Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide User Manual

Page 90

CLI display of MRP ring information (Continued)

TABLE 20

Field

Description

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

Active interface

The physical interfaces that are sending and receiving RHPs.

NOTE
If a port is disabled, its state is shown as "disabled".

NOTE
If an interface is a trunk group, the member port which comes up first is listed.

Metro Features

FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide

53-1003086-04