[asterisk-ss7] Combined linksets and mtp3d

[German Becker]

HI Michael, thanks for the reply. By hosts I mean asterisk boxes, that
would make them SSPs Both of them are connected with one signalling link to
one STP (different STP for each host) wich in turn will connect to the
destination STP(s). I'll try to sketch the scenario

-------------
| Asterisk1 |--voice trunks-
| mtp3d     |----------------|STP 1|----------|SSP| (destination point code)
-------------                            /
    | (tcp)                             /
------------                           /
|Asterisk2  |--voice trunks           /
|mtp3d      |----------------|STP 2|--
------------

As for the variant. it is ITU. And weather it would be primary/alternate or
"load balanced" is under discussion with the connected party. However load
bancing is a possibility.

What I would like to achieve is for incomming messages, both mtp3d route
them to the corresponding host (according to cic and ord opc); and for
outgoing messages, each asterisk deceide on which link (or linkset) send
it.

I thought something like these could be achieved, based on this part of the
below(l4isuop.c), However, I don't get how should i configure it.

    switch (link->linkset->loadshare) {
        case LOADSHARE_NONE:
            if (!link->schannel.mask)
                slink = link;
            break;
        case LOADSHARE_LINKSET:
            if (linkset->n_slinks)
                slink = linkset->slinks[cic % linkset->n_slinks];
            break;
        case LOADSHARE_COMBINED_LINKSET:
            {
                int n_slinks = 0;
                int six;
                for (lsi = 0; lsi < n_linksets; lsi++)
                    if (linksets[lsi].enabled)
                        if (&linksets[lsi] == linkset ||
                                (is_combined_linkset(linkset,
&linksets[lsi])))
                            n_slinks += linksets[lsi].n_slinks;
                if (n_slinks) {
                    six = cic % n_slinks;
                    n_slinks = 0;
                    for (lsi = 0; lsi < n_linksets; lsi++)
                        if (linksets[lsi].enabled)
                            if (&linksets[lsi] == linkset ||
                                    (is_combined_linkset(linkset,
&linksets[lsi]))) {
                                if (six - n_slinks <
linksets[lsi].n_slinks) {
                                    slink = linksets[lsi].slinks[six -
n_slinks];
                                    break;
                                }
                                n_slinks += linksets[lsi].n_slinks;
                            }
                }
            }
            break;
    }



On Thu, Jan 12, 2012 at 11:29, Michael Mueller <ss7box at gmail.com> wrote:

> are those 2 "hosts" STPs or SSPs? what you describe could be a combined
> linkset if connected to STPs and using ANSI SS7; if using ITU then this
> might be a primary/alternate linkset scenario; my experience says the
> combined linkset concept exists in ANSI SS7 and not in ITU
>
> On Thu, Jan 12, 2012 at 8:15 AM, German Becker <german.becker at gmail.com>wrote:
>
>> Hi,
>>
>> I have a scenario with 2 hosts, 2 links on each host, one of the links
>>  with signaling on each host and the DPC for all the voice TS reachable
>> through both signaling links.
>>
>> I'm not sure if I need to create a single linkset with two signaling
>> links on it (one per host), or two combined linksets.
>> I tried the 2 links aproach, but when one of the links is down (i.e.
>> asterisk lose connection with the remote mtp3d), all the TS are set to
>> block, instead of singnaling through the other link.
>>
>> Has anyone set up a similar scenario?
>>
>>
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