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18 Cards in this Set
- Front
- Back
What are the standards for the following variants of STP: STP |
STP - 802.1D |
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What are the potential issues with redundant L2 topologies? |
Unicast broadcast storms (circle the network). |
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What is the goal of STP? |
To calculate and implement a loop free L2 topology. It does this by blocking ports where necessary. |
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What are the 4 steps of 802.1D STP? |
Root bridge selection. |
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How is the Root Bridge selected? |
The lowest Bridge ID. |
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Describe the bridge ID. |
8 bytes in length.
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Describe ports costs. |
a. Port costs are based on bandwidth and are assigned to ports to determine Root Ports.
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What are the default port costs for the following link speeds? 10Mbps
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10Mbps - 100
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What are the port states in 802.1D STP? |
Blocking.
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What was the justification for 802.1W RSTP?
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a. Faster topology calculations by replacing the timers with a proposal and agreement structure. |
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Describe the port roles in 802.1W RSTP.
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a. Alternate Port - an alternative Root Port, changeover is very quick. |
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Describe 802.1S MSTP. |
Allows you to define the number of STP topologies in the network. |
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Describe the Spanning-Tree port types. |
a. edge - will enable RSTP and shouldn't be connected to another siwtch. |
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Configure the following:
Mode - rapid-pvst |
Conf |
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Which command will help you to determine the STP mode in use on a switch?
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show spanning-tree summary. |
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Describe an Etherchannel: |
a. Will allow multiple physical links between switches without STP blocking them.
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What are the LACP states? |
a. Active - will actively try to negotiate an Etherchannel with a neighbouring switch. |
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Which LACP mode combination will result in a failed negotiation?
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Passive/Passive. |