DS33W41+ Maxim Integrated Products, DS33W41+ Datasheet - Page 76

• Manufacturer Part Number: DS33W41+
• Description: IC MAPPING ETHERNET 256CSBGA
• Manufacturer: Maxim Integrated Products

Specifications of DS33W41+

• Applications: Data Transport
• Interface: Parallel/Serial
• Voltage - Supply: 1.8V, 2.5V, 3.3V
• Package / Case: 256-CSBGA
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

________________________________________________ DS33X162/X161/X82/X81/X42/X41/X11/W41/W11
8.17.1 Frame Trapping
Frames from the LAN interface can be trapped by VLAN ID, Ethernet Type, Broadcast Address, Management
Multicast Address (01:80:C2:xx:xx:xx), Destination Address, or a range of Destination Addresses. Frames from the
WAN interface can be trapped by VLAN ID, Ethernet Type, Broadcast Address, Management Multicast Address
(01:80:C2:xx:xx:xx), Destination Address, a range of destination addresses, or by a user-programmable header
comparison. LAN trapping is enabled in the SU.LPM register. WAN trapping is enabled in the SU.WEM register.
The LAN Trap can only be user configured to monitor one Ethernet port. The selection of LAN port to be monitored
is done with the SU.LPM.LEEP bit. The WAN Trap can only monitor for WAN Extract conditions on one (of the four
possible) Decapsulator (WAN Group) data streams. The selection of the WAN Group to monitor is done with
SU.WEM.WEDS[1:0]. The maximum frame size that may be trapped is 2Kbytes.
8.17.1.1LAN-VLAN Trapping
When trapping frames received on the LAN interface by VLAN ID, the user configures the VLAN IDs (VIDs) to be
trapped using the LAN-VLAN Table. Trapping is then enabled or disabled with the SU.LPM.LEVIT bit. See Section
8.16 for more information on VLAN configuration. Only one LAN Port can be allowed to forward frames to the LAN
Extract Queue (which of the two ports is determined by user configuration). If VLAN Forwarding is enabled, and the
4-bit value returned from the LAN-VLAN Table indicates “Extract”, but the port that the frame is associated with has
not been configured to forward to the LAN Extract queue, then the “Extract” status returned from the VLAN Table is
ignored. For more details on LAN-VLAN Table programming, see Section 8.16.2.
8.17.1.2LAN Ethernet Type Trapping
When trapping frames received on the LAN interface by Ethernet Type, the user can configure and 2-byte Ethernet
Type Field to be trapped in the SU.LEET register. Trapping is then enabled or disabled with the SU.LPM.LEETT
bit. Ethernet Type trapping enables the capture of ARP, BPDU, and other management traffic.
8.17.1.3LAN Ethernet Destination Address Trapping
When trapping frames received on the LAN interface by Unicast Destination Address, the user programs the
Destination Address for extraction into the SU.LEDAL, SU.LEDAM, and SU.LEDAH registers. By using a mask for
the lower two bytes of the DA in the SU.LEDAX register, all of the addresses within a range can be forwarded to
the LAN Extract queue. Trapping is then enabled or disabled with the SU.LPM.LEDAT bit.
When trapping frames received on the LAN interface by management multicast address (01:80:C2:xx:xx:xx), the
user simply enables extraction with the SU.LPM.LMGMTT bit. All trapped frames will be forwarded to the LAN
extract queue.
When trapping frames received on the LAN interface by broadcast address (FF:FF:FF:FF:FF:FF), the user simply
enables extraction with the SU.LPM.LBAT bit. All trapped frames will be forwarded to the LAN extract queue.
8.17.1.4WAN Ethernet Destination Address Trapping
When trapping frames received on the WAN interface by Unicast Destination Address (DA), the user programs the
Destination Address for extraction into the SU.WEDAL, SU.WEDAM, and SU.WEDAH registers. By using a mask
for the lower two bytes of the DA in the SU.WEDAX register, all of the management addresses within a range can
be forwarded to the WAN Extract queue. Trapping is then enabled or disabled with the SU.WEM.WEDAT bit.
When trapping frames received on the WAN interface by management multicast address (01:80:C2:xx:xx:xx), the
user simply enables extraction with the SU.WEM.WMGMTT bit. All trapped frames will be forwarded to the WAN
extract queue.
When trapping frames received on the WAN interface by broadcast address (FF:FF:FF:FF:FF:FF), the user simply
enables extraction with the SU.WEM.WBAT bit. All trapped frames will be forwarded to the WAN extract queue.
Rev: 063008
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