EtherChannel

A network engineer is configuring EtherChannel between two Cisco Catalyst switches. The ports are configured as access ports in VLAN 10. After configuring the port-channel interface and adding the physical ports, the engineer notices that the EtherChannel does not come up. The show etherchannel summary command shows the port-channel in a down state. What is the most likely cause?

An engineer is troubleshooting an EtherChannel between two switches. The show etherchannel summary output shows that the port-channel is up, but only one physical link is active. The other three links are in a suspended state. The physical ports are all configured identically with the same VLAN allowed. What is the most likely cause?

A network engineer is configuring an EtherChannel between a Cisco switch and a server that supports LACP. The switch ports are configured as trunk ports allowing multiple VLANs. The engineer wants to ensure the EtherChannel forms automatically without manual intervention. Which configuration should be applied on the switch?

A network engineer is troubleshooting an EtherChannel between two Cisco switches. The show etherchannel 1 port-channel command shows the port-channel is up, but traffic is not load-balanced evenly. The engineer notices that all traffic is using only one link. The physical ports are all configured identically. What is the most likely cause?

A network engineer is configuring EtherChannel between two Cisco switches using LACP. The engineer wants to ensure that if fewer than two links are operational, the EtherChannel does not come up. Which command should be configured?

A network engineer is configuring an EtherChannel between two Cisco switches. The engineer wants to use PAgP and ensure that the channel forms only if the neighboring switch is also configured for PAgP. Which mode should be configured on the local switch?

A network engineer is configuring an EtherChannel between a Cisco switch and a router. The switch ports are configured as trunk ports with allowed VLANs 10, 20, and 30. The router is configured with subinterfaces for each VLAN. After configuring the EtherChannel, the engineer notices that the router can ping devices in VLAN 10 but not in VLAN 20 or 30. What is the most likely cause?

A network engineer is troubleshooting an EtherChannel between two Cisco switches. The show etherchannel summary command shows the port-channel is up, but the show interfaces trunk command shows that the trunk is not passing traffic for VLAN 100. The allowed VLAN list on the port-channel interface includes VLAN 100. What is the most likely cause?

A network engineer is configuring an EtherChannel between two Cisco switches. The engineer wants to use LACP and ensure that the local switch is the one that determines which ports are active in the channel. Which configuration should be applied?

A network engineer runs the following command on Switch SW1: SW1# show etherchannel summary Flags: D - down P - bundled in port-channel I - stand-alone s - suspended H - Hot-standby (LACP only) R - Layer3 S - Layer2 U - in use N - not in use, no aggregation f - failed to allocate aggregator M - not in use, minimum links not met u - unsuitable for bundling w - waiting to be aggregated d - default port Number of channel-groups in use: 1 Number of aggregators: 1 Group Port-channel Protocol Ports ------+-------------+-----------+-------------------------------------------- 1 Po1(SU) LACP Gi0/0(P) Gi0/1(P) Gi0/2(s) Gi0/3(D) Based on this output, what can be concluded?

A network engineer runs the following command on Switch SW2: SW2# show interfaces port-channel 1 etherchannel Port-channel1 : Age of the Port-channel = 0d:00h:10m:32s Logical slot/port = 16/1 Number of ports = 2 HotStandby port = null Port state = Port-channel Ag-Inuse Protocol = LACP Ports in the Port-channel: Index Load Port EC state No of bits ------+------+------+----------------+---------- 0 00 Gi0/0 Active 4 1 00 Gi0/1 Active 4 Time since last port bundled: 0d:00h:05m:23s Gi0/1 Based on this output, what can be concluded?

A network engineer runs the following command on Switch SW3: SW3# show etherchannel load-balance EtherChannel Load-Balancing Configuration: src-dst-ip EtherChannel Load-Balancing Operational State: src-dst-ip Based on this output, what can be concluded?

A network engineer runs the following command on Switch SW4: SW4# show etherchannel 1 detail Channel-group number: 1 Group state = L2 Ports in the group: ------------------- Port: Gi0/0 -------- Port state = Up, In-Bundle Channel group = 1 Mode = Active/PagNego Gcchange = - Port-channel = Po1 GC = 0x00010001 Pseudo port-channel = Po1 Port index = 0 Load = 0x00 Flags: S - Device is sending Slow LACPDUs F - Device is sending Fast LACPDUs A - Device is in active mode. P - Device is in passive mode. Local information: LACP port Admin Oper Port Port Port Flags State Priority Key Key Number State Gi0/0 SA bndl 32768 0x1 0x1 0x101 0x3D Partner information: LACP port Admin Oper Port Port Port Flags State Priority Key Key Number State Gi0/0 SA bndl 32768 0x1 0x1 0x102 0x3D Age of the port = 0d:00h:15m:20s Based on this output, what can be concluded?

