Planet XGS3-24042 User Manual download pdf (Page 599)

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66.4 MRPP Troubleshooting

The normal operation of MRPP protocol depends on normal configuration of each switch on MRPP ring,

otherwise it is very possible to form ring and broadcast storm:

 Configuring MRPP ring, you’d better disconnected the ring, and wait for each switch configuration,

then open the ring.

 When the MRPP ring of enabled switch is disabled on MRPP ring, it ensures the ring of the MRPP

ring has been disconnected.

 When there is broadcast storm on MRPP ring, it disconnects the ring firstly, and ensures if each

switch MRPP ring configuration on the ring is correct or not; if correct, restores the ring, and then

observes the ring is normal or not.

 The convergence time of MRPP ring net is relative to the response mode of up/down. If use poll

mode, the convergence time as hundreds of milliseconds in simple ring net, if use interrupt mode,

the convergence time within 50 milliseconds.

 Generally, the port is configured as poll mode, interrupt mode is only applied to better performance

environment, but the security of poll mode is better than interrupt mode, port-scan-mode {interrupt |

poll} command can be consulted.

 In normal configuration, it still forms ring broadcast storm or ring block, please open debug function

of primary node MRPP, and used show MRPP statistics command to observe states of primary

node and transfer node and statistics information is normal or not, and then sends results to our

Technology Service Center.

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