Dldp Timers - H3C S7500 Series Operation Manual

Operation Manual – DLDP
H3C S7500 Series Ethernet Switches

1.2.3 DLDP Timers

Table 1-6 DLDP timers
Timer
Advertisement
sending timer
Probe sending
timer
Echo waiting
timer
Entry aging
timer
Enhanced timer
Interval between sending advertisement packets, which can be
configured on a command line interface.
By default, the timer length is 5 seconds.
The interval is 0.5 seconds. In the probe state, DLDP sends two
probe packets in a second.
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.
1-7
Chapter 1 DLDP Configuration
Description