A network engineer runs the following command on Switch SW5: SW5# show running-config | section interface port-channel interface Port-channel1 switchport mode trunk switchport trunk allowed vlan 1-100,200-300 ! interface Port-channel2 switchport mode access switchport access vlan 10 ! SW5# show interfaces trunk Port Mode Encapsulation Status Native vlan Po1 on 802.1q trunking 1 Port Vlans allowed on trunk Po1 1-100,200-300 Port Vlans allowed and active in management domain Po1 1-100,200-300 Port Vlans in spanning tree forwarding state and not pruned Po1 1-100,200-300 Based on this output, what can be concluded?

A network engineer runs the following command on Switch SW6: SW6# show etherchannel 3 summary Flags: D - down P - bundled in port-channel I - stand-alone s - suspended H - Hot-standby (LACP only) R - Layer3 S - Layer2 U - in use N - not in use, no aggregation f - failed to allocate aggregator M - not in use, minimum links not met u - unsuitable for bundling w - waiting to be aggregated d - default port Number of channel-groups in use: 1 Number of aggregators: 1 Group Port-channel Protocol Ports ------+-------------+-----------+-------------------------------------------- 3 Po3(RU) PAgP Gi0/0(P) Gi0/1(P) Gi0/2(I) Based on this output, what can be concluded?

A network engineer runs the following command on Switch SW7: SW7# show interfaces port-channel 1 Port-channel1 is up, line protocol is up (connected) Hardware is EtherChannel, address is aaaa.bbbb.cccc (bia aaaa.bbbb.cccc) Description: Link to Core Internet address is 192.168.1.1/30 MTU 1500 bytes, BW 2000000 Kbit/sec, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Full-duplex, 1000Mb/s, link type is auto, media type is unknown input flow-control is off, output flow-control is unsupported ARP type: ARPA, ARP Timeout 04:00:00 Last input 00:00:00, output 00:00:00, output hang never Last clearing of "show interface" counters never Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue: 0/40 (size/max) 5 minute input rate 1000 bits/sec, 2 packets/sec 5 minute output rate 500 bits/sec, 1 packets/sec 12345 packets input, 1234567 bytes, 0 no buffer Received 0 broadcasts (0 IP multicasts) 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 watchdog, 0 multicast, 0 pause input 0 input packets with dribble condition detected 67890 packets output, 9876543 bytes, 0 underruns 0 output errors, 0 collisions, 2 interface resets 0 unknown protocol drops 0 babbles, 0 late collision, 0 deferred 0 lost carrier, 0 no carrier, 0 pause output 0 output buffer failures, 0 output buffers swapped out Based on this output, what can be concluded?

A network engineer runs the following command on Switch SW8: SW8# show etherchannel 2 detail | include "Port state|Port: Gi|Partner" Port: Gi0/0 Port state = Up, In-Bundle Port: Gi0/1 Port state = Up, In-Bundle Port: Gi0/2 Port state = Down, Not-In-Bundle Partner information: Gi0/0: Partner state = bndl Gi0/1: Partner state = bndl Gi0/2: Partner state = down Based on this output, what can be concluded?

A network engineer runs the following command on Switch SW9: SW9# show etherchannel 4 port-channel Port-channels in the group: --------------------------- Port-channel: Po4 (Primary Aggregator) Age of the Port-channel = 0d:00h:20m:10s Logical slot/port = 16/4 Number of ports = 3 HotStandby port = null Port state = Port-channel Ag-Inuse Protocol = LACP Ports in the Port-channel: Index Load Port EC state No of bits ------+------+------+----------------+---------- 0 00 Gi0/0 Active 4 1 00 Gi0/1 Active 4 2 00 Gi0/2 Standby 4 Time since last port bundled: 0d:00h:15m:00s Gi0/1 Based on this output, what can be concluded?

Consider the following configuration snippet: interface Port-channel1 switchport mode trunk switchport trunk allowed vlan 10,20,30 ! interface GigabitEthernet0/1 channel-group 1 mode active ! interface GigabitEthernet0/2 channel-group 1 mode passive What is the effect of this configuration?

