speeds back up to 40MB/s. i don't have a unibody 2009 mbp that had the firewire issues.
1) HDD's should read at 70-80MB/s and at least write at 59 MB/s, why am i not getting that using firewire 800 and two 7200 rpm drives ?? (i know the wd mybook is raid-1 but i'm reading from it...shouldn't effect read performance)
2) (less important) why on earth would having two firewire 400 drives plugged in and inactive make the firewire 800 transfer speeds go up/down 2MB/s
i'm willing to experiment with anyone's suggestions. huge thanks in advance.

i have a similar problem.
i have a new seagate freeagent 1tb drive w/FW800, FW400 and USB2.0 ports, and its connected via the FW800 port/cable to my macbook pro, and read/write speeds are really slow, particularly read speeds.
i'm currently working on an audio project with around 15 audio tracks running at once, and it chokes the drive ('HD overload' errors), so i've done some benchmark testing using Drive Genius and Xbench. the results show that the drive is averaging around 12mb/s read speed, and around 26mb/s write speed. grim.
i tried the drive with the FW400 connection on my missus' old imac g5, and its much faster than my mbp's FW800 connection, so i decided to try the drive back on my machine with OSX booted in Safe mode, and benchmark it again. the results are massively different; the FW800 connection is very fast (as you'd expect).
both the tests were done with all my peripherals attached (usb hub, ethernet cable, usb2 ext. drive) so i don't think the problem is with those.
what i'm wondering is if there are any known system extensions that can screw with the FW bus speeds? if not, any pointers as to where i should start troubleshooting?
many thanks!

SuperDrive slow Data Transfer Speeds

I have several home movies DVDs I would like to loadback onto my mid-2011 27" iMac but it is taking for ever to complete the transfer. One DVD disk takes 6 hours because the transfer speed is crawling. I read up onthis and info says my HL-DT-STDVDRW GA32N (FirmwareVersion KE06) is made by HLDS and they have implemented riplock which slows the data speed way down to preserve SuperDrive life expectancy anddecrease noise level. How can I disable this riplock to restore the data speed. I bought this fast/expensive machine and the SuperDrive of all things is slowing medown. Completely unacceptable.

I was having a problem ripping store bought CD's to ITunes and opened a case with Apple for suspected hardware issue. Turns out the problem was Norton AntiVirus by Symantec which was blocking my external drives. Even though the CD is internal it was killing it. Once I shut off Norton everthing started working.
The way I came to figure out it was a Software and not hardware issue was that the Superdrive worked perfectly under Windows 7 inside of VMWare Fusiion.
If you have any sort of AntiVirus, try shutting and down and using the Superdrive.
My machine is the same , late 2011 with Firmware KE06

UDP MultiCast on cFP

I am attemtping to write an application for the cFp 2120 that uses UDP multicast. I developed it mostly on my PC and was surprised to find it not supported on cFP once I downloaded it for the first time. I have searched for information on this and can't find much. I found in one post that the I should use UDP Broadcst instead of multicast but there is no UDP Broadcast vi. Is the standard UDP read and write whatthey are refering to? Is this truely not available?
Thank you for your help.

Hi GeneHancock,
UPD is supported on cFP. It is lossy. There are other methods of communication detailed here. Can you clarify what you mean by unsupported? Did you install all the drivers onto your FieldPoint as well?
Regards,
Hillary E
National Instruments

Slowing the Particle Speed in After Effects Particle World?

Hi folks, does anyone know if there is a way to slow down the line particle speed in after effects?
I've already tried the Velocity and Gravity but these affect the shape and projectory of the particles, I'd like to just slow down the speed?
Thanks

There are other particle systems that offer more control if you really need it. Expensive.
Build your main comp at a higher frame rate, render the movie, and bring it back into a 30fps comp. You can precompose and nest but the movie is generally easier to manage in your head. The highest frame rate I can use on my AE is 99fps. A more current version may offer higher frame rates.

Is UDP Multicast support in LV RT 8.6?

Is UDP Multicast supported in LabVIEW Real-Time 8.6?

No, this is definitely not "normal", it's an unfortunate example of mis-tagging the example VIs. VIs are tagged in a number of different ways in the example finder, the ones you mostly see are:
1. Written specifically for RT
2. Written specifically for LabVIEW (Host)
3. Written for LabVIEW but could still work on RT.
The multicast examples were tagged with the "Written for LabVIEW but could still work on RT" when they should have been tagged, "Written specifically for LabVIEW (Host)." We apologize for any confusion, we'll try to make sure this is fixed in the next release of LabVIEW.
-Danny

UDP multicast subscriber for RT using CVI 8.5

Does anyone know of a way to implement a UDP multicast subscriber on an RT system using CVI 8.5? I know that CVI 2009 supports UDPMulticastSubscribe/UDPMulticastUnsubscribe functions, but I'd rather not upgrade if I can avoid it.
Can this be done using the Windows SDK? Is it even possible?
--NDo
Solved!
Go to Solution.

