Lags - HP Brocade 8/24c Developer's Manual

Limitations
The value of LLDP-DCBX for port and switch is not persisted in Brocade Network Advisor. In order to
retrieve the value of this property, a call needs to be executed. As a result, populating this property
for port and switch during an enumerateInstances operation is costly and will lead to a degradation
in discovery timings. The Brocade Network Advisor SMI Agent will populate this property as
Unknown in both Brocade_EthernetSwitch and Brocade_EthernetPort, if the instance is retrieved
through enumerateInstances. Users can get the correct value of this property on demand through
the getInstance() intrinsic operation only.
The value of Brocade_VLANEndPoint is not persisted in Brocade Network Advisor. Brocade Network
Advisor SMI Agent will populate this property as Unknown.

LAGs

Link aggregation allows you to bundle multiple physical Ethernet links to form a single logical trunk
providing enhanced performance and redundancy. The aggregated trunk is referred to as a Link
Aggregation Group (LAG). The LAG is viewed as a single link by connected devices, the Spanning
Tree Protocol (STP), Virtual Local Area Network (VLANs), and so on. When one physical link in the
LAG fails, the other links stay up and there is no disruption to traffic.
Brocade Network Advisor SMI Agent supports discovery of these LAGs. In addition, support will be
provided to create, delete, and modify existing LAGs.
NOTE
To configure links to form a LAG, the physical links must be in the same speed and all links must go
to the same neighboring device.
Data model
There is no SNIA model for LAGs. Some aspects of the Distributed Management Task Force (DMTF)
model are considered while others are completely proprietary. The following detailed notes
describe the class diagram as shown in
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Brocade Network Advisor SMI Agent Developer's Guide
53-1002169-01
The LAG is a protocol endpoint defined at the scope of the switch and is represented by an
instance of Brocade_LAG associated to the scoping system, which is the
Brocade_EthernetSwitch through Brocade_LAGInEthernetSwitch.
The property Brocade_LAG.InterfaceMode indicates whether or not the LAG is in Layer 2 mode
and is writable.
The property Brocade_LAG.OperationalEndPointMode indicates whether the LAG is in access,
trunk mode and is writable.
Each LAG can contain zero or more members. Each LAG member is represented by an instance
of Brocade_LAGPort. The composition is through Brocade_LAGPortInLAG.
The member is also defined at the scope of the switch associated to the scoping system, which
is the Brocade_EthernetSwitch through Brocade_EthernetSwitchHostedLAGPort.
Each Brocade_LAGPort instance represents a concrete Brocade_LANEndPoint of a
Brocade_EthernetPort that has been added to the BrocadeLAG. This relationship between the
Brocade_LAGPort and the Brocade_LANEndPoint is represented as
Brocade_LAGPortOfLANEndPoint.
There is one Brocade_LAGService instance per Brocade_EthernetSwitch. This hosting is
represented by Brocade_LAGServiceInEthernetSwitch.
Figure 29.
CEE switch support
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