Module 6 Flashcards
What is EtherChannel?
A link aggregation technology that allows multiple physical Ethernet links to be grouped into one single logical link.
What are the benefits of using EtherChannel?
- Fault-tolerance
- Load sharing
- Increased bandwidth
- Redundancy
What is a port channel in the context of EtherChannel?
The resulting virtual interface created when an EtherChannel is configured.
Which protocols can be used to form EtherChannels?
- Port Aggregation Protocol (PAgP)
- Link Aggregation Control Protocol (LACP)
What does LACP stand for?
Link Aggregation Control Protocol
What does PAgP stand for?
Port Aggregation Protocol
What is the function of LACP?
To negotiate an automatic bundle of ports by sending LACP packets to the other switch.
Which LACP modes exist?
- On
- Active
- Passive
Which PAgP modes exist?
- On
- Desirable
- Auto
True or False: All Ethernet interfaces must support EtherChannel.
True
What must be configured the same for all interfaces in an EtherChannel?
- Speed
- Duplex mode
- VLAN assignment
What command displays the general status of the port channel interface?
show interfaces port-channel
Fill in the blank: An EtherChannel supports the same allowed range of VLANs on all the interfaces in a _______.
[trunking EtherChannel]
What happens if the allowed range of VLANs is not the same across EtherChannel interfaces?
The interfaces do not form an EtherChannel.
What is the maximum number of ports that can be included in a single EtherChannel?
Up to eight compatibly-configured Ethernet ports.
True or False: An EtherChannel can consist of mixed interface types.
False
What is a common issue with EtherChannel configurations?
Assigned ports in the EtherChannel are not part of the same VLAN.
What is the effect of STP on EtherChannel?
STP may block one of the bundles to prevent switching loops.
What command should be used to verify that EtherChannel is operational?
show etherchannel summary
What command allows you to view detailed output of a port channel configuration?
show run | begin interface port-channel
What does the PAgP desirable mode do?
It initiates negotiations with other interfaces by sending PAgP packets.
What is the role of PAgP in EtherChannel?
To help create the EtherChannel link by ensuring configurations are compatible.
What is the primary purpose of EtherChannel?
To increase bandwidth and redundancy between devices.
What should be ensured when configuring trunking on EtherChannel?
Verify the trunking mode on all ports that make up the EtherChannel.
What is the maximum bandwidth provided by Fast EtherChannel?
800 Mbps
What is the maximum bandwidth provided by Gigabit EtherChannel?
8 Gbps
What command displays information about a specific port channel interface?
show etherchannel port-channel
What is EtherChannel?
A link aggregation technology that groups multiple physical Ethernet links into one logical link.
What is the primary purpose of EtherChannel?
To provide fault-tolerance, load sharing, increased bandwidth, and redundancy between devices.
What is a port channel?
The resulting virtual interface when an EtherChannel is configured.
True or False: EtherChannel technology was originally developed by Cisco.
True
List the commands used to verify an EtherChannel configuration.
- show interfaces port-channel
- show etherchannel summary
- show etherchannel port-channel
- show interfaces etherchannel
What are common issues that can prevent an EtherChannel from forming?
- Assigned ports not in the same VLAN
- Different native VLANs
- Inconsistent trunking configurations
- Different allowed VLAN ranges
- Incompatible PAgP and LACP configurations
Fill in the blank: EtherChannel provides _______ because the overall link is seen as one logical connection.
redundancy
What is the function of Spanning Tree Protocol (STP) in relation to EtherChannel?
To block redundant links to prevent switching loops.
What are the two dynamic negotiation protocols used in EtherChannel?
- Port Aggregation Protocol (PAgP)
- Link Aggregation Control Protocol (LACP)
What is a key feature of the EtherChannel operation?
It allows multiple links to be connected without being blocked by STP.
What is the difference between PAgP and LACP in terms of interface bundling?
LACP supports more interfaces bundled into a group compared to PAgP.
True or False: Configuration changes for EtherChannel must be made under the physical interfaces.
False
What is the purpose of Check Your Understanding (CYU) activities?
To help learners gauge their understanding of the content.
What is the recommended activity type for configuring EtherChannel?
Syntax Checker
What is the significance of the command ‘channel-group X mode [desirable | auto | active | passive]’?
It configures the mode for the EtherChannel group.
Fill in the blank: The __________ is a simulation and modeling activity designed to explore skills.
PT Activity
