Static Lags; Static Lag Requirements; Static Aggregation Configuration Rules - Lenovo RackSwitch G8264CS Application Manual

Static LAGs

Static LAG Requirements

1.
2. Determine which switch ports (up to 16) are to become LAG members (the specific
3. Ensure that the chosen switch ports are set to enabled. LAG member ports must
4. Consider how the existing Spanning Tree will react to the new LAG configuration.
5. Consider how existing VLANs will be affected by the addition of a LAG.

Static Aggregation Configuration Rules

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G8264CS Application Guide for ENOS 8.4
When you create and enable a static LAG, the LAG members (switch ports) take on
certain settings necessary for correct operation of the aggregation feature.
Before you configure your LAG, you must consider these settings, along with
specific configuration rules, as follows:
Read the configuration rules provided in the section, "Static Aggregation
Configuration Rules" on page
ports making up the LAG).
have the same VLAN and Spanning Tree configuration.
See Chapter 10, "Spanning Tree Protocols," for Spanning Tree Group configuration
guidelines.
The aggregation feature operates according to specific configuration rules. When
creating LAGs, consider the following rules that determine how a LAG reacts in
any network topology:
 All links must originate from one logical device, and lead to one logical destina‐
tion device. Usually, a LAG connects two physical devices together with multiple
links. However, in some networks, a single logical device may include multiple
physical devices or when using VLAGs (see Chapter 11, "Virtual Link Aggrega‐
tion Groups). In such cases, links in a LAG are allowed to connect to multiple
physical devices because they act as one logical device.
 Any physical switch port can belong to only one LAG.
 Aggregation from third‐party devices must comply with Cisco
technology.
 All ports in a LAG must have the same link configuration (speed, duplex, flow
control), the same VLAN properties, and the same Spanning Tree, storm control,
and ACL configuration. It is recommended that the ports in a LAG be members
of the same VLAN.
 Each LAG inherits its port configuration (speed, flow control, tagging) from the
first member port. As additional ports are added to the LAG, their settings must
be changed to match the LAG configuration.
 When a port leaves a LAG, its configuration parameters are retained.
 You cannot configure a LAG member as a monitor port in a port‐mirroring con‐
figuration.
LAGs cannot be monitored by a monitor port; however, LAG members can be

monitored.
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