LAN9311 Datasheet, PDF (387/461 Pages) SMSC Corporation – Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface

Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
14.5.3.17 Switch Engine Port Ingress Configuration Register (SWE_PORT_INGRSS_CFG)
Register #:
1841h
Size:
32 bits
This register is used to configure the per port ingress rules.
BITS
31:6
5:3
2:0
DESCRIPTION
RESERVED
Enable Learning on Ingress
When set, source addresses are learned when a packet is received on the
corresponding port and the corresponding Port State in the Switch Engine
Port State Register (SWE_PORT_STATE) is set to forwarding or learning.
There is one enable bit per ingress port. Bits 5,4,3 correspond to switch
ports 2,1,0 respectively.
Enable Membership Checking
When set, VLAN membership is checked when a packet is received on the
corresponding port.
The packet will be filtered if the ingress port is not a member of the VLAN
(unless the Admit Non Member bit is set for the port in the Switch Engine
Admit Non Member Register (SWE_ADMT_N_MEMBER))
For destination addresses that are found in the ALR table, the packet will be
filtered if the egress port is not a member of the VLAN (for destination
addresses that are not found in the ALR table only the ingress port is
checked for membership).
The VLAN Enable bit in the Switch Engine Global Ingress Configuration
Register (SWE_GLOBAL_INGRSS_CFG) needs to be set for these bits to
have an affect.
There is one enable bit per ingress port. Bits 2,1,0 correspond to switch
ports 2,1,0 respectively.
TYPE
RO
R/W
R/W
DEFAULT
-
111b
000b
SMSC LAN9311/LAN9311i
387
DATASHEET
Revision 2.0 (02-14-13)