Bug ID 1213469: MRF SIP ALG: INVITE request with FQDN Route header will not translate SDP and 200 OK SDP dropped

Last Modified: Mar 26, 2023

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
16.0.0,, 16.0.1,,, 16.1.0, 16.1.1, 16.1.2,,, 16.1.3,,,, 17.0.0,,, 17.1.0

Opened: Dec 28, 2022
Severity: 4-Minor


BIG-IP not translating SDP or via headers IP with listener IP for an outbound call which causes to drop the 200 OK response.


Media pinholes are not created for INVITE.


In SIP ALG, INVITE request with FQDN Route header.


In the SIP_REQUEST event, a specific Route header could be removed and Insert it again in the SIP_REQUEST_SEND event before sending the request out. For example, when SIP_REQUEST { set pd_route_hdr_count [SIP::header count Route] set pd_route_unset 0 set pd_route [SIP::header Route] if {[SIP::method] == "INVITE" && ($pd_route_hdr_count equals 1) && $pd_route contains "sip:total.acc.nl;lr" } then { SIP::header remove "Route" set pd_route_unset 1 } } when SIP_REQUEST_SEND { if {[SIP::method] == "INVITE" && ($pd_route_unset == 1)} then { SIP::header insert "Route" $pd_route } }

Fix Information


Behavior Change