ZyXEL Communications GS1920-48HPv2, Руководство пользователя

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Chapter 34 OAM
GS1920v2 Series User’s Guide
311
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).
Ac tive
: The port initiates OAM discovery; sends information PDUs; and may send event
notification PDUs, variable request/response PDUs, or loopback control PDUs.
Pa ssive
: 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 errored 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
size
This field displays the maximum size of PDU for receipt and delivery.
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.
Fo rwa rd
: The port is forwarding packets normally.
Lo o pb a c k
: The port is in loopback mode.
Disc a rd
: The port is discarding non-OAMPDUs because it is trying to or has put the remote
device into loopback mode.
Table 145 Advanced Application > OAM Status > OAM Details (continued)
LABEL DESC RIPTIO N