LAN9311 Datasheet, PDF (385/461 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
14.5.3.16 Switch Engine Global Ingress Configuration Register (SWE_GLOBAL_INGRSS_CFG)
Register #:
1840h
Size:
This register is used to configure the global ingress rules.
32 bits
BITS
DESCRIPTION
31:14
13
12:10
9
8
7
6
5
4
3
2
RESERVED
Allow Monitorin Echo
When set, monitored packets are allowed to be echoed back to the source
port. When cleared, monitored packets, like other packets, are never sent
back to the source port.
This bit is useful when the monitoring port wishes to receive it’s own IGMP
packets.
IGMP Monitoring Port
This field is the port bit map where IPv4 IGMP packets are sent.
Use IP
When set, the IPv4 TOS or IPv6 SC field is enabled as a transmit priority
queue choice.
RESERVED
Enable IGMP Monitoring
When set, IPv4 IGMP packets are monitored and sent to the IGMP
monitoring port.
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.
DA Highest Priority
When this bit is set and the Static 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)).
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.
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.
Use Precedence
When the priority is taken from an IPV4 packet (enabled via the Use IP bit),
this bit selects between precedence bits in the TOS octet or the DIFFSERV
table.
When set, IPv4 packets will use the precedence bits in the TOS octet to
select the transmit priority queue. When cleared, IPv4 packets will use the
DIFFSERV table to select the transmit priority queue.
TYPE
RO
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
1b
SMSC LAN9311/LAN9311i
385
DATASHEET
Revision 2.0 (02-14-13)