Cisco Nexus 9000 Series Configuration Manual page 22
Nx-os vxlan
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Also See for Nexus 9000 Series:
- Configuration manual (562 pages) ,
- Troubleshooting manual (126 pages) ,
- Quick start configuration manual (6 pages)
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VXLAN BGP EVPN Control Plane
For a data center network, a BGP EVPN control plane provides:
• Flexible workload placement that is not restricted with physical topology of the data center network.
• Optimal east-west traffic between servers within and across data centers
• Eliminate or reduce flooding in the data center.
• Standards based control plane that can be deployed independent of a specific fabric controller.
• Segmentation of Layer 2 and Layer 3 traffic
Note
Distributed anycast gateway refers to the use of anycast gateway addressing and an overlay network to
provide a distributed control plane that governs the forwarding of frames within and across a L3 core
network. The distributed anycast gateway functionality will be used to facilitate flexible workload
placement, and optimal traffic across the L3 core network. The overlay network that will be used is based
on VXLAN.
Cisco Nexus 9000 Series NX-OS VXLAN Configuration Guide, Release 7.x
10
◦ Virtual machines may be placed anywhere in the data center, without considerations of physical
boundaries of racks.
◦ East west traffic between servers/virtual machines is achieved by most specific routing at the first
hop router, where the first hop routing is done at the access layer. Host routes must be exchanged
to ensure most specific routing to and from servers/hosts. Virtual machine mobility is supported
via detecting of virtual machine attachment and signaling new location to rest of the network.
◦ Flooding is reduced by distributing MAC reachability information via BGP EVPN to optimize
flooding relating to L2 unknown unicast traffic. Optimization of reducing broadcasts associated
with ARP/IPv6 Neighbor solicitation is achieved via distributing the necessary information via
BGP EVPN and caching it at the access switches, address solicitation request can then locally
responded without sending a broadcast.
◦ The BGP EVPN control plane approach provides:
◦ IP reachability information for the tunnel endpoints associated with a segment and the hosts
behind a specific tunnel endpoint.
◦ Distribution of host MAC reachability to reduce/eliminate unknown unicast flooding.
◦ Distribution of host IP/MAC bindings to provide local ARP suppression.
◦ Host mobility.
◦ A single address family (BGP EVPN) to distribute both L2 and L3 route reachability
information.
◦ Traffic segmentation is achieved with using VxLAN encapsulation, where VNI acts as segment
identifier.
Overview
- Quick Links:
- Configuring Vxlan
- Configuring Q-In-Vni
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