DM8603EP DAVICOM [Davicom Semiconductor, Inc.], DM8603EP Datasheet - Page 83

• Manufacturer Part Number: DM8603EP
• Description: 10/100 Mbps 3-port Ethernet Switch Controller with MII / RMII Interface
• Manufacturer: DAVICOM [Davicom Semiconductor, Inc.]

9.2.19 STP / RSTP Support
are five types of STP Port State (Disabled, Blocking, Listening, Learning and Forwarding state) and three
types of RSTP Port State (Discarding, Learning and Forwarding) for these two protocols. The following figure
is the port state diagram of STP.
listed as below.
Moreover, the behavior of Disabled/Blocking/Listening states in STP must be equal to the behavior of
Discarding state in RSTP in DM8606. The difference between STP and RSTP should be implemented by
CPU. The following statement describes the STP/RSTP port state behavior and software action in DM8603.
Preliminary datasheet
DM8603-12-DS-P01
November 8, 2010
DM8603 supports both Spanning Tree Protocol (STP) and Rapid Spanning Tree Protocol (RSTP). There
But in RSTP, there are only three port states. The port states comparison between STP and RSTP are
For compatibility and design consideration, this function needs the cooperation with external CPU.
STP Port State
Initialization
Forwarding
Forw arding
Pow er-on
L istening
Listening
Disabled
Learning
B locking
L earning
Blocking
10/100 Mbps 3-port Ethernet Switch Controller with MII / RMII Interface
State
State
State
State
RSTP Port State
Forwarding
Discarding
Discarding
Discarding
Learning
D isabled
State
DM8603
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