Ethernet Switches & Routers

Brocade FastIron - Create a Link Aggregation

by gfcm on ‎04-21-2011 06:15 AM (592 Views)

Brocade Link Aggregation

The Trunk group feature allows you to manually configure multiple high-speed load-sharing links between two Layer 2 Switches or Layer 3 Switches or between a Layer 2 Switch and Layer 3 Switch and a server.

In addition to enabling load sharing of traffic, trunk groups provide redundant, alternate paths for

traffic if any of the segments fail.

  • Trunk groups are manually-configured aggregate links containing multiple ports
  • IEEE 802.3ad link aggregation is a protocol that dynamically creates and manage trunk groups

Static Trunk Groups:

Use the "trunk ethernet <ports>" command to define a trunk group. After trunk groups are defined, use the "trunk deploy" command to activate all queued trunk configurations.

SNAG-0046.jpg

FastIron(config)#trunk ethernet 1/1/10 ethernet 1/1/11

Trunk will be created in next trunk deploy

FastIron(config)#trunk deploy

IEEE 802.3ad link aggregation

Brocade software supports the IEEE 802.3ad standard for link aggregation.

This standard describes the Link Aggregation Control Protocol (LACP), a mechanism for allowing ports on both sides of a redundant link to form a trunk link (aggregate link), without the need for manual configuration of the ports into trunk groups.

When you enable link aggregation on a group of ports, the ports can negotiate with the ports at the remote end of the links to establish trunk groups.

SNAG-0047.jpg

Switch 1

FastIron(config)#interface ethernet 1/1/10

FastIron(config-if-e1000-1/1/10)#link-aggregate configure key 10000

FastIron(config-if-e1000-1/1/10)#link-aggregate active

FastIron(config)#interface ethernet 1/1/11

FastIron(config-if-e1000-1/1/11)#link-aggregate configure key 10000

FastIron(config-if-e1000-1/1/11)#link-aggregate active

Switch 2

FastIron(config)#interface ethernet 1/1/4

FastIron(config-if-e1000-1/1/4)#link-aggregate configure key 5000

FastIron(config-if-e1000-1/1/4)#link-aggregate active

FastIron(config)#interface ethernet 1/1/5

FastIron(config-if-e1000-1/1/5)#link-aggregate configure key 5000

FastIron(config-if-e1000-1/1/5)#link-aggregate active

Key: Every port that is 802.3ad-enabled has a key. The key identifies the group of potential trunk ports to which the port belongs. Ports with the same key are called a key group and are eligible to be in the same trunk group.