LevelOne GTL-2691 - Manual (Page 469)

C HAPTER 14 | Basic Administration Protocols
Ethernet Ring Protection Switching
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Configure Details
◆ 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.
◆ 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.
◆ Node State – Refer to the parameters for the Show page.
◆ 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.
◆ East Port – Connects to next ring node to the east.
◆ RPL Port – If node is connected to the RPL, this shows by which
interface.