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32 © 2007 VBrick Systems, Inc.
Destination Address
Mode
Allows the user to specify how the destination address will be
configured: IP Address, Host Name, or IPv6.
• IP Address – This is the Destination IP Address of the encoded
video. When this is a multicast address, the transmit mode is also
set to multicast. Similarly, if this is a unicast address, the transmit
mode is also set to unicast.
• Host Name – Sets the source for video to be received using
Host Name of the source. It can be used only for a unicast
source.
• IPv6 – Use Internet Protocol Version 6. This next generation
version of the Internet Protocol includes improved address
space, quality of service, and security features in support of
unicast transmissions only.
Destination Port This is the destination IP port of the network device that will be
receiving the encoded video.
Transmit Mode This read-only parameter (derived from the Destination IP
Address) tells you whether the encoder is transmitting the video
stream in Unicast or Multicast mode. In Unicast mode, if the
network portion of the IP address is outside the scope of the local
area network, the Unicast address is presumed to be outside the
network.
Video Time to Live The number of hops (between routers) for which an IP packet is
valid on the network.
Video Type of
Service
The TOS (Type of Service) can be configured in the IP header to
establish packet priority in the network.
Unicast Poll This parameter is used to instruct the VBrick to poll whether the
unicast destination VBrick is configured to accept this stream. If the
unicast destination VBrick is not configured to accept this stream,
this VBrick will not send the stream. This feature is designed to
eliminate unwanted unicast video traffic across the network.
Packet Payload Size Controls the amount of MPEG data within each UDP packet. The
default value is 4136. Since Ethernet networks are limited to a
packet size of 1500 bytes, multiple IP packets are required to span
one UDP packet. When choosing a packet payload size, special
attention must be paid to the network capability and topology. The
allowed range is 1316 to 8872 bytes per packet, even numbers only.
The VBrick will not produce fragmented transport packets at or
below a payload size of 1472.