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354 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Metro Ring Protocol (MRP)
10
TABLE 62 CLI display of MRP ring information
This field... Displays...
Ring id The ring ID
State The state of MRP. The state can be one of the following:
• enabled – MRP is enabled
• disabled – MRP is disabled
Ring role Whether this node is the master for the ring. The role can be one of the
following:
• master
• member
Master vlan The ID of the master VLAN in the topology group used by this ring. If a
topology group is used by MRP, the master VLAN controls the MRP
settings for all VLANs in the topology group.
NOTE: The topology group ID is 0 if the MRP VLAN is not the master
VLAN in a topology group. Using a topology group for MRP
configuration is optional.
Topo group The topology group ID.
Hello time The interval, in milliseconds, at which the Forwarding port on the ring
master node sends Ring Hello Packets (RHPs).
Prefwing time The number of milliseconds an MRP interface that has entered the
Preforwarding state will wait before changing to the Forwarding state.
If a member port in the Preforwarding state does not receive an RHP
within the Preforwarding time (Prefwing time), the port assumes that a
topology change has occurred and changes to the Forwarding state.
The secondary port on the Master node changes to Blocking if it receives
an RHP, but changes to Forwarding if the port does not receive an RHP
before the preforwarding time expires.
NOTE: A member node Preforwarding interface also changes from
Preforwarding to Forwarding if it receives an RHP whose
forwarding bit is on.
Ring interfaces The device two interfaces with the ring.
NOTE: If the interfaces are trunk groups, only the primary ports of the
groups are listed.
Interface role The interface role can be one of the following:
• primary
• Master node – The interface generates RHPs.
• Member node – The interface forwards RHPs received on the
other interface (the secondary interface).
• secondary – The interface does not generate RHPs.
• Master node – The interface listens for RHPs.
• Member node – The interface receives RHPs.
Forwarding state Whether MRP Forwarding is enabled on the interface. The forwarding
state can be one of the following:
• blocking – The interface is blocking Layer 2 data traffic and RHPs
• disabled – The interface is down
• forwarding – The interface is forwarding Layer 2 data traffic and
RHPs
• preforwarding – The interface is listening for RHPs but is blocking
Layer 2 data traffic