Mastering EtherChannel - CCNA Guru Multan

Mastering EtherChannel: Hands-On Lab Guide

Exclusive Tutorial from CCNA Classes in Multan

Saeed Ahmad - CCNA Guru

NetAcad Certified Instructor

As part of our comprehensive CCNA training in Multan at Computer College, we emphasize practical, hands-on learning. This EtherChannel lab tutorial is exactly what we cover in our Packet Tracer sessions.

What is EtherChannel?

EtherChannel is a port link aggregation technology that allows multiple physical switch ports to be bundled into one logical channel.

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Increased Bandwidth

Combine multiple links into single logical link

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Redundancy

Automatic failover if one link fails

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Load Balancing

Traffic distributed across all links

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Cost Effective

Better utilization of existing hardware

Lab Scenario

Network Topology:

SW1 (Switch 1) ←→ SW2 (Switch 2)
• 3 FastEthernet links: Fa0/1-3
• VLAN 10: Sales (192.168.10.0/24)
• VLAN 20: Marketing (192.168.20.0/24)
• Protocol: LACP

Step-by-Step Configuration

1. Basic Switch Configuration

! On both switches SW1 and SW2
SW1> enable
SW1# configure terminal
SW1(config)# hostname SW1

2. Create VLANs

! Configure on both switches
SW1(config)# vlan 10
SW1(config-vlan)# name Sales
SW1(config-vlan)# vlan 20
SW1(config-vlan)# name Marketing

3. EtherChannel with LACP

! On SW1
SW1(config)# interface range fa0/1-3
SW1(config-if-range)# switchport mode trunk
SW1(config-if-range)# channel-group 1 mode active
SW1(config-if-range)# exit
SW1(config)# interface port-channel 1
SW1(config-if)# switchport trunk allowed vlan 10,20

Verification Commands

SW1# show etherchannel summary
SW1# show interfaces port-channel 1
SW1# show interfaces trunk
SW1# show vlan brief

Expected Output

Group Port-channel Protocol Ports

------+-------------+-----------+---------------

1 Po1(SU) LACP Fa0/1(P) Fa0/2(P) Fa0/3(P)

Common Issues & Solutions

Mismatched VLAN Configurations

Ensure both switches have same VLAN database

Different EtherChannel Protocols

Use same protocol (LACP/PAgP) on both sides

Port Security Conflicts

Disable port security on EtherChannel interfaces

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