SMSC LAN9420 - Manual (Page 131)

Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface
Datasheet
SMSC LAN9420/LAN9420i 131 Revision 1.22 (09-25-08)
DATASHEET
4.4.10 VLAN2 Tag Register (VLAN2)
This register contains the VLAN tag field to identify VLAN2 frames. For VLAN frames the legal frame
length is increased from 1518 bytes to 1522 bytes.
Offset: 00A4h Size: 32 bits
BITS DESCRIPTION TYPE DEFAULT
31:16 RESERVED RO -
15:0 VLAN2 Tag Identifier (VTI2)
This contains the VLAN Tag field to identify the VLAN2 frames. This field is
compared with the 13
th and 14 th bytes of the incoming frames for VLAN2
frame detection.
R/W FFFFh