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Use Case 2: 1 Tier Layer 3 with Resiliency (Routed VLT)

When you select a 1 tier Layer 3 with Resiliency (Routed VLT) fabric:

• The uplinks between the 2 aggregation switches and external switch (WAN) supports the Layer 3 protocol (OSPF,

iBGP or eBGP).

• The downlinks from the 2 aggregation switches supports the Layer 2 protocol (VLAN/VRRP or VLAN IP). During the

design phase at the Deployment Topology screen, you select the fabric type and deployment type (topology). In this

example shown below, a Layer 3 with Resiliency (Routed VLT) fabric. Based on the deployment type option selected,

different downlink options are configured in the access tier.

Use Case 3: 2 Tier Layer 2

When you select a 2 tier Layer 2 VLT fabric:

• The fabric links between aggregation and access switches supports the Layer 2 protocol.

• The uplinks between the aggregation switches and external switch (WAN) supports the Layer 3 protocol (OSPF,

iBGP or eBGP).

• The downlinks from the access switches supports the Layer 2 protocol (VLAN or VLAN/VRRP). The default setting on

the pre-deployment screen is VLAN configuration which allows you to configure downlink connections to servers.

Select the “VLAN and VRRP Configuration” option to support redundancy between the access switch and ToR

switches.

Figure 13. Example: 2 Tier Layer 2 VLT Fabric

Use Case 3: 2 tier Layer 3 Distributed Core

When you select a 2 tier Layer 3 distributed core fabric:

• The fabric links between the spine and leaf switches supports the Layer 3 OSPF routing protocol.

• The uplinks between spine switch and external switch (WAN) supports the Layer 3 protocol (OSPF, iBGP or eBGP).

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Dell Active Fabric Manager Guía de usuario Pagina 57