Re: Re: Traffic handling modes of SGPs

Hello Brian,

thank you very much for your response.

For active-standby, your  second alternative fits me well.
According to my understanding of SIGTRAN the first option should not
be possible because SGPs cannot establish associations towards ASPs.

I interperet your statement
>
> Typically, however, SGPs run in loadshare mode, by nature of the design
> of the SS7 network to which they attach.

as there will be no SGPs that require ASPs to broadcast traffic to all
SGPs, otherwise I would expect a nomative statement in the RFC,
requiring it.

Regards

Ilie


On 12/2/05, Brian F. G. Bidulock <[email protected]> wrote:
> Ilie,
>
...
>
option 1) (it does not work in my view)
> For active-standby, your active SGP could have an association to the
> ASP and the standby SGP would not.  If the standby goes active, the
> standby would form an association and the previously active SGP would
> drop its association.
>
option 2)
> Alternatively, to act as active-standby within an AS, the stanby SGP can
> refuse ASP-ACTIVE for the AS with ERR(Management Blocking) or simply
> withhold ASP-ACTIVE Ack and let the ASP fall back to periodic procedure.
> When the standby goes active, it can then send ASP-ACTIVE-Ack and the
> previously active SGP can send unsolicited ASP-INACTIVE-Ack. (Look in
> the spec as to what happens when the ASP receives ASP-INACTIVE-Ack in
> the ASP-ACTIVE state for an AS.)

>
> --brian