參數(shù)資料
型號: GCIXF1002EC
英文描述: Controller Miscellaneous - Datasheet Reference
中文描述: 控制器雜項(xiàng)-數(shù)據(jù)表參考
文件頁數(shù): 63/128頁
文件大?。?/td> 1262K
代理商: GCIXF1002EC
Intel
IXF1002 Dual Port Gigabit Ethernet Controller
Datasheet
63
Buffer 1:
Buffer 2:
Buffer 3:
4.2.2
VLAN Tagging
The IXF1002 supports IEEE P802.1Q Virtual Bridged Local Area Networks (VLAN) standard.
Figure 11
shows the format of a tagged MAC frame. This format is an extension of the basic MAC
frame, as specified in IEEE 802.3 standard (see
Section 6.3
).
Note:
Numbers in parentheses indicate field length in bytes.
The QTag Prefix field is 4 octets long. The first two octets transferred on to the network are called
the Tagged MAC Frame Length/Type field and contain a constant value of 8100H. The following
two octets are called the Tag Control Information field and are subdivided as follows:
A three-bit user priority field
A one-bit Canonical Format Indicator (CFI)
A 12-bit VLAN identifier.
A5458-01
B3
B11 B10 B9
B8
B7
B6
B5
B4
B2
B1
X
X
X
X
X
X
X
X
B12
X
X
X
X
A5459-01
X
X
X
B14 B13
X
X
X
A5460-01
X
X
X
B21 B20
X
X
X
X
B19 B18 B17 B16 B15
X
X
Figure 11. VLAN Tagged MAC Frame Format
A5461-01
Preamble
(7)
(1)
(6)
(6)
(4)
(2)
(46..1500)
(4)
QTag Prefix
Destination
Address
Source
Address
Length/
Type
Data+
Padding
Length/
Type
Control
Information
SFD
FCS
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