Problems in using SCTP CMT

[Randall Stewart]

Michael and I have developed a fix here at
the IETF.

at least with pf=0 dac=1 and off=1

We will next test with pf..

I will commit the code to Head...

I can also send you a 7.x version tarball.. not sure if it will
compile (it will work for 7.1 I know for sure)

Let me know if you want such a tar..

R
On Mar 23, 2009, at 6:20 AM, Andrew Chen wrote:

> Hi,
> 	We have some problems when we tried to send data using CMT-SCTP.  
> Actually, we are not sure if we do enable CMT functionalities. We  
> set up two PCs with FreeBSD-7.0. Each PC has two NICs and two IPs.  
> One is public and the other is private. We wrote simple FTP server  
> and client programs. On both sides, local addresses are bound as  
> INADDR_ANY. According to http://tools.ietf.org/html/draft-ietf-tsvwg-sctpsocket-14#section-4.1.5
> , if we bind INADDR_ANY and then call connect(), the multi-homing  
> capability of SCTP is automatically enabled. Further, we also turn  
> on sysctl states by setting
> sysctl net.inet.sctp.cmt_pf=1
> sysctl net.inet.sctp.cmt_use_dac=1
> sysctl net.inet.sctp.cmt_on_off=1
> 	Then we start transmission and capture the traffics. Unfortunately,  
> the captured packet shows data were transmitted on primary path and  
> there were only heartbeat/HB ACKs on the other path.
> 	To our knowledge, to use CMT, the only things we have to do is to  
> establish a multihomed association, and turn on the sysctl options.
> 	Can anyone point out something we did wrong or steps we missed?
> 	Thanks in advance.
>
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------------------------------
Randall Stewart
803-317-4952 (cell)
803-345-0391(direct)