Link aggregation, Link aggregation overview, Lag formation rules – Brocade BigIron RX Series Configuration Guide User Manual
Page 315: Chapter 8, Link, Aggregation, Chapter 8, “link aggregation
BigIron RX Series Configuration Guide
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Chapter
8
Link Aggregation
In this chapter
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Link aggregation overview
This chapter describes how to configure Link Aggregation Groups (LAG). You can use a single
interface to configure any of the following LAG types:
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Static LAGs – These trunk groups are manually-configured aggregate links containing multiple
ports.
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Dynamic LAGs – This LAG type uses the Link Aggregation Control Protocol (LACP), to maintain
aggregate links over multiple port. LACP PDUs are exchanged between ports on each
switchswitch to determine if the connection is still active. The LAG then shuts down ports
whose connection is no longer active.
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Keep Alive LAGs – In a Keep Alive LAG a single connection between a single port on 2 BigIron
RX switches is established. In a keep alive LAG, LACP PDUs are exchanged between the 2 ports
to determine if the connection between the switches is still active. If it is determined that the
connection is no longer active, the ports are blocked.
NOTE
No trunk is created for “Keep Alive” LAGs
LAG formation rules
Given below are the LAG formation rules:
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You cannot configure a port concurrently as a member of a static, dynamic, or keep-alive LAG
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Any number or combination of ports between 1 and 8 within the same device can be used to
configure a LAG. The maximum number of LAG ports is checked when adding ports to a LAG.
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All ports configured in a LAG must be of equal bandwidth. For example all 10 G ports.
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All ports configured in a LAG must be configured with the same port attributes.
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Trunk formation rules are checked when a static or dynamic LAG is deployed.