On 07/13/2013 09:17 PM, Ben Greear wrote: > On 07/13/2013 01:29 AM, jagdish.motw...@elitecore.com wrote: >> Yes John, >> When i do the ping request, i can see the 2 ip fragments. Its the >> ping reply that is dropped by my igb interface. > > Is the replay also 2 packets? If not, the peer machine may have wrong > MTU. > > Thanks, > Ben > You are right Ben. Peer machine has MTU=1500 greater than my MTU=1000.
So the reply is a single packet (which is bigger than my MTU). My problem is : By setting an MTU of 1000, my igb device drops all received packet having length more than 1000 However e1000e allows me to receive such packets. Regards, Jagdish Motwani >> >> Regards, >> Jagdish Motwani >> >>> BTW, this is in reference to using ping with larger sized frames. >>> >>> Cheers, >>> John >>> >>> >>>> -----Original Message----- >>>> From: Ronciak, John [mailto:john.ronc...@intel.com] >>>> Sent: Friday, July 12, 2013 9:40 AM >>>> To: Jagdish Motwani; e1000-devel@lists.sourceforge.net >>>> Subject: Re: [E1000-devel] igb: cannot receive packets bigger than mtu >>>> >>>> Yes the patch is still needed. Setting the MTU smaller than a normal >>>> packet will cause the frame to be IP fragmented. So you should be >>>> seeing at least 2 packets on the wire being IP fragments. Use >>>> wireshark (or something similar) to make sure those packets make it to >>>> on to the wire. >>>> >>>> Cheers, >>>> John >>>> >>>> >>>>> -----Original Message----- >>>>> From: Jagdish Motwani [mailto:jagdish.motw...@elitecore.com] >>>>> Sent: Friday, July 12, 2013 1:57 AM >>>>> To: e1000-devel@lists.sourceforge.net >>>>> Subject: [E1000-devel] igb: cannot receive packets bigger than mtu >>>>> >>>>> Hi list, >>>>> I am facing a strange issue with igb driver. >>>>> >>>>> If i set my mtu to 1000, then ping -s 1200 does not work. (the >>>>> same thing works with e1000e interface) >>>>> >>>>> On further debugging, i reached >>>>> >>>> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/? >>>> >>>>> id=ec54d7d6e40b04c16dfce0e41e506198a20c8645 >>>>> >>>>> Reverting the patch, i was able to ping. >>>>> >>>>> The commit message states that it is a fix for skb_over >>>>> panic. Is >>>>> this fix still required? >>>>> >>>>> Regards, >>>>> Jagdish Motwani >>>>> >>>>> --------------------------------------------------------------------- >>>> - >>>>> - >>>>> ------- >>>>> See everything from the browser to the database with AppDynamics Get >>>>> end-to-end visibility with application monitoring from AppDynamics >>>>> Isolate bottlenecks and diagnose root cause in seconds. >>>>> Start your free trial of AppDynamics Pro today! >>>>> >>>> http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.c >>>>> l >>>>> ktrk >>>>> _______________________________________________ >>>>> E1000-devel mailing list >>>>> E1000-devel@lists.sourceforge.net >>>>> https://lists.sourceforge.net/lists/listinfo/e1000-devel >>>>> To learn more about Intel® Ethernet, visit >>>>> http://communities.intel.com/community/wired >>>> >>>> ----------------------------------------------------------------------- >>>> >>>> ------- >>>> See everything from the browser to the database with AppDynamics Get >>>> end-to-end visibility with application monitoring from AppDynamics >>>> Isolate bottlenecks and diagnose root cause in seconds. >>>> Start your free trial of AppDynamics Pro today! >>>> http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.cl >>>> >>>> ktrk >>>> _______________________________________________ >>>> E1000-devel mailing list >>>> E1000-devel@lists.sourceforge.net >>>> https://lists.sourceforge.net/lists/listinfo/e1000-devel >>>> To learn more about Intel® Ethernet, visit >>>> http://communities.intel.com/community/wired >>> >> >> >> ------------------------------------------------------------------------------ >> >> >> See everything from the browser to the database with AppDynamics >> Get end-to-end visibility with application monitoring from AppDynamics >> Isolate bottlenecks and diagnose root cause in seconds. >> Start your free trial of AppDynamics Pro today! >> http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk >> >> _______________________________________________ >> E1000-devel mailing list >> E1000-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/e1000-devel >> To learn more about Intel® Ethernet, visit >> http://communities.intel.com/community/wired >> > > ------------------------------------------------------------------------------ See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
