From: Vlad Yasevich <vladislav.yasevich@hp.com>
To: linux-sctp@vger.kernel.org
Subject: Re: Fast Retransmission Settings
Date: Mon, 22 Feb 2010 19:42:29 +0000 [thread overview]
Message-ID: <4B82DE25.8070103@hp.com> (raw)
In-Reply-To: <4620668FFAA3D5458A691287D9DDAD11071917E6@zrtphxm2.corp.nortel.com>
Brandon Moreno wrote:
> Hi,
>
> I have a general question about lksctp's fast retransmit implementation.
>
>
> I am currently using lksctp-tools-1.0.6-1.i386.rpm on my server side.
> After setting up an sctp connection, I am seeing proper messaging while
> we run various messages over the SCTP stream. The issue that I am seeing
> is when a packet is lost in the network. Presently, when a TSN is lost
> on our client side, it starts transmitting sack messages with gap
> reports. The server side is receiving the gap sack messages, however it
> is not retransmitting the packet until the rto timer expires. Since the
> rto timer increases, eventually the whole sctp association is going down
> when too many gap reports are received without a retransmission.
>
> I am curious why we are not seeing fast retransmit after 4 gap reports
> are received. Is there some setting that will affect fast retransmit
> being on or off?
No, but there might be a bug in the kernel you are using. Which kernel
version are you using on the server?
-vlad
>
> Thanks,
> Brandon Moreno
> Ericsson BCAM
> (972)684-1791 esn x444-1791
>
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next prev parent reply other threads:[~2010-02-22 19:42 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-22 19:29 Fast Retransmission Settings Brandon Moreno
2010-02-22 19:42 ` Vlad Yasevich [this message]
2010-02-22 20:11 ` Brandon Moreno
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