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DES-7200 Configuration Guide Chapter 7 RLDP Configuration
7-2
configured and in linkup status on regular basis, and waits for the Echo
message from the neighbor port and waits for the Probe message sent by the
neighbor ports. If a link is correct both physically and logically, a port shall be
able to receive the Echo message of the neighbor port as well as the Probe
message of the neighbor port. Otherwise, the link is considered abnormal.
Note
To make use of the one-way detection and two-way detection
functions of the RLDP, it is necessary to ensure the RLDP is
enabled on the ports at both ends of the link. And, it is not allowed
for a port with RLDP enabled to connect multiple neighbor ports.
Otherwise, the RLDP cannot detect the health conditions of every
neighbor link.
7.1.2 Typical Application
Loop detection:
Figure-2: Loop detection
The so-called loop fault means that a loop appears on the links connected with
the port. A shown above, on a port the RLDP receives the RLDP message sent
from its machine, so the port is considered as loop fault. So, the RLDP deals
with the fault according to the user configurations, including alarming, setting
port violation, turning off the SVI with that port, turning off the port learning
forwarding, and more.
One-way link detection:
Figure-3: One-way link detection