Basic Concepts - HP 5130 EI Series Configuration Manual

Basic concepts

DLDP neighbor states
If port A and B are on the same link and port A can receive link-layer packets from port B, port B is a
DLDP neighbor of port A. Two ports that can exchange packets are neighbors.
Table 6 DLDP neighbor states
DLDP timer
Confirmed
Unconfirmed
DLDP port states
A DLDP-enabled port is called a DLDP port. A DLDP port can have multiple neighbors, and its state
depends on the DLDP neighbor state.
Table 7 DLDP port states
State
Initial
Inactive
Bidirectional
Unidirectional
DLDP timers
Table 8 DLDP timers
DLDP timer
Advertisement timer
Probe timer
Echo timer
Entry timer
Enhanced timer
Description
The link to a DLDP neighbor is bidirectional.
The state of the link to a newly discovered neighbor is not determined.
Description
DLDP is enabled on the port, but is disabled globally.
DLDP is enabled on the port and globally, and the link is physically down.
DLDP is enabled on the port and globally, and at least one neighbor in Confirmed
state exists.
DLDP is enabled on the port and globally, and no neighbor in Confirmed state
exists. In this state, a port does not send or receive packets other than DLDP
packets any more.
Description
Advertisement packet sending interval (the default is 5 seconds and is
configurable).
Probe packet sending interval. This timer is set to 1 second.
The Echo timer is triggered when a probe is launched for a new neighbor. This
timer is set to 10 seconds.
When a new neighbor joins, a neighbor entry is created and the corresponding
entry timer is triggered if the neighbor is in Confirmed state. When an
Advertisement is received, the device updates the corresponding neighbor entry
and the Entry timer.
The setting of an Entry timer is three times that of the Advertisement timer.
The Enhanced timer is triggered, together with the Echo timer, when the Entry timer
expires. Enhanced timer is set to 1 second.
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