After traversal between public and private networks is
configured for an IP site on the SMC2.0, no image is available after the IP
site joins a conference. The IP site is in the public network, and the SMC2.0
are MCU are both in the intranet.
Confirm that the dual-NIC traversal configuration is correct on the embedded SC
of the SMC2.0.
2. No image is available even after the defaultzone
media routing is selected.
3. According to signaling analysis for the SC, during
the SC's communication with the terminal, the source device address in the
setup message is the MCU address instead of the SC address. It is confirmed
that the terminal directly communicates with the MCU instead of the SC. As a
result, media communication fails because the MCU cannot directly communicate
with a terminal IP address in the external network.
As shown in the preceding figure, 218.202.135.XXX is
the external IP address of the SC, 1.202.139.XXX is the external IP address of
the terminal, and 22.214.171.124 is the intranet IP address of the MCU.
defaultzone media routing, run system-view h323-config on the MCU, and
change the value of enable Call IP ARQ mode to 0. Then the image is
available after the IP site is called into a conference.
Media routing of an IP site passes through
defaultzone. Therefore, media routing needs to be enabled. The MCU cannot
communicate with a terminal IP address in the public network. Therefore, media
communication must be implemented between the SC and the terminal.
Enable defaultzone media routing for the SC, and
forcibly direct the IP site's media streams to the SC by setting enable Call
IP ARQ mode to 0 on the MCU.
In a non-standard networking environment, you need to
find out the root cause of the problem. Media communication fails because the
MCU cannot directly communicate with an IP site.