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AR8327-AL1A-R 데이터시트(PDF) 51 Page - List of Unclassifed Manufacturers

부품명 AR8327-AL1A-R
상세설명  Seven-port Gigabit Ethernet Switch
PDF  394 Pages
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제조업체  ETC2 [List of Unclassifed Manufacturers]
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AR8327-AL1A-R 데이터시트(HTML) 51 Page - List of Unclassifed Manufacturers

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Atheros Communications, Inc.
AR8327/AR8327N Seven-port Gigabit Ethernet
Switch
•
51
The lookup field will depend on the direction of the frame. For the SNAT, the SP, SIP, protocol in the
frame will be used to match the corresponding field in the table. While doing DNAT, the DP, DIP, and
protocol in the frame are used.
2.19.2
NAPT Entry
There are 1024 entries in the NAPT table. Each entry is 112 bits wide. The detail format is shown in
Table 2-35.
73:72
ACTION
2'b00:Mirror
2'b01:Redirect
2'b10:Copy
2'b11:forward
71
CNT EN
1'b1: counter should be add one, counter number selected by CNT
INDEX
70:68
CNT INDEX
Counter index to select entry match.
67:56
PRIVATE IP
12bits private IP.
The private IP is constructed under the control bit
PRIVATE_IP_BASE_SEL
1'b1: these 12 bits are the private IP bit [19:16] and [7:0].
1'b0: these 12 bits are the private IP bit [11:0].
When do SNAT, compare with frame SIP
When do DNAT, used to change frame DIP
55:48
RANGE
Port number range.
port number start<= port number < port number start+range
47:32
PORT NUM START
Port number start value
When do SNAT, compare to frame SP.
When do DNAT, compare to frame DP.
31:0
SIP
Router SIP.
When do SNAT, used to change frame SIP.
When do DNAT, compare with frame DIP
Table 2-35.
NAPT Entry Table
Bit
Name
Description
111:108
AGING FLAG
15: static
14~1: dynamic
0:entry invalid
107:104
RESERVED
103
CNT EN
1'b1: the frame matched to this entry should be added to counter selected
by CNT INDEX.
102:100
CNT INDEX
Counter index to select counter
99:98
PROTOCOL
2'b00: TCP
2'b01: UDP
2'b10: Reserved
2'b11: GRE
Table 2-34.
Basic NAT Table



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