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CCNP Core > Chap 5 - VLAN Trunks and Etherchannel Bundles > Flashcards

Chap 5 - VLAN Trunks and Etherchannel Bundles Flashcards

1
Q

What are the 4 roles in VTP architecture?

A
  • Server
  • Client
  • Transparent
  • Off
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2
Q

How many versions of VTP are there?

A

3

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3
Q

What is the difference between VTP versions 1 and 2 vs. 3?

A
  • Versions 1 and 2 support VLANs 1 - 1005
  • Version 3 supports VLANs 1 - 4094
  • In VTP version 3 its not enough to be a VTP server, you also have to run the user exec command ‘vtp primary’
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4
Q

What version of VTP is the default?

A

Version 1

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5
Q

If a switch is running VTP version 3 what is the command to enable it as a server?

A

vtp primary’

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6
Q

What are the 3 main types of advertisements in VTP?

A
  • Summary
  • Subset
  • Client Requests
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7
Q

What 2 times is a VTP Summary Advertisement sent, what 4 things does it include, and what does it not include?

A
  • Occurs every 5 minutes or whenever a VLAN is added, removed, or changed
  • Contains VTP version, domain, config revision number, and timestamp
  • Does not contain VLAN information
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8
Q

What is a VTP Subset Advertisement?

A
  • Occurs after a VLAN change
  • Contains all relevant info for switches to make the VLAN change
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9
Q

What is a Client Request Advertisement?

A
  • Occurs when a switch with a lower revision number joins the domain and sees advertisements with higher revision numbers than it has
  • Client is asking for more detailed information.
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10
Q

What happens to the switchport configuration when the VLAN it is assigned to is removed?

A

The switchport moves to VLAN 1.

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11
Q

How often does DTP advertise itself?

A

Every 30 seconds.

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12
Q

What are the 3 modes to use when setting a switchport to trunk?

A
  • Switchport mode trunk
  • Dynamic Desirable
  • Dynamic Auto
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13
Q

What is the IEEE standard for LACP?

A

802.3AD

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14
Q

What are the interfaces called that are part of an Etherchannel?

A

Member interfaces

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15
Q

What’s the downfall when configuring an Etherchannel statically?

A

There is no health integrity check.

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16
Q

What is the multicast MAC address used by PAgP?

A

0100:0CCC:CCCC

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17
Q

What is the protocol code used by PAgP?

A

0x0104

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18
Q

What is the multicast MAC address used by LACP?

A

0180:C200:0002.

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19
Q

What are the 2 negotiating modes used by PAgP?

A

Desirable and Auto

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20
Q

What are the 2 negotiating modes used by LACP?

A

Active and Passive

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21
Q

By default what operating mode do PAgP ports operate in?

A

Silent mode

22
Q

What does PAgP silent mode do?

A

It allows formation of an Etherchannel even though the other side might not be PAgP

23
Q

What does PAgP non-silent mode do?

A

Requires a port to receive a PAgP packet before adding it to an Etherchannel.

24
Q

Which PAgP mode forms an Etherchannel faster - silent or non-silent?

A

Non-silent mode

25
Q

How often does standard LACP send out LACP packets?

A

Every 30 seconds.

26
Q

How often does LACP Fast send out packets?

A

Once every second.

27
Q

What state will an LACP port channel be in when the minimum number of links is not met?

A

Not in Use

28
Q

When configuring an LACP port channel for minumum number of links does that configuration need to be made on both sides?

A

No, but it is recommended.

29
Q

What is a reason for configuring a minimum number of links in an Etherchannel?

A

To accommodate load-balancing hashes

30
Q

In LACP where does the maximum number of interfaces need to be configured?

A

Only on the master switch but best practices say on both switches

31
Q

How does the Master switch determine which member interfaces to make active when there are more than the maximum interfaces available?

A

By examining the LACP Port Priority. Lower priority is preferred. If there is a tie then lower interface number is preferred.

32
Q

In LACP what determines which switch is the Master Switch?

A

The master switch is the switch with the lowest LACP System Priority.

33
Q

How is the LACP System Priority configured?

A

SW1#config t
SW1(config)#lacp system-priority 1

34
Q

What role does LACP Port Priority play?

A

It allows the Master LACP switch to determine which interfaces are active when there are more than the maximum number in the LACP port channel.

35
Q

What 9 parameters must match in order for interfaces to be members of the same port channel?

A
  • Load Interval
  • Storm Control
  • Speed
  • Duplex
  • Access/Trunk
  • Native VLAN
  • Allowed VLANs
  • L2 / L3
  • MTU
36
Q

When troubleshooting an Etherchannel what 5 things should be checked?

A
  • Between 2 devices only
  • All member ports are up/up
  • Both ends are statically configured with LACP/PAgP active on at least one side
  • All member ports are configured exactly the same
  • LACP or PAgP packets are being exchanged
37
Q

How is Load Balancing done on an Etherchannel?

A

Based on a Hash which runs on various packet header fields.

38
Q

What 5 things can the load balancing Hash be based on to Load Balance on an Etherchannel?

A
  • MAC
  • IP Address
  • TCP/UDP
  • IP Address and TCP/UDP
  • Source or Destination
39
Q

Is the Load Balancing method specific to a port channel or to the system?

A

The system.

40
Q

Why should Etherchannels be configured in multiples of 2?

A

To make Load Balancing more effective.

41
Q

Which protocol allows you to specify the maximum number of links in an Etherchannel?

A

LACP

42
Q

Display the VTP status.

A

show vtp status

43
Q

Display the VTP Revision Number.

A

show vtp status

44
Q

Verify the status of a Port-channel.

A

show etherchannel summary

45
Q

3 commands to view Etherchannel Neighbor info.

A
  • R1#show etherchannel port
  • R1#show lacp neighbor detail
  • R1#show pagp neighbor
46
Q

Display the LACP counters.

A

R1#show lacp counters

47
Q

Clear the LACP counters.

A

R1#clear lacp counters

48
Q

Display the PAgP counters.

A

R1#show pagp counters

49
Q

Display whether LACP ports are operating in Fast Mode or Slow Mode.

A

show lacp internal

50
Q

Display the LACP System Priority on a switch.

A

SW1#show lacp sys-id

51
Q

Display the LACP interface priority.

A

show etherchannel port

52
Q

Display the Load Balancing method being used by an Etherchannel.

A

show etherchannel load-balance

CCNP Core (46 decks)

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