Chapter 3 - Link Aggregation

Question 1

PAgP modes

Answer 1

• On: No negotiation
• Desirable: Asking if other side wants to play
• Auto: Passively waiting

Question 2

PAgP Channel Establishments

Answer 2

On – On = Yes
Auto/Desirable – Desirable = Yes
Any other mix = No

Question 3

LACP modes

Answer 3

• On: No negotiation
• Active: Asking if other side wants to play
• Passive: Passively waiting

Question 4

LACP Channel Establishments

Answer 4

On – On = Yes
Active/Passive – Active = Yes
Any other mix = No

Question 5

EtherChannel - Configure LACP

Answer 5

#int range f0/1-2
  #channel-group 1 mode active (install channel-group 1 in the interfaces - links to interface port channel 1)
#int port-channel 1 (makes an etherchannel interface)
  #switchport mode trunk (make the new interface a trunk)
  #switchport trunk allowed vlan 1,2,20 (allow vlans to pass through, if there are any)

Question 6

EtherChannel Troubleshooting

Answer 6

show etherchannel summary