[SR-Users] Kamailio Dispatcher error msg 407

[Rex Lin (林昱頡)]

Hi admins,

I'm kinda new in this group and I'm not quite sure if I'm posting in a correct way, advise if I'm wrong.
below is my post.
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I would like to activate Dispatcher module for apply Load Balance functionality purpose.
but it's been hard to complete so far, I wonder if you can give me some advise in below situation.
we have 2 Kamailios, the version is 4.3.3 ; we use domain for the SIP registration.

we want to make Kamailios work in double active mode for SIP load balancing,
we have a F5 to do the domain name round robin to make two UAC regitering under two UAS.
I have put the "route(DISPATCH) b4 PSTN in request_route.
when I try to make UAC-A call to UAC-B, it appears 407 proxy authentication required.

we wiresharked, UAS has sent INVITE to UAS-B, but UAS-B sent the error code 407 to UAS-A
Is the configuration has to be set to "UAS-B accepting INVITE of UAS-A" ?
or the UAS-A should carrying the auth info into UAS-B ?

detail configuration as below.

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dispatcher params

modparam("dispatcher", "list_file", "/usr/local/etc/kamailio/dispatcher.list")
modparam("dispatcher", "flags", 1)
modparam("dispatcher", "dst_avp", "$avp(AVP_DST)")
modparam("dispatcher", "grp_avp", "$avp(AVP_GRP)")
modparam("dispatcher", "cnt_avp", "$avp(AVP_CNT)")
modparam("dispatcher", "sock_avp", "$avp(AVP_SOCK)")
modparam("dispatcher", "ds_ping_interval", 30)
modparam("dispatcher", "ds_ping_from", "sip:kamailio1 at awesomedomain.com")
modparam("dispatcher", "ds_ping_method", "OPTIONS")
modparam("dispatcher", "ds_probing_mode", 1)
modparam("dispatcher", "ds_probing_threshold", 1)

DISPATCHER Routing

route[DISPATCH] {
# round robin dispatching on gateways group '1'
        if(!ds_select_dst("1", "4")) {
                send_reply("404", "No destination");
                exit;
                }
        xdbg("--- SCRIPT: going to <$ru> via <$du>\n");
        t_on_failure("RTF_DISPATCH");
        route(RELAY);
        exit;
        }
# Re-route in case of failure
failure_route[RTF_DISPATCH] {
        if (t_is_canceled()) {
        exit;
        }

# next node - only for 500 or local timeout
        if (t_check_status("500") || (t_branch_timeout() && !t_branch_replied())) {
                if(ds_next_dst()) {
                        t_on_failure("RTF_DISPATCH");
                        route(RELAY);
                        exit;
                }
        }
}

Best Regards,
Rex Lin

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