What is FabricPath?
Cisco FabricPath is an innovation in Cisco NX-OS Software that uses routing principles to allow Layer 2 scaling in a way that was not possible before. This technology provides the flexibility and the performance required to make data centers a service for the applications that use them.
Which protocol is used in FabricPath technology?
FabricPath uses the IS-IS routing protocol. It supports multi-area design, and is not dependent on IP. Fabricpath is a Cisco proprietary protocol, found on some of the Nexus switch range, such as the N5K and N7K.
What is use of FabricPath in Nexus?
Introduced by Cisco in Nexus OS software Release 5.1(3), FabricPath allows architects to design highly scalable true Layer 2 fabrics. Similar to the spanning tree, it provides an almost plug-and-play deployment model with the benefits of Layer 3 routing allowing FabricPath networks to scale at an unprecedented level.
What is OTV used for?
Overlay Transport Virtualization (OTV) is a Cisco technology used to connect data centers in various geographical locations without the use of traditional methods such as creating a mesh network of VPNs.
What is the advantage of VXLAN?
VXLAN provides the following advantages: Increases scalability in virtualized cloud environments as the VXLAN ID is 24 bits, which enables you to create up to 16 million isolated networks. This overcomes the limitation of VLANs having the 12 bits VLAN ID, which enables you to create a maximum of 4094 isolated networks.
Why do we need OTV?
Why would I use OTV to extend L2? OTV main use case is for virtual machine workload mobility (vMotion). As mentioned above it is transport agnostic and is purpose built for data center interconnect (DCI) connectivity. It also has built in scaling and protection mechanism (STP, ARP and Unknown unicast suppression).
What is the difference between VXLAN and EVPN?
Any number of switches can be connected in a Clos network or IP fabric, with an EVPN control plane used to extend the overlay between enterprise locations, while VXLAN tunnels are used to stretch Layer 2 between the network endpoints.
What is FabricPath and how does it work?
Cisco’s Fabricpath is scalable and allows for many active uplinks. It does this by creating a layer-2 fabric or mesh of active links between switches. It is able to make all the links active by taking layer-3 concepts, and applying them at layer-2.
How do I enable FabricPath on a Cisco switch?
Enable FabricPath by installing the Fabricpath feature-set, then enabling the feature-set. In Fabricpath, VLANs can be in either Classical Ethernet (CE) mode or Fabricpath mode. The VLAN has the mode applied in VLAN config, as shown below. VLAN mode is locally significant to the switch or VDC.
Is FabricPath layer-2 or layer-3?
All the uplinks in the fabric are layer-2, but they behave like layer-3 ECMP paths. Enable FabricPath by installing the Fabricpath feature-set, then enabling the feature-set.
What is the VLAN Mode in FabricPath?
In Fabricpath, VLANs can be in either Classical Ethernet (CE) mode or Fabricpath mode. The VLAN has the mode applied in VLAN config, as shown below. VLAN mode is locally significant to the switch or VDC.