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The following example illustrates a real link fault occurs on one Cat.5 and the link fault is passed to the other
Cat.5 over two converters and the fiber cable by LFPT operation. Finally, the other link partner also detects a
link fault.
Advantage
The function allows two remote link partners of the media converters detect the link fault finally no matter
where the exact fault occurs. It allows the upper application takes necessary action in case a real link fault
occurs in any cable segment.
Methods to enable the function
The LFPT function can be enabled by:
Software setting:
4.3 802.1Q Control Function
802.1Q Control function allows perform 802.1Q VLAN related operation to the packets passing through the
media converter according packet contents as follows:
[Ingress Drop] setting
The setting is the first filtering mechanism to filter incoming packets based on frame types. The options are:
Disable -
Drop Untag -
Drop C-tag -
Drop S-tag -
Web management ->
Configuration -> System -> [Link fault pass through]
disable port ingress drop and admit all packet types
drop all untagged frames
drop frame with outer tag TPID 0x8100
drop frame with outer tag TPID 0x88A8
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