Hi Vlad,
Thanks for the quick reply. The kernel version we are using is
2.6.23.1-42.fc8
Thanks,
Brandon Moreno
Ericsson BCAM
(972)684-1791 esn x444-1791
The author works for Telefonaktiebolaget L M Ericsson ("Ericsson"), who
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-----Original Message-----
From: Vlad Yasevich [mailto:vladislav.yasevich@xxxxxx]
Sent: Monday, February 22, 2010 1:42 PM
To: Moreno, Brandon ERICSSON (RICH2:MX15)
Cc: linux-sctp@xxxxxxxxxxxxxxx
Subject: Re: Fast Retransmission Settings
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
>
> The author works for Telefonaktiebolaget L M Ericsson ("Ericsson"),
> who is solely responsible for this email and its contents. All
> inquiries regarding this email should be addressed to Ericsson. Nortel
> has provided the use of the nortel.com domain to Ericsson in
> connection with this email solely for the purpose of connectivity and
> Nortel Networks has no liability for the email or its contents. The
> web site for Ericsson is www.ericsson.com <http://www.ericsson.com/>
."
>
>
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