SNR S2989G-48TX-POE — mRPP и ULPP: Настройка и Устранение Неполадок в Сетях [419/553]

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S2989G-24TX Operation Manual

Chapter 7 Reliability Configuration

7-20

7.2.4

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.

7.3

ULPP

7.3.1

Introduction to ULPP

Each ULPP group has two uplink ports, they are master port and slave port. The port

may be a physical port or a port channel. The member ports of ULPP group have three

states: Forwarding, Standby, Down. Normally, only one port at the forwarding state, the

other port is blocked at the Standby state. When the master port has the link problem, the

master port becomes down state, and the slave port is siwthed to forwarding state.