H3C S3100 8C SI User Manual

Operation Manual – DLDP
H3C S3100 Series Ethernet Switches Chapter 1 DLDP Configuration
1-8
Timer Description
DelayDown timer
When a device in the active, advertisement, or probe DLDP
state receives a port down message, it does not removes the
corresponding neighbor immediately, neither does it
changes to the inactive state. Instead, it changes to the
delaydown state first.
When a device changes to the delaydown state, the related
DLDP neighbor information remains, and the DelayDown
timer is triggered. The DelayDown timer is configurable and
ranges from 1 to 5 seconds.
A device in the delaydown state only responds to port up
messages.
A device in the delaydown state resumes its original DLDP
state if it receives a port up message before the delaydown
timer expires. Otherwise, it removes the DLDP neighbor
information and changes to the inactive state.
1.2.4 DLDP Operating Mode
DLDP can operate in two modes: normal and enhanced.
Table 1-7 DLDP operating mode and neighbor entry aging
DLDP
operating
mode
DLDP detects
whether neighbors
exist or not when
neighbor tables are
aging
The entry aging
timer is enabled
or not during
neighbor entry
aging
The enhanced
timer is enabled
or not when the
entry aging timer
expires
Normal mode No
Yes (The neighbor
entry ages out
after the entry
aging timer
expires)
No
Enhanced
mode
Yes
Yes (The
enhanced timer is
enabled after the
entry aging timer
expires)
Yes (When the
enhanced timer
expires, the state
of the local end is
set to
unidirectional link,
and the neighbor
entry is aged out.)
1.2.5 DLDP Neighbor State
A DLDP neighbor can be in one of these two states: two way and unknown. You can
check the state of a DLDP neighbor by using the display dldp command.

H3C S3100 8C SI Specifications

General

Brand	H3C
Model	S3100 8C SI
Category	Switch
Language	English