ZyXEL Communications GS1920v2 Series User Manual page 195

Table 92 PORT > OAM > OAM Status > OAM Details (continued)
LABEL DESCRIPTION
Local Client/Remote Client Setup
Mode This field displays the OAM mode. The device in active mode (typically the service
provider's device) controls the device in passive mode (typically the subscriber's device).
Active: The port initiates OAM discovery; sends information PDUs; and may send event
notification PDUs, variable request/response PDUs, or loopback control PDUs.
Passive: The port waits for the remote device to initiate OAM discovery; sends information
PDUs; may send event notification PDUs; and may respond to variable request PDUs or
loopback control PDUs.
The Switch might not support some types of PDUs, as indicated in the fields below.
Unidirectional This field indicates whether or not the port can send information PDUs to transmit fault
information when the receive path is non-operational.
Remote loopback This field indicates whether or not the port can use loopback control PDUs to put the
remote device into loopback mode.
Link events This field indicates whether or not the port can interpret link events, such as link fault and
dying gasp. Link events are sent in event notification PDUs and indicate when the number
of errors in a given interval (time, number of frames, number of symbols, or number of error
frame seconds) exceeds a specified threshold. Organizations may create organization-
specific link event TLVs as well.
Variable retrieval This field indicates whether or not the port can respond to requests for more information,
such as requests for Ethernet counters and statistics, about link events.
Max. OAMPDU This field displays the maximum size of PDU for receipt and delivery.
size
Local Client/Remote Client Operational status
Link status This field indicates that the link between the Switch port and a connected IEEE 802.3ah-
enabled remote Ethernet device is up or down.
Info. revision This field displays the current version of local state and configuration. This two-octet value
starts at zero and increments every time the local state or configuration changes.
Parser state This field indicates the current state of the parser.
Forward: The port is forwarding packets normally.
Loopback: The port is in loopback mode.
Discard: The port is discarding non-OAM PDUs because it is trying to or has put the remote
device into loopback mode.
Chapter 32 OAM
GS1920v2 Series User's Guide
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