![]() Cisco says dual capability allows resiliency in connectivity for servers attached to access or leaf switches with efficient utilization of available bandwidth. ![]() The BGP Control Plane for VXLAN now allows the Cisco Nexus 93 switches to support VXLAN in both multicast flood-and-learn and the BGP-EVPN control plane. While bridged overlays might be simpler to deploy, routed ones are easier to scale out, Cisco says.īGP authentication and security constructs provide more secure multitenancy, Cisco says, and BGP policy constructs can enhance scalability by constraining route updates where they are not needed. The EVPN address family carries both Layer 2 and 3 reachability information, which allows users to build either bridged overlays or routed overlays. EVPN is a Layer 2 VPN technology that uses BGP as a control-plane for MAC address signaling / learning and VPN endpoint discovery. The new control plane uses the Ethernet virtual private network (EVPN) address-family extension of Multiprotocol BGP to distribute overlay reachability information. It removes the need for multicast flood-and-learn to enable VXLAN tunnel overlays for network virtualization. ![]() It is based on Ethernet VPN and is targeted at users who do not want to deploy multicast routing or have scalability concerns with VXLAN flooding-and-learning.Ĭisco says BGP Control Plane for VXLAN will appeal to customers who do not want to deploy multicast routing or who have scalability concerns related to flooding. “It’s a lighter weight (ACI) and some customers will just use this.”īGP Control Plane for VXLAN runs on the standalone mode versions of the Nexus 9000, which requires a software upgrade to operate in ACI mode.Ĭohen sidestepped questions on whether Cisco would now offer another controller just for the BGP Control Plane for VXLAN environments in addition to the ACI APIC and APIC Enterprise Module controllers it now offers.Ĭisco Nexus 9000 customers can use BGP as a control plane for VXLAN overlays. “This is definitely an alternative deployment model,”said Michael Cohen, director of product management in Cisco’s Insieme Networks Business Unit. The ACI fabric is based on VXLAN routing and an application policy controller called Application Policy Infrastructure Controller (APIC). VXLAN, which scales VLAN segmentation to 16 million endpoints, does not specify a control plane and relies on a flood-and-learn mechanism for host and endpoint discovery, which can limit scalability, Cisco says.īGP Control Plane for VXLAN can also serve as an alternative to Cisco’s Application Centric Infrastructure (ACI)control plane for the Nexus 9000s. Cisco Nexus 9000 Series was added a new control plane capability for users and customers not yet opting for or needing a full-blown application policy infrastructure.Ĭisco’s BGP Control Plane for VXLAN is designed to appeal to operators of multitenant clouds looking for familiar BGP routing protocol features with which to scale their networks and make them more flexible for the demands of cloud networking.
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