October 2009 - Udpcast

castomize udpcast iso image
by Gianluigi Autuori 17 Jul '11

17 Jul '11

I want to use Udpcast from iso image in this scenario: - first pc boots from udpcast iso image -second pc boots from ethernet using pxe that sends him udpreceiver How can I do it? thanks

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Udpcast for streaming data.
by Jorge Muñoz Castañer 31 Dec '09

31 Dec '09

Hi list, I was looking for a tool to send a stream of data with FEC where the client/receiver can connect even if the stream has yet begun. I haven't found anything but Udpcast that can do anything similar. I think that maybe an "streaming" option can be added so the sender sends Hello packets at the end of a block of slices+FEC so a receiver can hook to the UDP stream. What do you think about this? Can this be made modifying Udpcast without broken it all? Is there another software that I can use? Greetings, Jorge M -- --------------------------------------- Jorge Muñoz Castañer e-mail: jorgem(en)det.uvigo.es Grupo de Tecnologías de la Información Departamento de Ingeniería Telemática Universidad de Vigo ETSI Telecomunicación Campus 36310 Vigo SPAIN ----------------------------------------

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Network card Error
by Darin MacLachlan 30 Dec '09

30 Dec '09

This was working and now it has stopped. Have a UDPcast server running on a HP DL360G5 with 4 NICS. One connected to an internal infrastructure (eth2) and another connected to a dedicated switch with the client systems on the same switch (eth3). When i run the UDPcast send or receive, using the following command: udp-sender -f /home/base.udpc --interface eth3 --point-to-point --full- duplex --max-bitrate 600m --nokbd --portbase=9922 --min-receivers 1 -- rexmit-hello-interval 5000 --max-wait 300 I get the following error message: Udp-sender 2007-03-23 No suitable network interface found The following interfaces are available: lo 127.0.0.1 eth2 10.46.0.251 eth2:1 10.46.0.1 Interestingly, an ifconfig show eth3 as a valid network adapter, but the udp-sender does not see the device. This was working last week, and nothing has changed on the server I have tried everything, restarting DHCP, removing the interface and adding again. Rebooted the server, restarted the network stack manually. nothing seems to help. Using SUSE linux 10 as the base server OS.

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unicast with async
by Justin Lipman 29 Dec '09

29 Dec '09

Hi folks, I'd like to use udp-sender with async and a unicast address instead of multicast so that unicast at the MAC layer is actually used. Ive tried using the pointopoint switch, but I get the message "pointopoint mode set, and 0 participants instead of 1". Is there a way to do this with udpcast? Thanks kindly. J

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SATA driver
by Bert Van Vreckem 30 Nov '09

30 Nov '09

Hello, I'm trying to build a UDPCast image for a classroom of Dell Optiplex 760 machines. This machine has SATA drives that need the ata_generic and pata_acpi kernel modules. These don't appear in the menu, but apparently the actual modules are included in the standard ISO image. How can I get the correct modules loaded? Cheers, bert

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UDP Cast ready-made boot images and i686 issues
by Henrique Rodrigues 03 Nov '09

03 Nov '09

Hello, I've been using UDP Cast extensively for a while now and I love it, but I had an issue last week and I want to share it witou you. The UDP Cast website provides handy ready-made boot images. Apparently, those images are compiled for i686 and I couldn't make them work on an older machine because the processor doesn't implement the CMOV operation. The problem seem to belong to GCC, because it thinks that every i686 processor implements the optional CMOV operation, which is not true. I solved the problem by compiling my own UDP Cast kernel, but I suggest that the next UDP Cast ready-made boot images drop the i686 requirement and stick to i386, for compatibility reasons. Is this a reasonable request? Thank you and best regards, Henrique Rodrigues -- Henrique Rodrigues http://sodki.org Engenharia Informatica e de Computadores - Instituto Superior Tecnico

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Creating files within dhcp.script
by Jens Breuer 03 Nov '09

03 Nov '09

Hello List, hello Alain, I am playing around with the "udpcast image generator" and I need to store the next-server address in the filesystem for later processing. I am using kernel-udpcast_2.6.30-rc5_all.deb and udpcast-mkimage_20081213_all.deb. This is what my dhcp.script looks like: === snip === #!/bin/sh [ -n "$broadcast" ] && BROADCAST="broadcast $broadcast" [ -n "$subnet" ] && NETMASK="netmask $subnet" case "$1" in deconfig) /sbin/ifconfig $interface 0.0.0.0 ;; renew|bound) /sbin/ifconfig $interface $ip $BROADCAST $NETMASK /sbin/echo $siaddr > /etc/server.ip ;; esac === snap === This works as expected when generating cd-images. If I generate a initrd and boot via PXE, the file /etc/server.ip never gets created. I tried to create the file in many places (/tmp, /sbin, etc.) but it doesn't work. Is there something important that I am missing? I thought that there is no difference between a cd-image and a plain initrd (besides syslinux/pxelinux and the kernel being separate). Additionally FYI, when using the latest kernel and mkimage I get some weird behaviour. I use VirtualBox 2.2 for testing purposes and both cd-image and initrd crash the VM when trying to write to the filesystem from within dhcp.script. Any help/suggestion is much appreciated. Thanks in advance. Regards Jens

