From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcelo Ricardo Leitner Date: Wed, 27 Jan 2016 16:02:28 +0000 Subject: Re: Query on SCTP:INIT re-transmission interval behavior Message-Id: <20160127160228.GA6604@mrl.redhat.com> List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-sctp@vger.kernel.org Hi, On Wed, Jan 27, 2016 at 03:36:11PM +0000, Ravi Puttachannaiah wrote: > Hi, > > We are using LKSCTP version 1.0.16 and have configured the SCTP configuration parameters as follows: Okay but in the end who will do the actual handling of the retransmission is the kernel. Which kernel are you using? > SctpInitMaxAttempts : 10 > SctpInitRTO : 3000 > SctpMinRTO : 1000 > SctpMaxRTO : 60000 > > We observed that SCTP:INIT re-transmission is occurring at interval 6,12,24.., 6,12,24.., 6,12,24....... As per our understanding re-transmission should occur at interval 3,6,12,24..., 3,6,12,24...3,6,12,24... since SctpInitRTO000. > > Could you please let us know if it is an expected behavior or not. Also why re-transmission interval is not started with 3,6,12,24... That's my understanding too, 3, 6, 12.. How many transports do you have? Marcelo