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List the steps STP uses in selecting the designated port?

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Question added by Micheal Egereugwu , IT TECHNICAL SUPPORT ENGINEER , AFRI-HUB ICT CENTER
Date Posted: 2017/07/23
Gowtham  Raj
by Gowtham Raj , Senior Network Support Engineer , Niagara Networks India Private Limited

STP is Protocol used in Switches.

STP will initially choose the Root Bridge. All ports of the Root Bridge will be Designated ports.

The non-Root Bridge Switches, will have to reach Root Bridge. The shortest path (Interface) to reach the Root-Bridge is Root-port.

The Reamining ports in non-Root Bridges, will be elected either as a Designated port of Alternate port.

The Non-Root Bridge Switches with the best Bridge ID (Priority & Mac-Addres ) will be Designated port and the Other End of the Switch will become Alternate port (Blocked mode ).

 

Arshad Ayub Mohammad
by Arshad Ayub Mohammad , quality supervisior , Ericsson

Lowest Bride ID. After selecting root bridge. Below steps should be follow

Lowest path cost

lowest sender bridge id

lowest port id

 

Fahad Wasim
by Fahad Wasim , Network Support Engr. & CISCO Instructor , Sir Syed University of Engineering & Technology

After selecting Root Port, the port that doesn't block anf able to forward data is designated port.

Micheal Egereugwu
by Micheal Egereugwu , IT TECHNICAL SUPPORT ENGINEER , AFRI-HUB ICT CENTER

lowest root bid

lowest rpc to root bridge

lowest sender bid

lowest sender port id

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