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Adding a no receiver timeout
by David Margetts 1 03 Nov '09

03 Nov '09

Hello, I am having quite a lot of success with udp-cast, it is proving to be very useful in shifting large hard disk images across the network. If there is a chance of new features, one I would like to see is the ability to set a time-out if no receivers connect to the sender in a given amount of time. I am using it for imaging notebooks and once I have done a set, I move on to a different image. It would be nice if it would quit after a day of being idle. Many Thanks, David ____________________________________________________________________ You might be interested in this... RM Technical Seminars - Autumn 2009 Coming to a venue near you from 2nd November to 4th December. Book your place now... http://www.rm.com/technicalseminars ____________________________________________________________________ P.S. Think Green - don't print this email unless you really need to. This message is confidential, so please treat it appropriately and for its intended purpose only. In particular, if it refers to any technical data, terms or prices not generally available or known, such items are "commercially sensitive information" within the terms of the Freedom of Information Act 2000 and related laws. As it would be prejudicial to RM's commercial interests if these were disclosed, please refrain from doing so. As Internet communications are not secure, please be aware that RM cannot accept responsibility for its contents. Any views or opinions presented are those of the author only and not of RM. If you are not the intended recipient of this e-mail, please accept our apologies and arrange for copies of it to be deleted. For your information, RM may intercept incoming and outgoing email communications. RM Education plc Registered Office: New Mill House, 183 Milton Park, Abingdon, Oxfordshire, OX14 4SE, England Registered Number: 1148594

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problem with AMD Geode CS5536A
by Autuori Gianluigi 19 Oct '09

19 Oct '09

Hi, I have an embedded system with this controller: AMD Geode CS5536A, so I have selected pata_cs5536: low-level driver for the CS5536 IDE controller, but after boot I can't see any disk and I see this error: "pata_cs5536: disabled by BIOS" Can you help me? best regards Gianluigi Autuori -------------------------------------------------------------------------------- Questo messaggio e-mail e ogni documento ad esso eventualmente allegato puo' avere carattere riservato ed essere tutelato da segreto. Esso,comunque, e' ad esclusivo utilizzo del destinatario in indirizzo. Qualora non foste il destinatario del messaggio vi preghiamo di volerci avvertire immediatamente per e-mail o telefono e di cancellare il presente messaggio e ogni eventuale allegato dal vostro sistema. E' vietata la duplicazione o l'utilizzo per qualunque fine del messaggio e di ogni allegato, nonche' la loro divulgazione, distribuzione o inoltro a terzi senza l'espressa autorizzazione del mittente. In ragione del mezzo di trasmissione utilizzato, il mittente non assume alcuna responsabilita' sulla segretezza/riservatezza delle informazioni contenute nel messaggio e nei relativi allegati. This e-mail and any file transmitted with it may contain material that is confidential, privileged and/or attorney work product for the sole use of the intended recipient. If you are not the intended recipient of this e-mail, please do not read it, notify us immediately by e-mail or by telephone and then delete this message and any file attached from your system. You should not copy or use it for any purpose, disclose the contents of the same to any other person or forward it without express permission. Considering the means of transmission, we do not undertake any liability with respect to the secrecy and confidentiality of the information contained in this e-mail and its attachments.

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performance problem
by motchane＠iut-orsay.fr 10 Oct '09

10 Oct '09

Hello, I have a performance problem with udpcast : - when I send data from one machine s to 2 machines r1 and r2 (all are connected with the same switch, all 1000M network card) with : udp-sender --full-duplex --min-clients 2 --max-wait 300 --interface eth0 --mcast-all-addr 224.0.0.1 --portbase 2232 --ttl --file /home/test udp-receiver --mcast-all-addr 224.0.0.1 --portbase 2232 --ttl 1 > /dev/null I have a bit rate of 9.47 Mbps. -when I send data from s to either r1 or r2 with the same commands, I obtain 945.55 Mbps ! I use the last version of udpcast (udpcast-20090920) and Debian Lenny. Do you have any idea of why and how to solve this ? Regards,

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