The reason that the CVI library multicast functions weren't supported until version 2009 is that the underlying Windows SDK implementation provided by LabVIEW Real-Time did not support UDP multicast. This means that unless you have LabVIEW Real-Time 2009 on the system, multicast is impossible. It might be possible to install LVRT 2009 and use the Windows SDK directly, without upgrading to CVI RT 2009. I have not tried this, though, so I can't guarantee you won't run into problems.
Mert A.
National Instruments

UDP/Multicast Broadcasts

Hello,
I am interested in writing some P2P-ish type networking
applications which need to use UDP multicasting to discover other
participating hosts on the network. Does AS3 networking libraries
have the ability to do UDP and multicasting?
Thanks,
Brad

If you want the UDP connection to have multiple listeners:
- Open the file: LabVIEW.ini (it is most likely located in C:\Program Files\National Instruments\LabVIEW 7.x, where "x" is the version number.)
- Add the line: SocketSetReuseAddr=TRUE
- Restart LabVIEW. The changes should take effect.
If you do not want to have multiple listeners, but want to be able to have multiple writers to the same port, this does not apply. You can open different local ports so as not to generate Error 60 and then write to the same remote port without causing an error.
If you are trying to communicate with multiple devices using the LabVIEW UDP VIs where each device has a unique IP addresses that are both listening on the same port in parallel, you can do the following:
This error occurs because you cannot open multiple connections on the same local port. However, the local port and the remote port do not need to be the same. The local port is determined by the "port" inputs of the UDP Open VIs. The remote port is determined by the "port" inputs of the UDP Write VIs. For each write, set the remote port to the one on which the corresponding device is listening.
I would also recommend that you look at the following link:
http://zone.ni.com/devzone/conceptd.nsf/webmain/BB41313D7AB28CBD86256802007B8DC5?opendocument
Nandini Subramaniam
Applications Engineer
National Instruments

Slow fios upload speeds in northern NJ

I have 50/50 internet but the upload speed is extremely slow. Download speeds are usually somewhere between 50-60 mbps any time during the day. Upload speeds are around 30 mbps during the mornings and in the evenings it gets as low as 5 mbps.
They replaced the box outside, inside, and also the modem...Still the same thing. The upload speed seems very consistent everyday being faster in the morning and slowing down in the evenings.
Is the service in my area oversold? The only time I got 50 mbps upload speeds was on new years day(morning).
Verizon shouldn't advertise that upload speeds is the same as download.

Well, then I'm not sure what you expect to get from posting here. In case you didn't notice, you're talking to peers here. There are a bunch of network savvy folks here, but we can't help you if you don't give us details. We only know what you tell us, nothing more. if you're convinced the problem is in Verizon's network, then there is nothing we other users can do for you.
I suggest you try some large file transfers as well. Speedtest sites are very useful tools, but sometimes real world testing is important too. Some quick tests could be uploading movies to FaceBook or YouTube. If you have other well connected servers you can use, try them too.
Remember that the Internet is ultimately a shared medium, regardless of what Verizon's marketing department says. If you're testing through links that are loaded, then speed will drop. Using other servers and test sites will help determine if some links are busier than others.
Enjoy.
If a forum member gives an answer you like, give them the Kudos they deserve. If a member gives you the answer to your question, mark the answer as Accepted Solution so others can see the solution to the problem.

HT3176 How can the slow motion playback speed be adjusted on Apple TV (pause and clicking right/left)?

I am looking to adjust the paused slow motion playback speed of Apple TV. On one of my Apple Tv's when paused I can click right or left to view tv in frame advance (or one second advance) on a different Apple TV there does not appear to be any advance even after multiple clicks. But, it will jump 10 seconds when paused and left or right is held down as it should.
Third gen. (A1427) Apple TV Software version on both 7.0.3

Unfortunately with that speed you are not going to have a good experience with HD streaming. I would make sure everything is set to stream SD. Go into the settings - iTunes Store and you can switch there for any purchases/rentals made through them.
If you use Netflix (or other streaming sites) go into your account(s) and see if you can switch to a lower quality stream. I know Netflix has that in place.

WRT54GS slow UDP multicast speed

Similar Messages

Maybe you are looking for