H3C S3100 8C SI User Manual

Operation Manual – DLDP
H3C S3100 Series Ethernet Switches Chapter 1 DLDP Configuration
1-7
1.2.3 DLDP Timers
Table 1-6 DLDP timers
Timer Description
Advertisement
sending timer
Interval between sending advertisement packets, which can
be configured on a command line interface.
By default, the timer length is 5 seconds.
Probe sending timer
The interval is 0.5 seconds. In the probe state, DLDP sends
two probe packets in a second.
Echo waiting timer
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.
Entry aging timer
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.
Enhanced timer
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.

H3C S3100 8C SI Specifications

General

Brand	H3C
Model	S3100 8C SI
Category	Switch
Language	English