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VSC7511 датащи(PDF) 97 Page - Microsemi Corporation

номер детали VSC7511
подробное описание детали  4-Port Layer-2 Gigabit Ethernet Switch
PDF  324 Pages
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производитель  MICROSEMI [Microsemi Corporation]
домашняя страница  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

VSC7511 датащи(HTML) 97 Page - Microsemi Corporation

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Functional Descriptions
VMDS-10488 VSC7511 Datasheet Revision 4.2
82
L2_PAYLOAD1
174
8
Payload byte 4 after the frame’s EtherType.
This is specifically for PTP frames.
L2_PAYLOAD2
182
3
Bits 7, 2, and 1 from payload byte 6 after the frame’s
EtherType.
This is specifically for PTP frames.
Table 48 •
IS2 MAC_LLC Key
Field Name
Bit
Width
Description
Layer-2 Information
L2_DMAC
46
48
Frame’s destination MAC address
L2_SMAC
94
48
Frame’s source MAC address
L2_LLC
142
40
LLC header and data after up to two VLAN tags and the
type/length field.
Table 49 •
IS2 MAC_SNAP Key
Field Name
Bit
Width
Description
Layer-2 Information
L2_DMAC
46
48
Frame’s destination MAC address
L2_SMAC
94
48
Frame’s source MAC address
L2_SNAP
142
40
SNAP header after LLC header (AA-AA-03).
Table 50 •
IS2 ARP Key
Field Name
Bit
Width
Description
Layer-2 Information
L2_SMAC
46
48
Frame’s source MAC address
Layer-3 Information
ARP_ADDR_SPACE_OK
94
1
Set if hardware address is Ethernet.
ARP_PROTO_SPACE_OK
95
1
Set if protocol address space is IP.
ARP_LEN_OK
96
1
Set if hardware address length = 6 (Ethernet) and
IP address length = 4 (IP).
ARP_TARGET_MATCH
97
1
Target hardware address = SMAC (RARP).
ARP_SENDER_MATCH
98
1
Sender hardware address = SMAC (ARP).
ARP_OPCODE_UNKNOWN 99
1
Set if ARP opcode is none of the below are
mentioned.
ARP_OPCODE
100
2
0: ARP request
1: ARP reply.
2: RARP request.
3: RARP reply.
L3_IP4_DIP
102
32
Target IPv4 address.
L3_IP4_SIP
134
32
Sender IPv4 address.
Table 47 •
IS2 MAC_ETYPE Key (continued)
Field Name
Bit
Width
Description



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