Cisco Cisco Nexus 5010 Switch Libro bianco
© 2016 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
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In an IPVLAN-based configuration, the downstream interfaces are used to map the receiving VLAN tag to the VNI.
Please consult the configuration guides for the respective Cisco Nexus switches used to identify which
configuration types are necessary in a specific case.
All vPC dual-homing scenarios are shown using regular server leaf nodes (dedicated services leaf nodes can also
be used).
Target Audience
This document is written for network architects, designers, and planning and implementation teams and application
services and maintenance teams.
Prerequisites
read the current document. The fabric automation document covers many of the fundamental notions and terms
used in the current document.
and
Overview: Layer 2 Domains, Protected Subnets, and East-West Firewalls
In Virtual Extensible LAN (VXLAN) Ethernet virtual private network (EVPN) fabric, the Layer 2 segment has at least
two numerical values identifying it. This document uses both values in the figures:
●
Fabric-significant Layer 2 VXLAN VNI
●
Leaf-node-significant (or switch-port-significant) IEEE 802.1Q VLAN identifier
Traditionally, a given subnet is considered to be a distinct Layer 2 domain in which all workloads within a subnet
receive all broadcast and unknown unicast frames that originate in the domain. The only route for the traffic to
leave this domain traverses its default gateway (Figure 1).
Figure 1. Logical Diagram Showing Hosts in VLAN 101 and a Default Gateway for VLAN 101