3Com 7757 Configuration Manual page 216

216 C 27: DLDP C
HAPTER ONFIGURATION
Table 147 DLDP timers
Timer
Echo waiting timer
Entry aging timer
Enhanced timer
Description
It is enabled when DLDP enters the probe
state. The echo waiting timer length is 10
seconds.
If no echo packet is received from the
neighbor when the Echo waiting timer
expires, the state of the local end is set to
unidirectional link (one-way audio) and the
state machine turns into the disable state.
DLDP outputs log and tracking
information, sends flush packets.
Depending on the user-defined DLDP
down mode, DLDP disables the local port
automatically or prompts you to disable
the port manually. At the same time, DLDP
deletes the neighbor entry.
When a new neighbor joins, a neighbor
entry is created and the corresponding
entry aging timer is enabled
When an advertisement packet is received
from a neighbor, the neighbor entry is
updated and the corresponding entry
aging timer is updated
In the normal mode, if no packet is
received from the neighbor when the entry
aging timer expires, DLDP sends an
advertisement packet with an RSY tag, and
deletes the neighbor entry.
In the enhanced mode, if no packet is
received from the neighbor when the entry
aging timer expires, DLDP enables the
enhanced timer
The entry aging timer length is three times
the advertisement timer length.
In the enhanced mode, if no packet is
received from the neighbor when the entry
aging timer expires, DLDP enables the
enhanced timer for the neighbor. The
enhanced timer length is 10 seconds
The enhanced timer then sends one probe
packet every second and eight packets
successively to the neighbor.
If no echo packet is received from the
neighbor when the enhanced timer
expires, the state of the local end is set to
unidirectional communication state and
the state machine turns into the disable
state. DLDP outputs log and tracking
information and sends flush packets.
Depending on the user-defined DLDP
down mode, DLDP disables the local port
automatically or prompts you to disable
the port manually. Meanwhile, DLDP
deletes the neighbor entry.