A10E/A28E/A28F Configuration Guide
7.6.8 Checking configurations
Use the following commands to check configuration results.
Alpha-A28E#show ethernet ring-
protection
Show ERPS ring configuration.
Alpha-A28E#show ethernet ring-
protection status
Show ERPS ring status
information.
Alpha-A28E#show ethernet ring-
protection statistics
Show ERPS ring statistics.
7.6.9 Maintenance
You can maintain the A10E/A28E as below.
Alpha-A28E(config)#clear ethernet
ring-protection
ring-id
command
Clear the effect of ring switching
control commands (force-switch
and manual-switch)
Alpha-A28E(config)#clear ethernet
ring-protection
ring-id
statistics
Clear protection ring statistic
information.
7.7 RRPS
7.7.1 Introduction
With the development of Ethernet to the MAN, voice, video and multicast service has come
up with higher requirements to the Ethernet redundancy protection and fault recovery time.
The fault recovery convergence time of original STP mechanism is in the second level, which
is far to meet the fault recovery time requirements of MAN.
RRPS solves the problems of weak protection to traditional data network and long time to
fault recovery, which, in theory, can provide 50ms rapid protection features.
As shown below, blocked interface node is the master node, other nodes are transmission
nodes. The master node generates by election. Each node can specify one loop interface as the
first interface, the other as the second interface. The master node usually sends Hello packets
periodically from the first interface and receives Hello packet sent by itself in the second
interface under the circumstance of complete Ethernet ring. Then the master node will block
the first interface immediately to ensure there is no loop when the ring network is in a
complete state. For the other nodes on the RRPS, the first interface No. and the second
interface No. play the same role basically.
RRPS generates master node by the election, so each node needs to collect device information
on RRPS, only the right collection leads to correct election. Topology collection is completed
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