top of page

ETHERCHANNEL INTERVIEW QUESTIONS & ANSWERS

Writer's picture: Techclick co_inTechclick co_in

Updated: Jan 19

Q: What is EtherChannel?

Ans: EtherChannel is an aggregation or bundling of multiple physical links into a single virtual link.


Q: Benefits of EtherChannel?

Ans:

  • It provides more bandwidth by combining multiple physical links into a single virtual link.

  • It offers redundancy.


Q: What are the parameters to be the same to configure EtherChannel?

Ans:

  • Same duplex

  • Same speed

  • Same VLAN

  • Trunk or access mode must be the same.


Q: How many interfaces can aggregate or bundle using EtherChannel?

Ans: We can aggregate up to 16 interfaces. 8 will be active, and 8 will be standby.


Q: Is EtherChannel Layer 2 or Layer 3?

Ans: EtherChannel is both Layer 2 and Layer 3.


Q: How many types to configure EtherChannel?

Ans:

  1. Manual (Static EtherChannel)

  2. PAgP (Port Aggregation Control Protocol)

  3. LACP (Link Aggregation Control Protocol)


Q: Difference between PAgP and LACP?

Ans:

  • PAgP (Port Aggregation Control Protocol): Cisco proprietary.

  • LACP (Link Aggregation Control Protocol): Open standard.


Q: Can we configure EtherChannel between different devices?

Ans: Yes. EtherChannel can be configured between:

  • Switch to Server

  • Switch to Router


Q: Modes used in PAgP and LACP to form EtherChannel?

Ans:

  • LACP: Active, Passive

  • PAgP: Auto, Desirable


Q: Configuration of EtherChannel?

Ans:

bash

Copy

# int range fa0/1-2 # channel-group 1 mode <on/auto/desirable/active/passive>

Q: How does EtherChannel load balance the traffic?

Ans: EtherChannel uses a load balancing algorithm to send traffic based on one of the following criteria:

  • Source IP

  • Destination IP

  • Source-Destination IP

  • Source MAC

  • Destination MAC

  • Source Port

  • Destination Port




48 views0 comments

Recent Posts

See All

HSRP Interview Questions and Answers

What is HSRP and what is it used for? HSRP stands for Hot Standby Router Protocol. It is a Cisco proprietary protocol that allows two or...

TAgs

Categorys

bottom of page