No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

Configuration Guide - Reliability

S9300, S9300E, and S9300X V200R013C00

This document describes the configurations of Reliability, including BFD Configuration, VRRP Configuration, NSR Configuration, DLDP Configuration, Smart Link and Monitor Link Configuration, MAC Swap Loopback Configuration, EFM Configuration, CFM Configuration, Y.1731 Configuration.
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
DLDP States

DLDP States

The Device Link Detection Protocol (DLDP) allows a device to identify the remote device and check connectivity of the unidirectional link by exchanging DLDP Data Units (DLDPDUs) with the remote device. DLDP defines the following states: Initial, Inactive, Active, Advertisement, Probe, Disable, and DelayDown.

Figure 5-3  State transition during DLDP packet exchange
Table 5-1  DLDP states

State

Description

Initial

DLDP is disabled.

Inactive

DLDP is enabled but the link is Down.

Active

DLDP is enabled and the link is Up, or neighbor entries are cleared.

Advertisement

All neighbors are bidirectionally reachable or have been in Active state for more than 5 seconds. This is a stable state when no unidirectional link has been detected.

Probe

Probe packets are sent to detect whether the link is unidirectional. When an interface enters this state, DLDP starts the probe timer and starts an echo timer for each neighbor to be detected.

Disable

DLDP in enhanced mode detects a unidirectional link and disables the interface that fails to send optical signals.

DelayDown

When an interface in Active, Advertisement, or Probe state receives a Port-Down event, the interface enters the DelayDown state but does not immediately delete neighbor entries and transitions to the Inactive state. In DelayDown state, the system reserves DLDP neighbor information and only responds to Port-Up events.

Translation
Download
Updated: 2019-04-09

Document ID: EDOC1100065868

Views: 15767

Downloads: 3

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next