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Re: [SCTP-Discussion] SCTP failover (path changeover) problem


Chronological Thread 
  • From: Michael Tuexen <Michael.Tuexen AT micmac.franken.de>
  • To: Shefiroth Tsai <shefiroth AT gmail.com>
  • Cc: discussion AT sctp.de
  • Subject: Re: [SCTP-Discussion] SCTP failover (path changeover) problem
  • Date: Thu Nov 3 09:02:02 2005
  • List-id: SCTP Discussions <discussion.sctp.de>
Hi,

can you provide a message trace in libpcap format for both networks?

Best regards
Michael

On Nov 3, 2005, at 3:18 AM, Shefiroth Tsai wrote:

Hi,

I have implemented a program using the sctplib to test the time consumed for an SCTP association to failover.
The client and then server both have two NICs.
Under the test, I setup the association between the client and the server.
Then I just pulled out one of the network wire of the client.
Theoretically, it should take at least 1+2+4+8+16+32=63 seconds to failover with the standard configuration.
(RTO.mix=1 sec, RTO.max=60 secs, PATH_MAX_RETRANS=5)
However, in my tests, it surprisingly usually only took about 20 seconds to failover.
Why shall this happen?
Can somebody explain the reason for me?
Thanks a lot!



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