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参数资料
型号： GT-48208
厂商： Galileo Technology Services, LLC
英文描述： Advanced Switched Ethernet Controllers for 10+10/100 BaseX(高级交换式 10+10/100 BaseX以太网控制器)
中文描述： 先进的交换式以太网控制器的10 10/100 BaseX（高级交换式10 10/100 BaseX以太网控制器）
文件页数： 58/135页
文件大小： 1619K
代理商： GT-48208
GT-482xx Switched Ethernet Controllers for 10+10/100 BaseX
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Revision 1.2
29
If (SA has Is=1 or the DA has Id=1 (in the Address Table entries). Forward only to CPU (as inter-
vention)
Else forward as shown in Table 7
Note: "SA found" represents a valid Source Address table entry found in the AddressTable.
"X" represents "Don’t Care"
2.2
Multicast Destination Address:
If the packet is BPDU, see Section 11.3 "Spanning Tree (BPDU) Support" on page 50.
If the packet is an IGMP packet, see Section 7.6 "IGMP Packet Support" on page 35.
If DA=FFFFFFFF and PCR.FilBroad=1 in the recieving port, the packet is discarded.
If DA=FFFFFFFF and PCR.FilBroad=0 and PCR.ForwBroadCPU=1, the packet is forwarded only
to CPU.
If (SA has Is=1 or the DA (multicast) has Id=1 (in the Address Table entries) or GCR.ForwMulti-
CPU=1, forward only to CPU (as intervention)
Else forward as shown in Table 8.
Table 7:
Forwarding of Unicast Destination Address Packet
SA
f ound
?
DA
f ound?
DA’s
fo r w a r d -
mask
includes
r eceive
por t ?
DA is
sta t i c
&
m u ltip le
F o r w a r d t o .. .
XYes
1
No
DA
X
Yes
0
X
Packet Dropped
Yes
No
-
All ports in SA<Forward_Mask> that have
PCR.Forw_Unk=0 (and also to CPU if it is in the forward
mask and GCR.Forw_Unk=1)
No
-
All ports that have PCR.Forw_Unk=0, and also CPU if
GCR.Forw_Unk=1)
Yes
1
Yes
SA<Forward_Mask> bitwise AND DA<Forward_Mask>
No
Yes
1
Yes
DA<Forward_Mask>
Table 8:
Forwarding of Multicast Destination Address Packet
SA
f ound?
Mu lt i c a
st D A
f ound?
DA’s
fo r w a r d -
mask
in cludes
r eceive
por t ?
For w a r d t o...
Yes
1
SA<Forward_Mask> bitwise AND DA<Forward_Mask>
No
Yes
1
DA<Forward_Mask>
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