Hello all,
We are moving our registration and location services to dedicated instances
geographically separate from our proxies and then using redirects to locate the
registered user. The idea is to protect the proxies from a potential
thundering herd of registrations if there was some network outage I’m using
dispatcher to find a registrar that has a registration for the user, if a user
is not locally registered a 503 is returned and the next server is contacted.
Registrations are replicated to other servers when the client is not behind
NAT. If the client is behind NAT, the registrar where the client initially
registered performs keep-alives and NAT traversal and also acts as an outbound
proxy instead of sending a redirect.
I’m attempting to simplify the configuration by using a dispatcher group to
classify incoming registrations and to select replication targets but the
registrar that initially received the request is in the group as well. Is
there an elegant way to chose all destinations except the local instance? I’m
currently doing this with the hack below but any suggestions would be greatly
appreciated.
Also, if anyone has any comments or recommendations on the topology, please
share!
Thanks,
Spencer
if (isflagset(FLT_FROMREG))
return;
subst('/^From:(.*)sip:.*@[a-zA-Z0-9.:]+(.*)$/From:\1sip:$au@DOMAIN\2/ig');
subst('/^To:(.*)sip:.*@[a-zA-Z0-9.:]+(.*)$/To:\1sip:$au@DOMAIN\2/ig’);
$rd = "DOMAIN";
$var(local_uri) = "sip:" + $Ri + ":" + $Rp;
ds_select_dst("10", "4");
if ($du != $var(local_uri)) {
t_replicate($du);
}
while (ds_next_dst()) {
if ($du != $var(local_uri)) {
t_replicate($du);
}
}
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