HP ProCurve 9304M Installation And Configuration Manual page 235

point link, it asserts the Proposed signal and one of the following occurs (Figure 8.4):
• If the RST BPDU that the port receives is superior to what it can transmit, the port assumes the role of a
Root port. (See the section on "Bridges and Bridge Port Roles" on page 8-23.)
• If the RST BPDU that the port receives is inferior to what it can transmit, then the port is given the role of
Designated port.
NOTE: Proposed will never be asserted if the port is connected on a shared media link.
In Figure 8.4, Port3/Routing Switch 200 is elected as the Root port
Figure 8.4 Proposing and Proposed Stage
Routing Switch 300
Configuring Spanning Tree Protocol (STP) and Advanced STP Features
Port2
Designated port
Proposing
RST BPDU
sent with a
Proposal
flag
Port1
Root port
Proposed
Port2
Port2
Routing Switch 100
Root Bridge
Routing Switch 200
Port3
Port3
Routing Switch 400
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