OPTICAL SYSTEMS DESIGN
DOC ID: 10118101
OSD2512 OPERATOR MANUAL
PAGE 52
standardized way to do SFP auto detect, so here it is done by reading the SFP rom. Due to the
missing standardized way of doing SFP auto detect some SFPs might not be detectable. The
port is set in AMS mode. Cu port is set in
Auto
mode.
100-FX
- SFP port in 100-FX speed. Cu port disabled.
1000-X
- SFP port in 1000-X speed. Cu port disabled.
Ports in AMS mode with 1000-X speed has Cu port preferred.
Ports in AMS mode with 1000-X speed has fiber port preferred.
Ports in AMS mode with 100-FX speed has fiber port preferred.
Advertise Duplex
When duplex is set as auto i.e auto negotiation, the port will only advertise the specified
duplex as either
Fdx
or
Hdx
to the link partner. By default port will advertise all the
supported duplexes if the Duplex is Auto.
Advertise Speed
When Speed is set as auto i.e auto negotiation, the port will only advertise the specified speeds
(
10M
100M
1G
) to the link partner. By default port will advertise all the supported speeds if
speed is set as Auto.
Flow Control
When
Auto Speed
is selected on a port, this section indicates the flow control capability
that is advertised to the link partner.
When a fixed-speed setting is selected, that is what is used. The Current Rx column indicates
whether pause frames on the port are obeyed, and the Current Tx column indicates whether
pause frames on the port are transmitted. The Rx and Tx settings are determined by the result
of the last Auto Negotiation.
Check the configured column to use flow control. This setting is related to the setting for
Configured Link Speed.
NOTICE: The 100FX standard doesn't support Auto Negotiation, so when in 100FX mode the
flow control capabilities will always be shown as "disabled".
PFC
When PFC (802.1Qbb Priority Flow Control) is enabled on a port then flow control on a
priority level is enabled. Through the
Priority
field, range (one or more) of priorities can
be configured, e.g. '0-3,7' which equals '0,1,2,3,7'. PFC is not supported through auto
negotiation. PFC and Flowcontrol cannot both be enabled on the same port.
Maximum Frame Size
Enter the maximum frame size allowed for the switch port, including FCS. The range is 1518-
9600 bytes.
Excessive Collision Mode
Configure port transmit collision behavior.
Discard
: Discard frame after 16 collisions (default).
Restart
: Restart backoff algorithm after 16 collisions.
Frame Length Check
Configures if frames with incorrect frame length in the EtherType/Length field shall be
dropped. An Ethernet frame contains a field EtherType which can be used to indicate the
frame payload size (in bytes) for values of 1535 and below. If the EtherType/Length field is
above 1535, it indicates that the field is used as an EtherType (indicating which protocol is
encapsulated in the payload of the frame). If "frame length check" is enabled, frames with
payload size less than 1536 bytes are dropped, if the EtherType/Length field doesn't match the
actually payload length. If "frame length check" is disabled, frames are not dropped due to
