LAN9303 Datasheet, PDF (289/366 Pages) SMSC Corporation – Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII

Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII
Datasheet
13.4.3.16 Switch Engine Global Ingress Configuration Register (SWE_GLOBAL_INGRSS_CFG)
Register #:
1840h
Size:
32 bits
This register is used to configure the global ingress rules.
BITS
DESCRIPTION
31:16 RESERVED
15 802.1Q VLAN Disable
When set, the VID from the VLAN tag is ignored and the per port default
VID (PVID) is used for purposes of VLAN rules. This does not affect the
packet tag on egress.
14 Use Tag
When set, the priority from the VLAN tag is enabled as a transmit priority
queue choice.
13 Allow Monitor Echo
When set, monitoring packets are allowed to be echoed back to the source
port. When cleared, monitoring packets, like other packets, are never sent
back to the source port.
This bit is useful when the monitor port wishes to receive it’s own IGMP
packets.
12:10 IGMP Monitor Port
This field is the port bit map where IPv4 IGMP packets are sent.
9 Use IP
When set, the IPv4 TOS or IPv6 SC field is enabled as a transmit priority
queue choice.
8 RESERVED
7 Enable IGMP Monitoring
When set, IPv4 IGMP packets are monitored and sent to the IGMP monitor
port.
6 SWE Counter Test
When this bit is set the Switch Engine counters that normally clear to 0 when
read will be set to 7FFF_FFFCh when read.
5 DA Highest Priority
When this bit is set and the priority enable bit in the ALR table for the
destination MAC address is set, the transmit priority queue that is selected
is taken from the ALR Priority bits (see the Switch Engine ALR Read Data
1 Register (SWE_ALR_RD_DAT_1)).
4 Filter Multicast
When this bit is set, packets with a multicast destination address are filtered
if the address is not found in the ALR table. Broadcasts are not included in
this filter.
3 Drop Unknown
When this bit is set, packets with a unicast destination address are filtered
if the address is not found in the ALR table.
TYPE
RO
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
DEFAULT
-
0b
0b
0b
0b
0b
-
0b
0b
0b
0b
0b
SMSC LAN9303/LAN9303i
289
DATASHEET
Revision 1.3 (08-27-09)