Packet loss in a bridge
Hi All, I have created a bridge on two nics on the same machine. The machine having a bridge is an intermediate machine to send packets across network. I am seeing much packet loss in the intermediate machine (i think due to bridge brctl) How to avoid it? Thanks Anil ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Packet loss in a bridge
On Wed, Nov 6, 2013 at 1:56 AM, Anil Joshi aj27...@gmail.com wrote: Hi All, I have created a bridge on two nics on the same machine. The machine having a bridge is an intermediate machine to send packets across network. I am seeing much packet loss in the intermediate machine (i think due to bridge brctl) How to avoid it? Thanks Anil Could be anything kernel traffic control, too many iptables rules (AFAIK, too many iptables could slow down packet processing, thus can not cope with high burst) etc. I think better run tcpdump and save the result as pcap. Then load it in latest Wireshark. Maybe you can get better clues there. -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Packet loss in a bridge
I have stopped the iptables and ip6tables service. No rules are loaded in the machine. On Wed, Nov 6, 2013 at 10:44 AM, Mulyadi Santosa mulyadi.sant...@gmail.comwrote: On Wed, Nov 6, 2013 at 1:56 AM, Anil Joshi aj27...@gmail.com wrote: Hi All, I have created a bridge on two nics on the same machine. The machine having a bridge is an intermediate machine to send packets across network. I am seeing much packet loss in the intermediate machine (i think due to bridge brctl) How to avoid it? Thanks Anil Could be anything kernel traffic control, too many iptables rules (AFAIK, too many iptables could slow down packet processing, thus can not cope with high burst) etc. I think better run tcpdump and save the result as pcap. Then load it in latest Wireshark. Maybe you can get better clues there. -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
RE: Fwd: Packet Loss (Robert Clove)
Hi Robert, You can write your own kernel (using netfilter framework) module to count the number of packets received at kernel. And, with this kernel module you can have the flexibility of filtering the packets you are sending from packeth. Thanks Regards Murali --- Date: Sat, 2 Nov 2013 07:28:24 -0700 From: Robert Clove cloverob...@gmail.com Subject: Fwd: Packet Loss To: kernelnewbies kernelnewbies@kernelnewbies.org Message-ID: CAEMktPXwKMEEuds9syAV4Y7DzHPQQnVoiaHMC2L=evtj6up...@mail.gmail.com Content-Type: text/plain; charset=iso-8859-1 On Mon, Oct 28, 2013 at 5:44 PM, Kristof Provost kris...@sigsegv.be wrote: On 2013-10-28 17:32:43 (+0530), Robert Clove cloverob...@gmail.com wrote: Kind of Packets :- *UDP* How are you generating them? :-* Packeth ( http://packeth.sourceforge.net/packeth/Home.html)* kernel version : uname -r - *2.6.32-358.18.1.el6.x86_64 * Are you *SURE* you're sending 1000? - *ya checked through packeth status bar and also through ifconfig command* I have connected them through LAN cable (cat 6) back to back. Changed cable but no use. What should i do? Break down the problem. Get that smart switch to tell you if the packets are lost by the sender of the receiver. Test if it's bidirectional (i.e. does it still happen if the switch the sender and receiver)? Does it still happen if you send only 100 packets? Do you still lose 30% then, or do you lose more or less? Perhaps try a kernel that isn't nearly five years old too. Also, don't top-post. Regards, Kristof Hey Sir, I just want to know are there any driver or kernel parameters that we can adjust to get the better packet capture? Thanks -- next part -- An HTML attachment was scrubbed... URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20131102/08d14366/attachment-0001.html ::DISCLAIMER:: The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. E-mail transmission is not guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or may contain viruses in transmission. The e mail and its contents (with or without referred errors) shall therefore not attach any liability on the originator or HCL or its affiliates. Views or opinions, if any, presented in this email are solely those of the author and may not necessarily reflect the views or opinions of HCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of authorized representative of HCL is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. Before opening any email and/or attachments, please check them for viruses and other defects. ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Fwd: Packet Loss
On Mon, Oct 28, 2013 at 5:44 PM, Kristof Provost kris...@sigsegv.be wrote: On 2013-10-28 17:32:43 (+0530), Robert Clove cloverob...@gmail.com wrote: Kind of Packets :- *UDP* How are you generating them? :-* Packeth ( http://packeth.sourceforge.net/packeth/Home.html)* kernel version : uname -r - *2.6.32-358.18.1.el6.x86_64 * Are you *SURE* you're sending 1000? - *ya checked through packeth status bar and also through ifconfig command* I have connected them through LAN cable (cat 6) back to back. Changed cable but no use. What should i do? Break down the problem. Get that smart switch to tell you if the packets are lost by the sender of the receiver. Test if it's bidirectional (i.e. does it still happen if the switch the sender and receiver)? Does it still happen if you send only 100 packets? Do you still lose 30% then, or do you lose more or less? Perhaps try a kernel that isn't nearly five years old too. Also, don't top-post. Regards, Kristof Hey Sir, I just want to know are there any driver or kernel parameters that we can adjust to get the better packet capture? Thanks ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Packet Loss
Hi All, I am pumping an 1000 packets at 1Gbps and receiving on 300 packets on the other side. Both the servers are back to back connected. Please guide me what to do. Both the servers are high end. Thanks ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Packet Loss
On 2013-10-28 17:32:43 (+0530), Robert Clove cloverob...@gmail.com wrote: Kind of Packets :- *UDP* How are you generating them? :-* Packeth ( http://packeth.sourceforge.net/packeth/Home.html)* kernel version : uname -r - *2.6.32-358.18.1.el6.x86_64 * Are you *SURE* you're sending 1000? - *ya checked through packeth status bar and also through ifconfig command* I have connected them through LAN cable (cat 6) back to back. Changed cable but no use. What should i do? Break down the problem. Get that smart switch to tell you if the packets are lost by the sender of the receiver. Test if it's bidirectional (i.e. does it still happen if the switch the sender and receiver)? Does it still happen if you send only 100 packets? Do you still lose 30% then, or do you lose more or less? Perhaps try a kernel that isn't nearly five years old too. Also, don't top-post. Regards, Kristof ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
