Re: Linux SCTP multihoming question

[o.evistel@free.fr]

Hi Andreas,

My explanation was not clear enough.

I would like to know if it is possible to force sctp to use alernate address instead of primary address while both of them are available.

Regards
Omar 
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----- Mail original -----
De: "Andreas Fink" <afink@list.fink.org>
À: "OMAR AIT AMRANE" <o.evistel@free.fr>
Cc: "Marcelo Ricardo Leitner" <marcelo.leitner@gmail.com>, "linux-sctp" <linux-sctp@vger.kernel.org>
Envoyé: Vendredi 9 Février 2024 11:10:22
Objet: Re: Linux SCTP multihoming question

yes this is possible. My eSTP does this exactly this way. for M3UA and M2PA You simply use sctp_bindx to bind to exact local address you need.
You can add or remove local IP's and alter the association. But I'm not sure if you can force a specific path to be used as primary. SCTP basically can use any and switch over to the other.

If you think of something like hot/standby setup, you might want to do this on M3UA level which means having two SCTP associations (two ASPs in one AS)



> On 9 Feb 2024, at 11:05, o.evistel@free.fr wrote:
> 
> 
> Dear Marcelo
> 
> I am using linux-sctp as transport for SIGTRAN M3UA on RHEL 8.4 with multihoming (sctp_bindx(), sctp_connectx() API functions).
> I would like to know, after association setup, if it is possible to instruct SCTP to use a specific local address from the list of bound addresses to reach the peer.
> 
> Regards
> Omar AIT AMRANE
>