Anycast IP gateway

A unified IPv4 or IPv6 gateway address for each IP subnet between one or multiple pairs of EVPN multihoming redundancy groups.

Anycast virtual MAC

A unified gateway link-layer MAC address for each IP subnet between one or multiple pairs of EVPN multihoming redundancy groups.

Broadcast, Unknown Unicast and Multicast (BUM)

BUM category network traffic (such as ARP/ND, miss-MAC, and Layer 2 multicast) over local Layer 2 ES trunk port or bridge across IP/VXLAN networks.

Designated Forwarder (DF)

The DF in a VTEP role auto elects the role to forward BUM traffic, preventing duplicates and loops in multihomed Layer 2 networks.

Ethernet Segment (ES)

An ES is a Layer 2 port in access or trunk mode, a part of the bundled links that connects to a directly attached Layer 2 network device.

ES Identifier

The ESI is a unique auto-generated or manually assigned 10-byte value for each ES port. The pair of VTEPs in the same redundancy group auto discovers and synchronizes Layer 2 ES ports to logically bind in a distributed EtherChannel group.

Redundancy Group (RG)

A pair of Catalyst 9000 series switches with a common ESI that supports a loop-free Layer 2 multipath resilient forwarding solution.

Ethernet Virtual Interface (EVI)

An Ethernet virtual network instance that binds each VLAN with a unique L2VNI identifier value that extends the Layer 2 bridge network over the IP routed network.

Ingress Replication (IR)

One-In-N-Out method extending BUM traffic from a local Layer 2 port over IP/VXLAN unicast to a remote targeted VTEP IP.

IP-VRF Route-Target (RT)

RTs are extended BGP community attributes used to control the import and export of IPv4 and IPv6 network prefixes within a logically segmented IP network.

MAC VRF

A virtualized and isolated MAC address forwarding table that supports secure extended Layer 2 bridge-domain for VXLAN enabled networks.

Multicast Replication

One-in-one-out method to extend the BUM traffic from a local Layer 2 port over IP/VXLAN to any remote VTEP registered in a common multicast group.

Non-Designated Forwarder (non-DF)

A VTEP not designated to forward BUM traffic to local VLAN/ES interfaces to prevent Layer 2 loops. The unicast/multicast traffic continues to be forwarded based on Layer 2 or Layer 3 tables.

Network Virtualization Endpoint (NVE)

A system-wide single logical interface that binds all Layer 2 and Layer 3 overlay networks, and supports to encapsulate outgoing and de-encapsulate incoming VXLAN traffic over an IP network.

MAC-VRF Route-Target (RT)

RTs are extended BGP community attributes used to control the import and export of MAC, MAC/IPv4 and MAC/IPv6 individual host prefixes within a logically extended Layer 2 network.

System MAC

MAC address ranges from the system internal pool to use for LACP system ID and other purposes.

Layer 2 Virtual Network Identifier (L2VNI)

A 24-bit value in VXLAN header that assists in maintaining segmentation and extension of local VLAN or bridge-domain between VTEPs.

Layer 3 Virtual Network Identifier (L3VNI)

A 24-bit value in VXLAN header that assists in maintaining IPv4/IPv6 routed data communication within each virtualized IP routing space between VTEPs.

Virtual Extensible Local Area Network (VXLAN)

An overlay networking technology converging routing and bridge networks over IP core networks.