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VSC7440 датащи(PDF) 34 Page - Microsemi Corporation

номер детали VSC7440
подробное описание детали  L2/L3 Enterprise Gigabit Ethernet Switch with 10 Gbps Links
PDF  444 Pages
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производитель  MICROSEMI [Microsemi Corporation]
домашняя страница  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

VSC7440 датащи(HTML) 34 Page - Microsemi Corporation

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Functional Descriptions
VMDS-10492 VSC7440 Datasheet Revision 4.2
17
DST when
FWD.DST_MODE is
ENCAP
TYPE_AFTER_POP
134:133
2 bits
0: ETH - Normal Ethernet header, starting
with DMAC.
1: CW.
First 4 bits:
4: IPv4 header.
6: IPv6 header.
Others: MPLS CW (see RFC 4385)
2: MPLS. MPLS shim header follows.
W16_POP_CNT
132:128
5 bits
Number of WORD16 (= 2 bytes) to be
popped by rewriter, starting from
beginning of frame.
DST when
FWD.DST_MODE is
“L3UC”
RSV
191:183
9 bits
Reserved field. Must be set to 0.
ERLEG
182:176
7 bits
Egress router leg.
NEXT_HOP_DMAC
175:128
48 bits
Next hop DMAC. Only used for unicast
routing.
DST when
FWD.DST_MODE is
“L3MC”
RSV
191:152
40 bits
Reserved field. Must be set to 0.
L3MC_GRP_IDX
151:142
10 bits
IP multicast group used for L3 multicast
copies.
ERLEG
141:135
7 bits
Egress router leg.
COPY_CNT
134:128
7 bits
Number of multicast routed copies. Only
used for multicast routing.
VSTAX
127:48
80 bits
VStaX. See VStaX Header, page 20.
Table 2 •
Internal Frame Header Fields (continued)
Field Category
Field Name
Bit
Width
Description



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