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Configuration Guide - Reliability

S7700 and S9700 V200R011C10

This document describes the configuration of BFD, DLDP, VRRP, SmartLink, CFM, EFM, Y.1731 and MAC swap loopback to ensure reliability on the device.
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(Optional) Setting the Interval for Sending Advertisement Packets

(Optional) Setting the Interval for Sending Advertisement Packets


An interface in Advertisement state sends Advertisement packets. DLDP creates a neighbor entry, starts the entry timer, and transitions to the Probe state if the neighbor entry does not exist on the remote interface. DLDP updates the entry timer if the neighbor entry exists.

The interval for sending Advertisement packets must be smaller than one third of the STP convergence time. If the interval is too long, STP loops occur when a unidirectional link is still enabled on a DLDP interface. If the interval is too short, the traffic volume on the network increases.


  1. Run system-view

    The system view is displayed.

  2. Run dldp interval interval

    The interval for sending Advertisement packets is set.

    By default, the interval for sending the Advertisement packets is 5 seconds.


    The same interval for sending Advertisement packets must be set on the local and remote devices that are connected through optical fibers or copper twisted pairs; otherwise, DLDP cannot work properly.

Updated: 2019-10-18

N. documento: EDOC1000178318


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