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Transition Networks
Section I: FBRM/BFFG Product Description
Redundant SFBRM1040-140 models
Redundant
models
These SFBRM SFP Devices support fiber redundancy. They have two (2) fiber SFP
ports and one (1) copper port. When you tag the fiber ports as primary and secondary
with redundancy enabled, any fault on the primary port results in the secondary port
becoming operational. There is an option for reverting back to the primary once it
has been restored, or you can continue using the secondary port—these are user
selectable features. See Figure 10.
Figure 10: SFBRMs in Redundant Mode
Explanation
With Port 3 as the secondary port in Redundancy Mode and Port 2, the primary goes
down, the following will happen:
Stage
Description
A.
All Physical layer and OAM configurations of Port 2 will be applied to
Port 3.
B.
Port 2 is disabled, and Port 3 initialized to take over.
C.
An SNMP trap is sent indicating that the ports have switched.
D.
OAM
reinitialize
s (resets all OAM counters and event logs).
E.
All the dynamic MAC entries in the ATU are flushed and the active port
has to relearn the entries.
Note:
If the configuration option “revert” is set, when the primary port link is
restored the session will revert back to the primary port. If the “revert’ option
is NOT SET and the primary link is restored, the secondary port remains in
operation until the user intervenes.
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