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fields back to their original values. Note that the 9990-TRX-MPEG will check the
consistency of the data entered and will reject invalid combinations. Once the Apply
button is pressed, a status message appears just below the Cancel button, as follows:
• IGMP Version: The 9990-TRX-MPEG implements the IGMP protocol for multicast
reception. This parameter controls the version of the protocol to be used.
o Auto-Detect: The 9990-TRX-MPEG will attempt to auto-detect the IGMP
version in use by inspecting the Group Membership Requests received from the
router. It defaults to IGMP Version 3 if no messages are received.
o IGMP Version 1: Force the use of Version 1 only (not recommended)
o IGMP Version 2: Force the use of Version 2 only
o IGMP Version 3: Force the use of Version 3 only
• Interface speed: Configures the speed of the interface. The 9990-TRX-MPEG Ethernet
interfaces only support two modes: 100 Mb/s Full-Duplex and 1 Gb/s Full-Duplex
o Auto-Negotiate: The Ethernet port will auto-negotiate the speed.
o 100 Mb/s Full-Duplex: Force the port to 100Mb/s Full-Duplex mode. Note that
the port will still perform auto-negotiation, but it will only advertise this mode.
o 1Gb/s Full-Duplex: restrict the operation to 1Gb/s Full-Duplex mode. Note that
the port will still perform auto-negotiation, but it will only advertise this mode.
Notes:
o If the 9990-TRX-MPEG streaming Ethernet interfaces are connected to a 10 Mb/s switch,
hub, or network feed, link will not be established and the port will not recognize the
connection.
o If you select 100 Mb/s Full-Duplex or 1 Gb/s Full-Duplex and the corresponding
streaming Ethernet interface is connected to a switch, hub or network feed that does not
support the selected speed, link will not be established and the port will not recognize the
connection.
o If the interface speed is set to Auto-Negotiate, the streaming Ethernet port will allow link
to be established in 100 Mb/s Half-Duplex mode. However, this will be flagged as a
warning in the Network Statistics Tab and in the Admin Event Log Tab.
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Support has been disabled for 10 Mb/s and Half-Duplex modes, as these are unsuitable for MPEG transport over IP
applications. Moreover, any modern switch supports at least 100 Mb/s Full-Duplex.
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