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AR8327-AL1A-R 데이터시트(PDF) 25 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) 25 Page - List of Unclassifed Manufacturers

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Atheros Communications, Inc.
AR8327/AR8327N Seven-port Gigabit Ethernet
Switch
•
25
2.2.1
Transmit
The AR8327 will send out the frame with Atheros Header when header is enabled. The header will
indicate the source port of the frame and frame type and priority. The detail format of Atheros Header
is shown in Table 2-2.
2.3 Receive
The AR8327 will recognize the Atheros Header on receive when the header is enabled. The format is
depicted in Table 2-3.
5'h18
Mirror to CPU
Acl_mirror_to_CPU,
arl_mirror_to_CPU, port_mirror_to_CPU,
offload match mirror
5'h19
Flooding to CPU
Broadcast flooding to CPU,
unknown unicast/multicast flooding to CPU
5'h1A
Forwarding to CPU
Bridging to CPU(ARL DP),
Routing to CPU (offload match),
IGMP hardware join/leave forwarding to CPU, Special DIP
Header/ACL assigned DP
Table 2-2.
Atheros Header Transmit Format Detail
Bits
Name
Description
15:14
Version
The value is 2'b10.
13:11
priority
Frame priority.
10:6
Type
Frame Type, the next table shows the detail.
5:4
reserved
3
Frame_with_tag
The ingress frame is Tagged.
2:0
Source_port_num
The ingress port number.
Table 2-3.
Atheros Header Receive
Bit
Name
Description
15:14
version
The version must be 2'b10
13:11
priority
10:8
0: normal
1: Read/write reg
2: Disable learn
3: Disable offload
4: Disable Learn & offload
7
From_cpu
The bit indicates the forwarding method.
1'b1: The forwarding is based on DP_bit_map and bypass lookup.
1'b0: The forwarding is based on the lookup result.
6:0
DP_bit_map
These bits indicates the forwarding port map. See the description in the
bit From_cpu.
Table 2-1.
Atheros Header Type



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