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25 Cards in this Set
- Front
- Back
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What is RPVST+?
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Rapid Per VLAN Spanning Tree Plus
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What command configures a switch to use RPVST+?
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spanning-tree mode rapid-pvst
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What are the four RSTP Port Roles?
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Root
Designated Alternate Backup |
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Describe the RSTP root port.
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One port on a switch that has the lowest root path cost to the root.
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Describe the RSTP designated port.
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Port on a LAN segment that has the best root path cost.
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Describe the RSTP alternate port.
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A port with an alternate path to the root bridge.
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Describe the RSTP backup port.
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A port that provides a redundant connection to a segment where another port is already designated.
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What are the three RSTP Port States?
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Discarding
Learning Forwarding |
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Describe the RSTP Forwarding state?
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Incoming frames forwarded; MACs learned
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Describe the RSTP Learning state?
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Drops incoming frames
MACs learned |
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Describe the RSTP Discarding state?
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Incoming frames are dropped
No MACs learned |
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How do RSTP switch handle BPDUs from 802.1D?
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Switch port will operate using the BPDU it received (protocols can coexist) and will revert to 802.1D rules for that port.
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What are the three RSTP Port Types?
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Edge Port
Root Port Point-to-point Port |
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What is an RSTP Edge port?
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A port that connects to a single host and cannot form a loop.
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What is an RSTP Root port?
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Has the best cost to the root.
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What is an RSTP Point-to-point port?
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A port connected to another switch and becomes a designated port.
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What will cause an RSTP Edge port to lose its status?
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Receiving a BPDU
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What determines if a port will be point-to-point?
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Duplex of the link: Full duplex is point-to-point.
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How does RSTP convergence differ from 802.1D?
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Switches use BPDUs to negotiate, not timers.
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What event will cause an RSTP topology change BPDU notification (TC BPDU) to be sent?
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A non-edge port transitioning to the Forwarding state.
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How do you configure a port as an Edge port?
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With the "spanning-tree portfast" command.
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Describe RSTP synchronization.
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RSTP convergence is achieved when all switches decide on the state of their ports.
A “wave effect” in the network of BPDU handshakes as switches become synchronized. |
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What BPDU version does RSTP use?
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2
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What three 802.1D STP states does RSTP Discarding combine?
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Disabled
Blocking Listening |
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Is RSTP compatible with legacy STP?
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Yes
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