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Lab 09Packet Tracer Challenge

Configure EtherChannel

Link Aggregation

Goal

Bundle multiple links between switches into one logical EtherChannel using LACP, then trunk it — a scored Packet Tracer activity.

EtherChannelLACPPAgPTrunkPacket Tracer
1

Configure EtherChannel

Bundle multiple links between switches into one logical EtherChannel using LACP, then trunk it — a scored Packet Tracer activity.

2

Link Aggregation

Typical Topology

3

S1 ↔ S3: two links (G0/1, G0/2); S2 ↔ S3: two links (G0/1, G0/2). PCs in VLANs; the EtherChannels are trunked.

R1#
! S1 (toward S3)
interface range g0/1-2
 channel-group 1 mode active

! S3 (toward S1)
interface range g0/1-2
 channel-group 1 mode passive
4

Decide the Negotiation Protocol (match the lab)

R1#
interface port-channel 1
 switchport mode trunk
 switchport trunk allowed vlan 10,20

LACP (IEEE 802.3ad): mode active on one side, mode passive on the other. PAgP (Cisco): mode desirable on one side, mode auto on the other. Static: mode on on both sides. The lab usually specifies (commonly LACP active/passive).

5

Create the Channel

R1#
show etherchannel summary
show etherchannel port-channel
show interfaces trunk
show interfaces port-channel 1

Trunk on the Port-Channel

6

Do NOT put the switchport settings only on the physical ports — the scored requirement is usually on the logical channel, and PT checks it there.

Verify

Common Pitfalls