Interface Configuration Guide 7705 SAR Interfaces
Edition: 01 3HE 11011 AAAC TQZZA 87
3.2.8.5 Dying Gasp
Dying gasp is used to notify the far end that EFM-OAM is disabled or shut down on
the local port. The dying gasp flag is set on the OAMPDUs that are sent to the peer.
The far end can then take immediate action and inform upper layers that EFM-OAM
is down on the port.
When a dying gasp is received from a peer, the node logs the event and generates
an SNMP trap to notify the operator.
3.2.9 Ethernet Loopbacks
This section contains information on the following topics:
• Line and Internal Ethernet Loopbacks
• CFM Loopbacks for OAM on Ethernet Ports
Table 10 lists the loopbacks supported on Ethernet, DSL module (6-port DSL
Combination module and 8-port xDSL module), and GPON module ports.
Table 10 Loopbacks Supported on Ethernet, DSL, and GPON Ports
Loopback
Ethernet DSL GPON
Timed network line loopback ✓✓
Timed and untimed access line loopbacks ✓✓
Timed and untimed access internal
loopbacks
✓✓✓
Persistent access line loopback ✓
Persistent access internal loopback ✓
MAC address swapping ✓
CFM loopback on network and access
ports
✓✓✓
CFM loopback on ring ports and v-port ✓
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