Users Guide

Figure 3. Type 1: Extra Large Distributed Core Fabric Design

Use the Type 1: Extra Large Distributed Core fabric design when:

• The line rate-performance with a fabric oversubscription ratio of 1:1 between the spines and leaves.

• The current and planned uplinks and downlinks on the leaves for the distributed core is less than or

equal to 2048 ports.

For redundancy, each leaf in a large core design can connect 2–16 spines. The Type 1: Extra Large

Distributed Core Design uses a 1:1 spine-to-leaf ratio. As a result, the maximum number of spines for this

design is 16 and the maximum number of leaves is 32.

Each Z9000 or S6000 leaf for the Type 1: Extra Large Distributed Core design has the following:

• 640 Gigabits of fabric interlink (fabric links) maximum capacity to the Spine (16 x 40 Gb)

• 48 ports for server connectivity and WAN connectivity (10 Gb)

Type 2: Large Distributed Core Fabric

Use the Type 2: Large Distributed Core fabric design when:

• You require a 10 Gb fabric interlink (fabric links) bandwidth between the spines and leaves.

• The current and planned uplinks and downlinks on the leaves for the fabric is less than or equal to

2048 ports.

• The leaves act as a switch or ToR-leaf switch. Within the ToR, the downlink protocol can be either

VLAN or VLAN and LAG.

With a Type 2: Large Distributed Core fabric design, the S4810 spines connect to the S4810 leaves at a

fixed rate of 10 Gb. The maximum number of spines is 32 and the maximum number of leaves is 64, as

shown in the following figure.

Supported Fabric Types