Quick Answer: Why Do We Use EtherChannel?

What is an advantage of Pvst +?

What is an advantage of PVST+.

PVST+ requires fewer CPU cycles for all the switches in the network.

PVST+ reduces bandwidth consumption compared to traditional implementations of STP that use CST.

PVST+ optimizes performance on the network through autoselection of the root bridge..

What are two load balancing methods in the EtherChannel technology?

Explanation: Depending on the hardware platform, one or more load-balancing methods can be implemented. These methods include source MAC to destination MAC load balancing or source IP to destination IP load balancing, across the physical links.

What is difference between port channel and EtherChannel?

1 Answer. “EtherChannel” or “Link Aggregation” is the particular technology that allows you to bundle several links between two devices and use them simultaneously as a single interface. “Port-channel” is the name of this virtual interface in IOS.

What is VTP and how it works?

VTP (VLAN Trunking Protocol) is a Cisco proprietary protocol used by Cisco switches to exchange VLAN information. … VTP enables you to create the VLAN only on a single switch. That switch can then propagate information about the VLAN to every other switch on the network and cause other switches to create it.

Is EtherChannel the same as LACP?

EtherChannel and IEEE 802.3ad standards are very similar and accomplish the same goal. … EtherChannel supports both LACP and Cisco’s PAgP, whereas 802.3ad uses LACP. LACP allows for up to 8 active and 8 standby links, whereas PAgP only allows for 8 active links.

Link aggregation enhances or increases the network capacity while maintaining a fast transmission speed while not investing in additional hardware or communications links, thus reducing cost. … LACP works by sending frames (LACPDUs) down all links that have the protocol enabled.

What are two advantages of using LACP?

What are two advantages of using LACP? (Choose two.) It eliminates the need for configuring trunk interfaces when deploying VLANs on multiple switches. It decreases the amount of configuration that is needed on a switch. It provides a simulated environment for testing link aggregation.

What is the native VLAN?

native vlan means that device will never put/insert tag (VLAN ID, in you case “VLAN ID:2”) on Ethernet frame when it leaves port and also when Ethernet frame without tag go into that port device will put/insert tag defined by native vlan ( in you case VLAN ID:2). Of course native vlan relates to trunk port.

How do I view port channel members?

To view the port channel’s status and channel members in a tabular format, use the show interfaces port-channel brief command in EXEC Privilege mode, as shown in the following example.

What is Lacp EtherChannel?

Link Aggregation Control Protocol (LACP) – Link Aggregation Control Protocol is an IEEE protocol, originally defined in 802.3ad, used to form an EtherChannel. This protocol is almost similar to Cisco PAgP. There are different modes in which you can configure your interface.

How does EtherChannel Load Balancing Work?

EtherChannel Load-Balancing Options. EtherChannel load balances traffic across links in the bundle. However, traffic is not necessarily distributed equally among all the links. Frames are forwarded over an EtherChannel link that is based on results of a hashing algorithm.

What are two drawbacks to turning spanning tree off?

What are two drawbacks to turning spanning tree off and having multiple paths through the Layer 2 switch network? (Choose two.)The switch acts like a hub.Port security becomes unstable.The MAC address table becomes unstable.Broadcast frames are transmitted indefinitely.More items…•

What is EtherChannel configuration?

An EtherChannel is a Link Aggregation technology whereby two switches are connected together with multiple interfaces which are bundled together to form a single logical interface (“Port-Channel”) therefore increasing bandwidth between the switches. …

How do I get rid of EtherChannel?

Type smitty chinet and select the interface belonging to your EtherChannel. Change the Current STATE attribute to detach, and press Enter. On the command line type smitty etherchannel . Select Remove an EtherChannel and press Enter.

What is the difference between PAGP and Lacp?

PAGP provides the same negotiation benefits as LACP. Both LACP and PAGP packets are exchanged between switches over Etherchannel capable ports. … LACP is open standard and supported by most of vendors, while PAGP is Cisco proprietary only used between Cisco devices.

What is Lacp used for?

LACP, a subcomponent of IEEE 802.3ad, provides additional functionality for link aggregation groups (LAGs). Use the link aggregation feature to aggregate one or more Ethernet interfaces to form a logical point-to-point link, known as a LAG, virtual link, or bundle.

Does LACP load balance?

LACP Load Balance Algorithm Standard mode of load balancing packets across LACP EtherChannel if per flow so each flow will always get one of the bundled links to get to the other side. … On some switches, you can even change the load balancing so that it works per packet and not per flow, but that is not best practice.

What are three features of Eigrp?

What are three features of EIGRP? (Choose three.)uses the Shortest Path First algorithm.establishes neighbor adjacencies.uses the Reliable Transport Protocol.sends full routing table updates periodically.broadcasts updates to all EIGRP routers.supports equal and unequal cost load balancing.

What are three advantages of using EtherChannel technology?

Benefits of using EtherChannelIncreased Bandwidth: Use EtherChannel and combine two or four links into one logical link. … Provides Redundancy: Since there are many Ethernet links combined into one logical channel, it automatically allows more available links in case one or more links go down.More items…•

How do you use EtherChannel?

The basic process for configuring your EtherChannel interfaces is as follows:Connect to the command-line interface (CLI) your switch. … Access Privileged EXEC mode. … Access Global Configuration mode. … Access Interface Configuration mode. … Change switchport to trunk or access, but all ports must be in the same VLAN.More items…

What are two advantages of EtherChannel choose two?

Configuring the EtherChannel interface provides consistency in the configuration of the physical links. Spanning Tree Protocol ensures redundancy by transitioning failed interfaces in an EtherChannel to a forwarding state. EtherChannel uses upgraded physical links to provide increased bandwidth.