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IP178C
Preliminary Data Sheet
Operation
1.
Packet from LAN to WAN
1.1.
PC0 sends a packet to a LAN port with SA equal to PC0 and PVID equal to 1.
1.2.
IP178C forwards the packet to CPU with PVID equal to 1.
1.3.
CPU replaces the SA with locked address PC3, replaces PVID with 2 and sends it to IP178C.
1.4.
IP178C forwards the packet to port7 (WAN port).
PHY0
CPU
7 LAN ports (PVID=1)
MAC8
MAC0
PHY1
MAC1
PHY2
MAC2
PHY7
MAC7
DA
SA
CPU
PC0
PVID
1
DA
SA
CPU
PC0
PVID
1
(1)
(2)
DA
SA
WAN
PC3
PVID
2
(3)
(4)
DA
SA
WAN
PC3
PVID
--
1 WAN ports (PVID=2)
locked SA=PC3
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October 27, 2005
Copyright © 2004, IC Plus Corp.
IP178C-DS-R09