LevelOne GTL-2691 User Manual

Page 469

HAPTER

| Basic Administration Protocols

Ethernet Ring Protection Switching

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Configure Details

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Domain Name – Name of a configured ERPS ring.

◆

Admin Status – Activates the current ERPS ring.
Before enabling a ring, the global ERPS function should be enabled see

(

"ERPS Configuration" on page 467

), the east and west ring ports

configured on each node, the RPL owner specified, and the control

VLAN configured.
Once enabled, the RPL owner node and non-owner node state machines

will start, and the ring will enter idle state if no signal failures are

detected.

◆

MEG Level – The maintenance entity group (MEG) level which provides

a communication channel for ring automatic protection switching

(R-APS) information. (Range: 0-7)
This parameter is used to ensure that received R-APS PDUs are directed

for this ring. A unique level should be configured for each local ring if

there are many R-APS PDUs passing through this switch.

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Node ID – A MAC address unique to the ring node. The MAC address

must be specified in the format xx-xx-xx-xx-xx-xx or xxxxxxxxxxxx.

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Node State – Refer to the parameters for the Show page.

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West Port – Connects to next ring node to the west.
Each node must be connected to two neighbors on the ring. For

convenience, the ports connected are referred to as east and west

ports. Alternatively, the closest neighbor to the east should be the next

node in the ring in a clockwise direction, and the closest neighbor to the

west should be the next node in the ring in a counter-clockwise

direction.
Once configured, this field shows the ring port for this node, and the

interface state:

■

Blocking – The transmission and reception of traffic is blocked and

the forwarding of R-APS messages is blocked, but the transmission

of locally generated R-APS messages is allowed and the reception of

all R-APS messages is allowed.

■

Forwarding – The transmission and reception of traffic is allowed;

transmission, reception and forwarding of R-APS messages is

allowed.

■

Down – The interface is not linked up.

■

Unknown – The interface is not in a known state.

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East Port – Connects to next ring node to the east.

◆

RPL Port – If node is connected to the RPL, this shows by which

interface.