link aggregation groups (lags)
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Link Aggregation Groups (LAGs)
Steven MoranTECHNICAL INSTRUCTOR
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What’s a LAG?LINK AGGREGATION GROUPS (LAGS)
A collection of multiple physical links combined into a single, logical link.
Traffic sent to the LAG is distributed across all member links.
Aggregates throughput of member links.
Provides resiliency in the event of member link failure.
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Customer Location
LAG requirements in Direct ConnectLINK AGGREGATION GROUPS (LAGS)
•All DX connections in a LAG must: • Use the same bandwidth. • Terminate at the same DX location.
•Maximum of four connections per LAG.
•Maximum of 10 LAGs per Region.
DX Location
AWS Cage Customer
DX Location
AWS Cage Partner
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•Use existing connections, request new connections, or a mix of both.
•You cannot create a LAG with new connections if you would exceed the overall connection limit for the Region.
•Adding existing connections to a LAG will temporarily interrupt connectivity.
LAG CreationLINK AGGREGATION GROUPS (LAGS)
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•Properties • LAG name • Existing connections to use • Number of new connections to
request • Minimum links • Optional tags.
LAG CreationLINK AGGREGATION GROUPS (LAGS)
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•Minimum links identifies the minimum number of functional connections necessary for the entire link to be functional. • If the number of active links
drops below the minimum, the entire LAG connection will become non-operational.
• Default value is 0 (no minimum).
LAG CreationLINK AGGREGATION GROUPS (LAGS)
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•New or existing connections may be added to existing LAGs.
•Connections may not be removed from LAGs if it crosses the minimum links threshold.
LAG CreationLINK AGGREGATION GROUPS (LAGS)
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Customer Location
LAGs and VIFsLINK AGGREGATION GROUPS (LAGS)
•VIFs may be attached to a LAG instead of a single DX connection.
DX Location
AWS Cage Customer
DX Location
AWS Cage Partner
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Customer Location
LAGs and VIFsLINK AGGREGATION GROUPS (LAGS)
•A corresponding customer LAG must be created at the on-prem hardware.
•Add LAG primary port to VIF VLAN.
DX Location
AWS Cage Customer
DX Location
AWS Cage Partner
•VIFs may be attached to a LAG instead of a single DX connection.
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Fast TakeawaysLINK AGGREGATION GROUPS (LAGS)
LAGs improve throughput performance and connection availability.
All DX LAG members must be connections through the same DX Location.
Customer-side LAGs must be created to support VIF traffic.