SMSC LAN9311 User Manual
Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9311/LAN9311i
389
Revision 1.4 (08-19-08)
DATASHEET
14.5.3.19
Switch Engine Port State Register (SWE_PORT_STATE)
This register is used to configure the per port spanning tree state.
Register #:
1843h
Size:
32 bits
BITS
DESCRIPTION
TYPE
DEFAULT
31:6
RESERVED
RO
-
5:4
Port State Port 2
These bits specify the spanning tree port states for Port 2.
These bits specify the spanning tree port states for Port 2.
00 = Forwarding
01 = Blocking
10 = Learning
11 = Listening
01 = Blocking
10 = Learning
11 = Listening
R/W
00b
3:2
Port State Port 1
These bits specify the spanning tree port states for Port 1.
These bits specify the spanning tree port states for Port 1.
00 = Forwarding
01 = Blocking
10 = Learning
11 = Listening
01 = Blocking
10 = Learning
11 = Listening
R/W
00b
1:0
Port State Port 0
These bits specify the spanning tree port states for Port 0(Host MAC).
These bits specify the spanning tree port states for Port 0(Host MAC).
00 = Forwarding
01 = Blocking
10 = Learning
11 = Listening
01 = Blocking
10 = Learning
11 = Listening
Note:
Typically, the Host MAC is kept in the forwarding state, since it is
not a true network port.
not a true network port.
R/W
00b