Allied Telesis AT-iMG606BD Especificações descarregar pdf (Página 503)

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13. Configuring Network Services Protection Switching-EPSR

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AlliedView NMS Administration Guide

port and is allowed to flow through, because the control messages originate either at a master node or transit node but

always terminate at the master node.

When the master node detects a physical link break in the ring, it unblocks its SP port and allows the flow of non-control

traffic through the EPSR domain. Once the master node determines that the break in the ring has been restored, it goes back

to its normal operating procedure.

13.10.1.2 Example Ring Topologies

A typical topology has all devices (or certain ports on those devices) included in the protection domain. Moreover, each

device belongs to only the one domain. However, more complex topologies are possible, as shown in the following figure.

FIGURE 13-47 Example Ring Topologies

13.10.1.3 Summary of EPSR Configuration Data

When the network administrator uses the AlliedView NMS GUI to configure an EPSR topology, the following components

are involved. These will be explained in more detail as the AlliedView NMS GUI forms are described and an example

configuration is created.

• Ring Network VLAN - A VLAN in which the VLAN Interface in each device has two tagged linked ports, and forms a

loop.

• Non-ring Network VLAN - A VLAN in which the VLAN Interface in each device has two tagged linked ports, and does

not form a loop. This is a typical network VLAN, but in this case it could be part of a ring that has nodes not managed by

the AlliedView NMS.

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