Given the following configuration: interface Port-channel1 no switchport ip address 192.168.1.1 255.255.255.0 ! interface GigabitEthernet0/1 no switchport channel-group 1 mode on ! interface GigabitEthernet0/2 no switchport channel-group 1 mode on Which statement is true about this EtherChannel?

Examine the following configuration: interface Port-channel1 switchport mode trunk ! interface GigabitEthernet0/1 switchport mode trunk channel-group 1 mode desirable ! interface GigabitEthernet0/2 switchport mode access channel-group 1 mode desirable What is the problem with this configuration?

Consider this configuration: interface Port-channel1 switchport mode trunk switchport trunk native vlan 999 ! interface GigabitEthernet0/1 switchport mode trunk switchport trunk native vlan 999 channel-group 1 mode active ! interface GigabitEthernet0/2 switchport mode trunk switchport trunk native vlan 999 channel-group 1 mode active What is the effect of the 'switchport trunk native vlan 999' command on the EtherChannel?

Given the configuration: interface Port-channel1 switchport mode trunk switchport trunk allowed vlan 10-20 ! interface GigabitEthernet0/1 switchport mode trunk channel-group 1 mode passive ! interface GigabitEthernet0/2 switchport mode trunk channel-group 1 mode passive What is missing for this EtherChannel to form with a neighbor that uses LACP active?

Examine the following configuration: interface Port-channel1 switchport mode trunk ! interface GigabitEthernet0/1 switchport mode trunk channel-group 1 mode active spanning-tree portfast ! interface GigabitEthernet0/2 switchport mode trunk channel-group 1 mode active spanning-tree portfast What is the effect of the 'spanning-tree portfast' command on the member interfaces of this EtherChannel?

What is the default load-balancing method used by Cisco switches for EtherChannel?

Which LACP mode must be configured on at least one side of an EtherChannel for the channel to establish?

What is the maximum number of active member links supported in a single EtherChannel on Cisco Catalyst switches?

Drag and drop the steps of LACP EtherChannel negotiation and bundle formation into the correct order, from first to last.

Drag and drop the steps of configuring a Layer 2 EtherChannel using PAgP into the correct order, from first to last.

Drag and drop the steps of troubleshooting a failed EtherChannel bundle into the correct order, from first to last.

Drag and drop the steps of PAgP EtherChannel negotiation steps into the correct order, from first to last.

Drag and drop the steps of LACP active/passive mode negotiation into the correct order, from first to last.

Drag and drop the steps of PAgP EtherChannel negotiation into the correct order, from first to last.

Drag and drop the steps of EtherChannel load-balancing hash configuration into the correct order, from first to last.

Drag and drop the steps of LACP active/passive mode negotiation into the correct order, from first to last.

Drag and drop the steps of Layer 3 EtherChannel (routed port-channel) setup into the correct order, from first to last.

Drag and drop the steps of EtherChannel load-balancing hash configuration into the correct order, from first to last.

Drag and drop the steps of EtherChannel troubleshooting and verification steps into the correct order, from first to last.

Drag and drop the steps of Layer 3 EtherChannel (routed port-channel) setup into the correct order, from first to last.

Drag and drop the steps of EtherChannel troubleshooting and verification into the correct order, from first to last.

Drag and drop each EtherChannel protocol on the left to its matching vendor on the right.

Drag and drop each LACP port mode on the left to its matching negotiation behavior on the right.

Drag and drop each PAgP port mode on the left to its matching negotiation behavior on the right.

Drag and drop each EtherChannel protocol on the left to its matching vendor on the right.

Drag and drop each EtherChannel load-balance method on the left to its matching hashing input on the right.

Drag and drop each EtherChannel port state on the left to its matching description on the right.

Drag and drop each LACP port mode on the left to its matching negotiation behavior on the right.

Drag and drop each PAgP port mode on the left to its matching negotiation behavior on the right.

Drag and drop each EtherChannel load-balance method on the left to its matching hashing input on the right.

Drag and drop each EtherChannel port state on the left to its matching description on the right.

Which two statements about EtherChannel load balancing are true? (Choose two.)

Which three statements about LACP (Link Aggregation Control Protocol) are true? (Choose three.)

Which two statements about PAgP (Port Aggregation Protocol) are true? (Choose two.)

Which three statements about EtherChannel configuration and verification are true? (Choose three.)

Which two statements about EtherChannel load balancing are true? (Choose two.)

Which three statements about LACP (Link Aggregation Control Protocol) are true? (Choose three.)

Which two statements about EtherChannel configuration and verification are true? (Choose two.)

Which three statements about PAgP (Port Aggregation Protocol) are true? (Choose three.)