H3C S9500E Series Configuration Manual page 33

State
Probe
Disable
DelayDown
DLDP timers
Table 10 DLDP timers
DLDP timer
Active timer
Advertisement timer
Probe timer
Echo timer
Entry timer
Indicates...
DLDP enters this state if it receives a packet from an unknown neighbor. In this state,
DLDP sends packets to check whether the link is unidirectional. As soon as DLDP
transits to this state, a probe timer starts and an echo timeout timer starts for each
neighbor being probed.
A port enters this state when:
A unidirectional link is detected.
•
The contact with the neighbor in enhanced mode gets lost.
•
In this state, the port does not receive or send packets other than
•
DLDPDUs.
A port in the Active, Advertisement, or Probe DLDP link state transits to this state
rather than remove the corresponding neighbor entry, and transits to the Inactive
state when it detects a port-down event. When a port transits to this state, the
DelayDown timer is triggered.
Description
Determines the Interval for sending Advertisement packets with RSY tags, (default is 1
second). That is, a switch in the active DLDP link state sends one Advertisement
packet with RSY tags every second by default. The maximum number of
advertisement packets with RSY tags that can be sent successively is 5.
Determines the interval for sending advertisement packets (default is 5 seconds).
Determines the interval to send Probe packets (default is 0.5 seconds). That is, a
switch in the probe state sends two Probe packets every second by default. The
maximum number of Probe packets that can be sent successively is 10.
This timer is set to 10 seconds and is triggered when a switch transits to the Probe
state or an enhanced detect is launched. When the Echo timer expires and no Echo
packet has been received from a neighbor switch, the state of the link is set to
unidirectional and the switch transits to the Disable state. When this occurs, the
switch sends Disable packets, prompts the user to shut down the port or shuts down
the port automatically (depending on the DLDP down mode configured), and removes
the corresponding neighbor entries.
When a new neighbor joins, a neighbor entry is created and the corresponding entry
timer is triggered. When a DLDP packet is received, the switch updates the
corresponding neighbor entry and the entry aging timer.
In normal mode, if no packet is received from a neighbor when the corresponding
entry aging timer expires, DLDP sends advertisement packets with RSY tags and
removes the neighbor entry.
In enhanced mode, if no packet is received from a neighbor when the Entry timer
expires, DLDP triggers the enhanced timer.
The setting of an Entry timer is three times that of the Advertisement timer.
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