User's Manual

Advanced Configuration /
Advanced
82
BEC 6800RUL User Manual
SIP_ALG
Select Enable to activate SIP ALG feature or Disabled to disable this feature.
The Session Initiation Protocol (SIP) is an IETF-defined signaling protocol, widely used for
controlling multimedia communication sessions such voice and video calls over Internet protocol
(IP). The protocol can be used for creating, modifying and terminating two-party (unicast) or
multiparty (multicast) sessions consisting of one or several media streams. It is a text-based
Application Layer protocol.
But as many use NAT to communicate with the public networks, and the IP address and port
combination in SIP packets are needed for addressing, we must come up with an effective way to
deal with SIP NAT traversal. SIP ALG is an easy solution with which you are only required to
enable SIP ALG on NAT application in this router to easily experience the smooth SIP connection
between private networks and public networks or even in two private networks with your VoIP
devices.
IGMP
IGMP, known as Internet Group Management Protocol, is used to management hosts from
multicast group.
IGMP Proxy: Accepting multicast packet. Default is set to Disable.
IGMP Snooping: Enable or disable the IGMP Snooping function. Without IGMP snooping,
multicast traffic is treated in the same manner as broadcast traffic - that is, it is forwarded to all
ports. With IGMP snooping, multicast traffic of a group is only forwarded to ports that have
members of that group.”