Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 175)

Multi-Service IronWare Switching Configuration Guide 145
53-1003036-02
Chapter
6
Brocade NetIron CES and Brocade NetIron CER Link
Aggregation
This chapter describes how to configure Link Aggregation Groups (LAG) for Brocade NetIron CES
and Brocade NetIron CER devices.
NOTE
The terms LAG and LAG groups are used interchangeably in this guide.
LAG formation rules
Multi-Service IronWare software supports the use a single interface to configure any of the
following LAG types:
• Static LAGs– Manually-configured aggregate link containing multiple ports.
• Dynamic LAG – Uses the Link Aggregation Control Protocol (LACP), to maintain aggregate links
over multiple ports. LACP PDUs are exchanged between ports on each device to determine if
the connection is still active. The LAG then shuts down ports whose connection is no longer
active. A syslog message is generated when the LAG is brought down because of he
trunk-threshold being reached.
• Keepalive LAG – Establishes a single connection between a single port on 2 devices. LACP
PDUs are exchanged between the ports to determine if the connection between the devices is
still active. If it is determined that the connection is no longer active, the ports are blocked.
Follow these rules when configuring LAGs:
• You cannot configure a port concurrently as a member of a static, dynamic, or keepalive LAG
• Any number or combination of ports between 1 and 12 within the same device can be used to
configure a LAG. The maximum number of LAG ports is checked when adding ports.
• All ports configured in a LAG must be of equal bandwidth. For example all 10 Gbps ports.
• All ports configured in a LAG must be configured with the same port attributes.
• LAG formation rules are checked when a static or dynamic LAG is deployed.
• A LAG must have the primary port selected before it can be deployed.
• All ports configured in a LAG must reside in the same VLAN.
• All dynamic LAG ports must have the same LACP BPDU forwarding configuration.
Layer 2 requirements
The LAG is rejected if the LAG ports:
• Do not have the same untagged VLAN component.
• Do not share the same VLAN membership and do not share the same uplink VLAN
membership.