Filter
Top Products
Section Vl: FBRM/BFFG Software Features Transition Networks
Software feature descriptions, continued
Table 3: Device Software Configurable Features (continued)
Feature Description
Congestion Reduction The FBRM and BFFG Devices do not forward collision
signals or error packets between collision domains,
which improves baseline network performance.
In addition, the Devices filter packets destined for local
Devices, which reduces network congestion.
Far-End Fault (FEF)
FEF is a troubleshooting feature. With FEF enabled, if
the receiver on the fiber port goes “down” on one
Device, a FEF idle pattern is sent to the other Device to
terminate data transmission. Then an SNMP trap is sent
to the administrator, identifying the fiber link loss.
If FEF is disabled, a “down” Rx link on one Device
does not transmit to its peer, the down link notification
will not be passed on.
For FEF enabled and disabled scenarios, see illustration
below.
Far-End Fault Detection
(FEFD) Fiber Ports
If FEFD is enabled when the receiver on the fiber port
goes down on one Device, it sends a far-end-fault
pattern to the other side to bring down the fiber port on
both ends. An SNMP trap will be sent to the
administrator, indicating the fiber link loss.
If FEFD is disabled, a “down” Rx link on one Device is
not transmitted to the other Device; the link down signal
will not be passed over the link.
Continued on next page
62
24-Hour Technical Support: 1-800-260-1312 International: 00-1-952-941-7600