RLDP (Ring Light Detection and Protection) of Simplified Optical 3.0 -- Configure one-way link detection

4.2.1 networking requirements
As shown in Figures 4-2, devices A and B are connected by optical fibers, and the two lines in the figure represent the Tx and Rx lines of the optical fibers respectively. A and B enable the RLDP unidirectional link detection function. If either the Tx of port A and the Rx of port B or the Rx of port A and the Tx of port B fail, the protocol can detect the unidirectional fault and take corresponding actions. If the fault is recovered, the administrator can manually restore the protocol status on A and B and restart the detection.

4.2.2 Network topology diagram

Figure 4-2

4.2.3 Key Points of Configuration
Enable RLDP globally.
Configure the one-way link detection function with RLDP under interface l and specify the processing method when a one-way fault occurs.
4.2.4 Configuration steps

# Configure on Device A.

DeviceA is enabled.

DeviceA# configure terminal

DeviceA(config)# rldp enable

DeviceA(config)# interfaceGigabitEthernet 0/1

DeviceA(config-if-GigabitEthernet0/1)# rldp port unidirection-detect shutdown-port

# Configure on SwitchB.

DeviceB is enabled.

DeviceB# configure terminal

DeviceB(config)# rldp enable

DeviceB(config)# interfaceGigabitEthernet 0/1

DeviceB(config-if-GigabitEthernet0/1)# rldp port unidirection-detect shutdown-port

4.2.5 verification configurationresult

Check the RLDP status information of DeviceA.

DeviceA> enable

DeviceA# show rldp

rldp state: enable

rldp hello interval: 3

rldp max hello     : 2

rldp local bridge: 00d0.f822.33aa

-----------------------------------

Interface GigabitEthernet 0/1

port state: normal

neighbor bridge : 00d0.f800.51b1

neighbor port: GigabitEthernet 0/1

unidirection detect information:

The action "shutdown-port"

The state is normal.

# Check the RLDP status informationof DeviceB.

DeviceB enabled

DeviceB# show rldp

rldp state: enable

rldp hello interval: 3

rldp max hello     : 2

rldp local bridge: 00d0.f800.51b1

-----------------------------------

Interface GigabitEthernet 0/1

port state: normal

neighbor bridge : 00d0.f822.33aa

Neighbor port: GigabitEthernet 0/1

unidirection detect information:

action: shutdown-port

The translation of "state :normal" is "state : normal".

4.2.5 Common error
(1) The local or peer global RLDP function is not enabled.
(2) The RLDP detection methods configured on the local end and the peer end are inconsistent.
(3) The RLDP negotiation function is not enabled, resulting in misjudgment of link failure when configuring RLDP unidirectional link detection on one end.