Thanks Vlad, Will try and let you know. There seems to be one issue in 2.6.32 where netstat shows sctp socket in CLOSE state and it never cleans up. Rebooting m/c does solve the problem. Thanks Upma On Thu, Mar 21, 2013 at 6:54 PM, Vlad Yasevich <vyasevich@xxxxxxxxx> wrote: > On 03/21/2013 03:38 AM, upma gandhi wrote: >> >> Hi Vlad, >> I understand that SCTP_MIB_OUTSCTPPACKS is just for SCTP level stats. >> But in route module, when a packet( SCTP) is send out for some >> neighbor, we must be updating "used" variable with 'jiffies' and >> which should not let ARP expiry timer kick in ? or is it that dst at >> SCTP layer doesn't match exactly to neighbor maintained at ARP layer ? >> I am asking all this for my understanding, pls. let me know if there >> is any document which talks about SCTP linux implementation. > > > The MIB attribute is just that. It is used in the SNMP MIB. > > The solution is for SCTP to call the proper dst/route code when the time is > right. Essentially, when SCTP determines that is has made forward progress > in the connection, it can call dst_confirm(). > > I am attaching a patch that does this, but I have not tested it yet. > Give it a try and let me know if it works for you. > > -vlad > >> >> Thanks >> Upma >> >> >> On Wed, Mar 20, 2013 at 6:10 PM, Vlad Yasevich <vyasevich@xxxxxxxxx> >> wrote: >>> >>> On 03/20/2013 06:40 AM, upma gandhi wrote: >>>> >>>> >>>> Hi Vlad, >>>> I am using linux kernel 2.6.32 and wondering if the fix you are >>>> referring is after that ? >>>> I would like to know if MIB variable SCTP_MIB_OUTSCTPPACKS is picked >>>> up by ICMP to figure out if neighbour is stale/unreachable/delay etc. >>>> ? Can you pls. point me to variable which is being set by SCTp on >>>> successful packet out and pickup by ARP to figure out if resolution is >>>> required or not ? I am sorry for writing personal mail but I am in >>>> need of solution faster. >>> >>> >>> >>> I just checked, and we don't appear to have this fix. Let me see if I >>> can >>> cook something up for you to test. >>> >>> -vlad >>> >>>> >>>> Thanks >>>> Upma >>>> >>>> On Tue, Mar 19, 2013 at 5:37 PM, Vlad Yasevich <vyasevich@xxxxxxxxx> >>>> wrote: >>>>> >>>>> >>>>> On 03/19/2013 05:03 AM, upma gandhi wrote: >>>>>> >>>>>> >>>>>> Hello All, >>>>>> I have one basic SCTP client and server ( having single network >>>>>> connection) and client is continuously sending data to server every 1 >>>>>> second. I am seeing that server is sending ARP request every 20 >>>>>> seconds or so ( see below logs) for client IP address. If I use TCP >>>>>> client/ server instead of SCTP, I see that ARP request is being sent >>>>>> every 4 minute. Can somebody clarify why its happening or if my >>>>>> observation is wrong ? >>>>> >>>>> >>>>> >>>>> There was an old bug that SCTP didn't update the route forward progress >>>>> thus causing NUD to kick in even though reachability was configured >>>>> through SCTP. I thought it was fixed a long time ago. Which kernel >>>>> version are you using? >>>>> >>>>> -vlad >>>>> >>>>>> >>>>>> Thanks >>>>>> >>>>>> >>>>>> >>>>>> ------------------------------------------------------------------------------ >>>>>> Everyone hates slow websites. So do we. >>>>>> Make your web apps faster with AppDynamics >>>>>> Download AppDynamics Lite for free today: >>>>>> http://p.sf.net/sfu/appdyn_d2d_mar >>>>>> _______________________________________________ >>>>>> Lksctp-developers mailing list >>>>>> Lksctp-developers@xxxxxxxxxxxxxxxxxxxxx >>>>>> https://lists.sourceforge.net/lists/listinfo/lksctp-developers >>>>>> >>>>> >>>>> >>>>> >>>>> >>>>> ------------------------------------------------------------------------------ >>>>> Everyone hates slow websites. So do we. >>>>> Make your web apps faster with AppDynamics >>>>> Download AppDynamics Lite for free today: >>>>> http://p.sf.net/sfu/appdyn_d2d_mar >>>>> _______________________________________________ >>>>> Lksctp-developers mailing list >>>>> Lksctp-developers@xxxxxxxxxxxxxxxxxxxxx >>>>> https://lists.sourceforge.net/lists/listinfo/lksctp-developers >>> >>> >>> > -- To unsubscribe from this list: send the line "unsubscribe linux-sctp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
