eNSP - LACP (link aggregation control protocol)

IEEE 802.3ad (LACP) is a technique that helps to increase throughput and to provide redundancy by bundling multiple physical interfaces into a logical one named Eth-trunk. Trunking let us implement load balancing and higher reliability.

topology:

1 - Define which switch is the ACTOR by setting the system priority ( the lower the number the higher the priority ).

[LSW4] lacp priority 100

2 - Chose which method of link aggregation will be used Static / Manual and set the number of maximum active links.

[LSW4] interface eth-trunk 1

[LSW4-Eth-Trunk1] mode lacp-static

[LSW4-Eth-Trunk1] max active-linknumber 2

[LSW4-Eth-Trunk1] quit

3 - Add interfaces to eth-trunk and set priority ( interfaces with higher priority will become active upon link failure ).

[LSW4] interface g0/0/1

[LSW4-GigabitEthernet0/0/1] eth-trunk 1

[LSW4-GigabitEthernet0/0/1] lacp priority 100
[LSW4-GigabitEthernet0/0/1] interface g0/0/2

[LSW4-GigabitEthernet0/0/2] eth-trunk 1

[LSW4-GigabitEthernet0/0/2] lacp priority 100
[LSW4-GigabitEthernet0/0/2] interface g0/0/3

[LSW4-GigabitEthernet0/0/3] eth-trunk 1

[LSW4-GigabitEthernet0/0/3] lacp priority 100
[LSW4-GigabitEthernet0/0/3] interface g0/0/4

[LSW4-GigabitEthernet0/0/4] eth-trunk 1

[LSW4-GigabitEthernet0/0/4]quit

4 - Configure LSW5 to be the PARTNER

[LSW5] interface eth-trunk 1

[LSW5-Eth-Trunk1] mode lacp-static

[LSW5-Eth-Trunk1] quit

[LSW5] interface g0/0/1

[LSW5-GigabitEthernet0/0/1] eth-trunk 1

[LSW5-GigabitEthernet0/0/1] interface g0/0/2

[LSW5-GigabitEthernet0/0/2] eth-trunk 1

[LSW5-GigabitEthernet0/0/2] interface g0/0/3

[LSW5-GigabitEthernet0/0/3] eth-trunk 1

[LSW5-GigabitEthernet0/0/3] interface g0/0/4

[LSW5-GigabitEthernet0/0/4] eth-trunk 1

[LSW5-5GigabitEthernet0/0/4]quit

5 - Display configurations on LSW4

[LSW4] display eth-trunk 1

Interface GigabitEthernet 0/0/2 will became active if one of the selected links goes down, due to the priority number configured in the previous steps.

6.

[LSW4] interface g0/0/1

[LSW4-GigabitEthernet0/0/1] shutdown

[LSW4-GigabitEthernet0/0/1] quit

[LSW4] display eth-trunk 1