fido2100 3-Port Industrial Ethernet DLR Switch with IEEE1588
Data Sheet
April 10, 2013
rspr
Ring Supervisor Enable. When this bit is set, fido2100 will support Ring
protocol redundancy as a ring supervisor. If it is reset, fido2100 will support
Ring protocol redundancy as a nonsupervisory device. Depending on the
setting of this bit, some logic will be enabled, some disabled and some function
differently. Details are described under appropriate sections.
p1rb
Port 1 Receive Blocked. When this bit is set all frames received on port 1 will
be dropped with the exception of following special frames. Ring beacon
frames will be forwarded to host CPU if p1br bit is set. Ring beacon frames
with source MAC address different from Ring Supervisor MAC ID register
will always be forwarded to host CPU. Ring Neighbor Check/Sign On
(multicast) frames will be forwarded to host CPU. Ring Link/Neighbor Status
frames or beacon Failure Notify frames with destination MAC address same as
host CPU MAC address will be forwarded to host CPU. Ring beacon frames
will be forwarded to port 2 if rspr bit is not set.
p1tb
p2rb
Port 1 Transmit Blocked. When this bit is set no frames will be transmitted
on port 1 with the exception of following special frames. Ring beacon frames
from host CPU will be transmitted if rspr bit is set (i.e. ring beacon will be
transmitted on both ports). Ring Neighbor Check/Sign On (multicast) frames
from host CPU will be transmitted if source port in frame matches port 1. Ring
beacon frames from port 2 will be transmitted if rspr bit is not set.
Port 2 Receive Blocked. When this bit is set all frames received on port 2 will
be dropped with the exception of following special frames. Ring beacon
frames will be forwarded to host CPU if p2br bit is set. Ring beacon frames
with source MAC address different from Ring Supervisor MAC ID register
will always be forwarded to host CPU. Ring Neighbor Check/Sign On
(multicast) frames will be forwarded to host CPU. Ring Link/Neighbor Status
frames or beacon Failure Notify frames with destination MAC address same as
host CPU MAC address will be forwarded to host CPU. Ring beacon frames
will be forwarded to port 1 if rspr bit is not set.
p2tb
p1br
Port 2 Transmit Blocked. When this bit is set no frames will be transmitted
on port 2 with the exception of following special frames. Ring beacon frames
from host CPU will be transmitted if rspr bit is set (i.e. ring beacon will be
transmitted on both ports). Ring Neighbor Check/Sign On (multicast) frames
from host CPU will be transmitted if source port in frame matches port 2. Ring
beacon frames from port 1 will be transmitted if rspr bit is not set.
Port 1 Beacon Receive. When this bit is set, Ring beacon frames received on
port 1 will be forwarded to host CPU. If this bit is reset, Ring beacons received
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