The introduction of a Time To Live field in the frame header which is decremented at each FabricPath hop.Responsible for encapsulation, de-encapsulation and forwarding of data packets across a Fabricpath network.įabricpath introduces its own unique data plane.The IS-IS adjacencies are then used to exchange routing information used to populate the Unicast Layer 2 Routing information (U2RIB).
The assignment can be either automatically with the help of DRAP or can be assigned manually. All the nodes in FabricPath domain are assigned unique 12-bit Switch ID (SID).Responsible for building and disseminating information about reachability of devices within the network.Ĭan be broken down to two main functionality. Spine Switch – FP backbone switch with all the ports are in FP domain only.įP Core Ports – Links on Leaf up to Spine for Spine to Spain (switchport with “switchport mode fabricpath links).ĬE Edge Ports – Links on Leaf connecting to regular CE Domain (switchports without “switchport mode fabricpath”). Leaf Switch – Connects to CE Domain to FP Domain. IS-IS is not use for advertisement of MAC addresses – Only uses to compute SPT between all FabricPath Nodes.Ĭlassical Ethernet (CE) – Normal Ethernet network. IS-IS is multi-area (Level) routing protocol that has no IP dependencies and easily extensible using custom TLVs. Layer 2 Routing – “MAC in MAC” Encapsulation.Īlternative to running Spanning Tree protocol – allows you to build arbitrary topologies (full/partial mesh, Triangle, Square, etc.).Ĭonversational MAC learning (Only learn SRC MAC if you already know DST MAC).įabricPath uses IS-IS to replace Spanning Tree.
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