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ICND2-Odom > Ch3-Spanning Tree Protocol Implementation > Flashcards

Ch3-Spanning Tree Protocol Implementation Flashcards

1
Q

What value is typically represented by the System ID Extension field?

A

VLAN ID

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2
Q

What is the default value of the STP Bridge Priority?

A

32,768

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3
Q

The STP Bridge priority can be manually set with the command <b>spanning-tree vlan <i>vlan-id</i> priority <i>x</i></b>. What range of values can be entered for <i>x</i>?

A

0-65,535, but only in multiples of 4096

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4
Q

Per-vlan port costs (interface cost) can be manually configured. What command is used to accomplish this?

A

<b>spanning-tree vlan <i>vlan-id</i> cost<i>x</i></b>.

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5
Q

On a per-interface basis, how is <b>PortFast</b> enabled?

A

spanning-tree portfast [disable]

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6
Q

On a per-interface basis, how is <b>BPDU Guard</b> enabled?

A

spanning-tree bpduguard [enable | disable]

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7
Q

It is sometimes desirable to influence the root bridge election. If the command <b>spanning-tree vlan <i>vlan-id</i> root primary</b> is configured, what value will be used for that switch’s BID priority?

A

If the current root has a base priority higher than 24,576, the local switch uses a base priority of 24,576. If the current root has a base priority lower than 24,576, the local switch will use the highest multiple of 4096 that is lower than 24,576

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8
Q

If the command <b>spanning-tree vlan <i>vlan-id</i> root secondary</b> is configured, what value will be used for that switch’s BID priority?

A

28,672

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9
Q

What command is used to disable (or enable) PortFast globally for all access ports?

A

[no] spanning-tree portfast default

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10
Q

What command is used to disable (or enable) BPDU Guard globally?

A

[no] spanning-tree portfast bpduguard default

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11
Q

What command could be used to verify portfast and/or bpduguard on interface FastEthernet0/4?

A

show spanning-tree interface fa0/4 portfast

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12
Q

What command could be used to verify the global status of Portfast and/or BPDU Guard?

A

show spanning-tree summary

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13
Q

When configuring an Etherchannel, what keywords correspond to PAgP?

A

desirable/auto

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14
Q

When configuring an Etherchannel, what keywords correspond to LACP?

A

active/passive

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15
Q

When using RSTP, what command determines whether a P2P or Shared port type is also an Edge Port?

A

portfast

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16
Q

What are the tiebreakers, in order, in the root and designated port selection processes?

A
  1. Lowest path cost to the root.<br></br>
  2. Lowest neighbor bridge ID<br></br>
  3. Lowest neighbor port priority<br></br>
  4. Lowest neighbor port ID

ICND2-Odom (7 decks)

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