CANOGA PERKINS L357 Gigabit Ethernet Service Unit - Manual (Page 17)

EdgeAccess Universal Chassis System
L357 Gigabit Ethernet Service Unit 3-3
3.3 Alarms
The L357 can generate Major and Minor Alarms.
• In the UCS 1000 and 1002, these alarms are forwarded over the backplane to the CIM and appear
on the Major (MAJ) and Minor (MIN) CIM LEDs and then are forwarded to the DMM for
monitoring and transfer to the Network Manager as traps.
• In the UCS 1001, the alarm outputs are forwarded to the chassis motherboard.
For details about the Alarm Output Configuration, Alarm Log, and Trap Configuration screens, see
Chapter 4.
3.3.1 Link Loss Forwarding
When Link Loss Forwarding (LLF) is enabled, a fault on one side of the L357 propagates to the other
side to notify that device and stops signal transmission (brings down the link). See Figure 3. Set the
LLF propagation to User to Extension, Extension to User, or both directions. Set this in the User
Interface or at Switches 5 and 6; for details on setting the Switches, see Chapter 2.
Figure 3. Link Loss Forwarding Propagation