Task 6: Configuring protection Chapter 6: Configuration and alignment
6-60
phn-2513_004v000 (Oct 2012)
Attribute Meaning
Primary Recovery Only available when Primary Secondary mode is set to
‘Secondary’.
‘Enabled’ means that when the Secondary unit is
active, the Primary unit is only allowed to become
active if it has been fault free for a configurable
period of time.
Primary Recovery Period Only available when Primary Secondary mode is set to
‘Secondary’.
How long (in mutes) the Primary unit must be free of
faults before it is allowed to take over as the active
unit (see Primary Recovery).
Protection Switch Alert ‘Enabled’ means that the CMU will alert the Ethernet
switch when a protection switch has occurred. The
CMU issues this alert by briefly (between 0.5 and 1
second) disabling the Ethernet port on the newly
active unit.
For most network deployments this is set to
‘Disabled’. Setting this to ‘Enabled’ may however be
useful in complex networks where the network design
is to allow an alternative route to bridge the traffic
following a protection switch.
Rx Diversity TPID The Inactive unit sends special Receive Diversity
Ethernet Frames to the Active unit via the Ethernet
Switch. These frames must be configured to be
tagged as either C-TAG or S-TAG frames.
Rx Diversity VID The Inactive unit sends special Receive Diversity
Ethernet Frames to the Active unit via the Ethernet
Switch. These frames must be configured with a
specific VID.
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