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Rapid-Spanning Tree Protocol (RSTP)


RAPID SPANNING TREE PROTOCOL

RAPID SPANNING-TREE PROTOCOL IS A NETWORK PROTOCOL. AND OPEN STANDERD.

RSTP IS A SET OF RULES BY WHICH SWITCHES ON THE NETWORK DETERMINE THE BEST WAY TO ROUTE DATA ON THE NETWORK WITHOUT REDUNDANCY.

THIS IS AN ADVANCMENT OF SPANNING-TREE PROTOCOL. THAT PROMOTES HIGH AVAILABILITY AND LOOP FREE TOPOLOGY WITHIN ETHERNET NETWORKS. 

RSTP IS USED TO UP LINK QUICKLY UP DO.

RSTP MAXIMUM TIME FOR LINKED UP IS 3 TO 10 SEC.

RSTP BRIDGE PROTOCOL DATA UNIT (BPDU) IS SEND EVERY 2 SECOND AND HIS HOLD TIME IS 6 SEC.

STATE OF RSTP

DISCARDING:

THIS IS THE INITIAL STATE OF A PORT. IN THIS STATE, THE PORT DOES NOT FORWARD ANY TRAFFIC. 


LEARNING:

IN THIS STATE, THE PORT LEARNS THE MAC ADDRESSES OF THE DEVICES CONNECTED TO IT. 


FORWARDING:

IN THIS STATE, THE PORT FORWARDS TRAFFIC. 


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CONFIGURATION

STEP 1

FIRST YOU HAVE TO TAKE TWO SWITCHES AND 4 COMPUTER.

STEP 2

WE CONFIGURATION SW(1) RSTP.

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STEP 1



STEP 2

GO TO SWITCH(1) ENABLE MODE AND ENTER COMMAND.

Switch# sh spanning-tree 


BY DEFAULT SWITCH PROIRITY IS A(32768). BUT SWITCH IS CONFIGURE BY DEFAULT VLAN 1 
SO SWITCH PRIORITY IS 32768+1= 32769

AFTER THAT GO TO CONIFURATION MODE AND ENTER THIS COMMANDS.

Switch(config)# spanning-tree mode ?

WE ARE CONFIGURED THR RSTP IN SWITCH SO WE ENEWR THE RAPID-PVST.

Switch(config)# spanning-tree mode rapid-pvst 
Switch# sh spanning-tree 

AFTER THE CONFIGURATION IS COMPLETE, WHEN YOU DISCONNECT OR RECONNECT ANY PORT OF SWITCH 1, THE SWITCH WILL IMMEDIATELY UP THE LINK.

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