LAN9312 datasheet(390/458 Pages) SMSC

390 / 458 page

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

Datasheet

Revision 1.2 (04-08-08)

390

SMSC LAN9312

DATASHEET

14.5.3.21

Switch Engine Port Mirroring Register (SWE_PORT_MIRROR)

This register is used to configure port mirroring.

1846h

Size:

32 bits

BITS

DESCRIPTION

TYPE

DEFAULT

31:9

RESERVED

Enable RX Mirroring Filtered

When set, packets that would normally have been filtered are included in the

receive mirroring function and are sent only to the sniffer port. When

cleared, filtered packets are not mirrored.

Note:

The Ingress Filtered Count Registers will still count these packets

as filtered and the Switch Engine Interrupt Pending Register

(SWE_IPR) will still register a drop interrupt.

R/W

7:5

Sniffer Port

These bits specify the sniffer port that transmits packets that are monitored.

Bits 7,6,5 correspond to switch ports 2,1,0 respectively.

Note:

Only one port should be set as the sniffer.

R/W

00b

4:2

Mirrored Port

These bits specify if a port is to be mirrored. Bits 4,3,2 correspond to switch

ports 2,1,0 respectively.

Note:

Multiple ports can be set as mirrored.

R/W

00b

Enable RX Mirroring

This bit enables packets received on the mirrored ports to be also sent to

the sniffer port.

R/W

Enable TX Mirroring

This bit enables packets transmitted on the mirrored ports to be also sent to

the sniffer port.

R/W

LAN9312 Datasheet(PDF) 390 Page - SMSC Corporation

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