Cisco switch configuration link aggregation

Cisco switch configuration link aggregation

The networking is shown in the figure below, using the GNS3 emulator to run two Cisco Layer 3 switches.

SW1 configuration:

SW1(config)#int range g0/0-2
SW1(config-if-range)#switchport 

SW1(config)#int range g0/0-1
SW1(config-if-range)#channel-protocol lacp
SW1(config-if-range)#channel-group 1 mode active
SW1(config-if-range)#switchport trunk encapsulation dot1q
SW1(config-if-range)#switchport mode trunk
SW1(config-if-range)#switchport trunk allow vlan all

SW2 configuration:

SW2(config)#int range g0/0-2
SW2(config-if-range)#switchport

SW2(config)#int range g0/0-1
SW2(config-if-range)#channel-protocol lacp
SW2(config-if-range)#channel-group 1 mode active
SW2(config-if-range)#switchport trunk encapsulation dot1q
SW2(config-if-range)#switchport mode trunk
SW2(config-if-range)#switchport trunk allow vlan all

PC configuration IP address

PC1> ip 192.168.1.1 255.255.255.0
PC2> ip 192.168.1.2 255.255.255.0

View port status

SW1#show ip interface brief 
Interface              IP-Address      OK? Method Status                Protocol
GigabitEthernet0/0     unassigned      YES unset  up                    up      
GigabitEthernet0/1     unassigned      YES unset  up                    up      
GigabitEthernet0/2     unassigned      YES unset  up                    up      
...... 
Port-channel1          unassigned      YES unset  up                    up      

verify connectivity

PC1> ping 192.168.1.2

84 bytes from 192.168.1.2 icmp_seq=1 ttl=64 time=6.181 ms
84 bytes from 192.168.1.2 icmp_seq=2 ttl=64 time=6.007 ms
84 bytes from 192.168.1.2 icmp_seq=3 ttl=64 time=5.537 ms
84 bytes from 192.168.1.2 icmp_seq=4 ttl=64 time=8.162 ms
84 bytes from 192.168.1.2 icmp_seq=5 ttl=64 time=7.173 ms