Exa mple We bLo gic S IP Ser ver Ne two rk Con fi gu ra ti on
Content-Length: 0
No.
Time
3 3.430903
Source
10.1.1.1
Destination
10.1.3.4
Protocol Info
SIP
Status: 200 OK
Internet Protocol, Src: 10.1.1.1 (10.1.1.1), Dst: 10.1.3.4 (10.1.3.4)
User Datagram Protocol, Src Port: 42316 (42316), Dst Port: 9999 (9999)
Session Initiation Protocol
maddr-Based Configuration
When the maddr parameter is present in the Via header, the response is sent to the IP address
specified in the maddr rather than to the received IP address (even when SNAT is enabled). In
the example below, the UAC specifies a maddr set to 2.3.4.5 in the Via header. Consequently the
response from the SIP server makes it to the UAC.
Figure 3-5 maddr Sequence
AC A 2.3.4.5
LB 1.2.3.4
WLSS 1 10.1.1.1
|
|
|
|
|
|
|(1) SUBSCRIBE
|
|
|----------------------->|
|
| (2.3.4.5->1.2.3.4)
|(2) SUBSCRIBE
|
|
|----------------------->|
|
| (10.1.3.4 ->10.1.1.1) |
|
|
|
|
|(3) 200 OK
|
|
|<-----------------------|
|
| (10.1.1.1->2.3.4.5 )
|
|(4) 200 OK
|
|
|<-----------------------|
|
| (1.2.3.4->2.3.4.5 )
|
|
|
|
|
The complete message trace from Figure 3-5 is shown in Listing 3-6 below.
3-12
Configuring Network Resources