Dell Active Fabric Manager Guide de l'utilisateur Page 32

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Aggregation — A switch that connects to access switches. The role of the aggregation layer is to provide an
interconnect to all the access switches. All the ports on the aggregation switches are used to connect the access,
various racks together. The aggregation switch provides redundancy.
Edge ports — The uplinks on the aggregation and downlinks on the access.
Uplinks — An edge port link on the first two aggregation switches in the VLT fabric that connects to outside the
fabric.
Downlinks — An edge port link that connects the access switches to the access layer. For example, servers or ToR
elements.
Fabric Interlinks (Fabric Links) — The fabric interlink bandwidth is fixed: 10 Gb or 40 Gb.
For a 1-Tier, links that connect a pair of aggregation switches.
For a 2-Tier, links that connect the aggregation switches to the access switches.
For a 3-Tier, links that connect the core, aggregation, and access switches together.
VLT Components
Typical VLT Topology
The VLT domain has VLTi (ICL) links connecting between VLT peers and VLT port-channels connecting to a single
access switch, to a switch stack, a server supporting LACP on its NIC, or to another VLT domain as shown in the
following illustration. The backup-link connected through the out-of-band (OOB) management network. Some hosts can
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