Logical IS-IS Interface

The logical IS-IS interface is the mechanism that enables Fabric Extend to connect SPB fabric nodes.

Logical IS-IS interfaces perform the following functions depending on the type of core network:

Fabric Extend uses virtual tunnels in Layer 3 core solutions to connect SPB fabric nodes. These nodes can stretch over IP routed campus networks, service provider Layer 2 core networks, or service provider Layer 3 core networks such as IP MPLS VPNs.

Note

Note

You cannot use VLACP on logical IS-IS interface connections.

Layer 2 Core Network (FE-VID)

If the service provider has a Layer 2 core network, note the following points:

Layer 3 Core Network (FE-IP)

If the service provider has a Layer 3 core network, note the following points: