[sctp-dev] Setting "Traffic Class" to a SctpChannel

[Michal Lefler]

Chris.
Thanks for your response.
We are indeed interested in configuring the different SCTP parameters
since it makes a significant difference in how the associations function
in different scenarios (channel failover etc.).
SCTP is very sensitive to the network condition and we interconnect
different associations with different network condition, so we should be
able to configure profile per each remote association.
We would like to configure each server accepted channel differently. Is
this possible?

We would like to be able to configure the traffic class.

In addition, we are very interested to be able to configure the
following parameters:
* net.sctp.sack_timeout
* net.sctp.prsctp_enable
* net.sctp.addip_enable
* net.sctp.rto_beta_exp_divisor
* net.sctp.rto_alpha_exp_divisor
* net.sctp.cookie_preserve_enable
* net.sctp.hb_interval 
* net.sctp.max_init_retransmits 
* net.sctp.path_max_retrans 
* net.sctp.rcvbuf_policy
* net.sctp.sndbuf_policy
* net.sctp.association_max_retrans
* net.sctp.max_burst
* net.sctp.valid_cookie_life 
* net.sctp.rto_max
* net.sctp.rto_min
* net.sctp.rto_initial

and in a lower priority:
* net.sctp.sctp_wmem
* net.sctp.sctp_rmem
* net.sctp.sctp_mem

Thanks,
Michal.


-----Original Message-----
From: Chris Hegarty [mailto:chris.hegarty at oracle.com] 
Sent: Tuesday, July 12, 2011 12:35 PM
To: Michal Lefler
Cc: sctp-dev at openjdk.java.net
Subject: Re: [sctp-dev] Setting "Traffic Class" to a SctpChannel

On 07/ 7/11 03:09 PM, Michal Lefler wrote:
> Hi.
> Is there a way in which I can set the traffic class to a
> com.sun.nio.sctp.SctpChannel instance?

Currently there is no way of setting the traffic class on an 
SctpChannel. In our experience traffic class was not widely used and 
there were no requests for supping it in SCTP.

Since socket options are supported through the SctpSocketOption 
interface and the channel can report its supported options, 
supportedOptions(), then it may be possible to support implementation 
specific options in the future.

Is this something that is really important to you?

-Chris.

> I mean something similar to the TCP option:
> java.net.Socket.setTrafficClass(int tc);
>
> Thanks,
> Michal.
>

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