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Cisco APIC Layer 2 Networking Configuration Guide, Release 6.2(x)

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Cisco APIC Layer 2 Networking Configuration Guide, Release 6.2(x)

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About this content

Trademarks

What's Changed in this guide

What's Changed in this guide

Cisco ACI Forwarding

ACI Fabric Optimizes Modern Data Center Traffic Flows
VXLAN in ACI
Layer 3 VNIDs facilitate transporting inter-subnet tenant traffic
Transmission of Spanning Tree Protocol BPDU

Prerequisites for Configuring Layer 2 Networks

Layer 2 Prerequisites

Networking Domains

Networking domains
About Bridge Domains
Virtual Machine Manager Domain Main Components
Virtual Machine Manager Domains
Configure a Physical Domain

Bridging

Bridged interface to an external router
Bridge domains and subnets
Create a tenant, VRF, and bridge domain using the GUI
Create a tenant, VRF, and bridge domain using the NX-OS style CLI
Enforced bridge domains
Flood in encapsulation for all protocols and proxy ARP across encapsulations

EPGs

Endpoint groups
Deploy an EPG on a specific node or port using the GUI
Deploy an EPG on a specific port with APIC using the NX-OS style CLI
Domains, attachable access entity profiles, and VLAN for EPG deployment
Create domains and VLANS to deploy an EPG on a specific port using the GUI
Create AEP, domains, and vlans to deploy an EPG on a specific port using the NX-OS style CLI
Overlapping VLAN validation
Validate overlapping VLANs using the GUI
Deploy an application EPG through an AEP to multiple ports
Deploy an EPG through an AEP to multiple interfaces using the APIC GUI
Intra-EPG endpoint isolation
Intra-EPG isolation for bare metal servers
Configure intra-EPG isolation for bare metal servers using the GUI
Configure intra-EPG isolation for bare metal servers using the NX-OS style CLI
Intra-EPG Isolation for VMware VDS or Microsoft Hyper-V Virtual Switch
Configuring Intra-EPG Isolation for VMware VDS or Microsoft Hyper-V Virtual Switch using the GUI
Configure intra-EPG isolation for vmware VDS or microsoft Hyper-V virtual switch using the NX-OS style CLI
Intra-EPG isolation enforcement for Cisco ACI Virtual Edge
Configure Intra-EPG Isolation for Cisco ACI Virtual Edge Using the GUI
Choose statistics for isolated endpoints on Cisco ACI Virtual Edge Under the Tenants Tab
View Statistics for Isolated Endpoints on Cisco ACI Virtual Edge Under the Tenants Tab
Choose statistics for isolated endpoints on Cisco ACI Virtual Edge under the virtual networking tab
View statistics for isolated endpoints on Cisco ACI Virtual Edge under the Virtual Networking tab
Configure Intra-EPG Isolation for Cisco ACI Virtual Edge Using the NX-OS Style CLI
Troubleshoot endpoint connectivity
Inspect the endpoint status
Inspect the tunnel interface status
Perform a traceroute between endpoints
Configure atomic counters
Configure a tenant SPAN session using the Cisco APIC GUI
Verify IP-based EPG configurations using the GUI
IP-EPG configuration verification using switch commands

Access Interfaces

Access interfaces
Physical ports configuration
Port channels
Virtual port channels in Cisco ACI
Reflective relay (802.1Qbg)
Configure Port, PC, and vpc connections to FEX devices
Port profile configuration
Edit an interface configuration

FCoE Connections

Supporting Fibre Channel over Ethernet traffic on the Cisco ACI fabric
Requirement: configure global VLAN scope for FCoE
Fibre channel over ethernet supported hardware
FCoE policy, profile, and domain configurations
Deploy FCoE vFC Ports Using the APIC GUI
Deploying EPG Access to vFC Ports Using the APIC GUI
Deploy the EPG to support the FCoE initiation protocol
Undeploy FCoE connectivity using the APIC GUI
Configure FCoE connectivity without policies or profiles using the NX-OS style CLI
Configure FCoE connectivity with policies and profiles using the NX-OS style CLI
Configure FCoE over FEX using NX-OS style CLI
Verify FCoE configuration using the NX-OS style CLI
Undeploying FCoE elements using the NX-OS style CLI
Recommendation: SAN boot with vPC

Fibre Channel NPV

Fibre Channel connectivity in N-Port Virtualization mode
Managing Fibre Channel NPV traffic
SAN A/B separation
SAN port channels
Fibre Channel NPV requirements and limitations
Fibre Channel NPV supported hardware
Fibre Channel NPV interoperability
Configure a native Fibre Channel port profile using the GUI
Configure a native FC port channel profile using the GUI
Deploy Fibre Channel ports
Configure a traffic map for a Fibre Channel port
Configure Fibre Channel interfaces using the CLI
Configure Fibre Channel NPV policies using the CLI
Configure an NPV traffic map using the CLI
Configure FC connectivity using the REST API

802.1Q Tunnels

ACI 802.1Q tunnels
Configure 802.1Q tunnel interfaces using the APIC GUI
Configure 802.1Q tunnels using the NX-OS style CLI
Example: Configure an 802.1Q tunnel using ports with the NX-OS style CLI
Example: Configure an 802.1Q tunnel using port-channels with the NX-OS style CLI
Example: Configure an 802.1Q tunnel using virtual port-channels with the NX-OS style CLI

Q-in-Q Encapsulation Mapping for EPGs

Q-in-Q Encapsulation Mapping for EPGs
Enabling Q-in-Q Encapsulation on Specific Leaf Switch Interfaces Using the GUI
Enabling Q-in-Q Encapsulation for Leaf Interfaces With Fabric Interface Policies Using the GUI
Mapping an EPG to a Q-in-Q Encapsulation-Enabled Interface Using the GUI
Mapping EPGs to Q-in-Q Encapsulated Leaf Interfaces Using the NX-OS Style CLI

Breakout Ports

Configuration of Breakout Ports
Guidelines and Limitations for Dynamic Breakout Ports on Down Links
Guidelines and Limitations for Auto Breakout Ports on Fabric Links
Configuring Breakout Ports With Profiles and Selectors Using the GUI
Configuring Breakout Ports With the Interface Configuration Using the GUI
Configuring Dynamic Breakout Ports Using the NX-OS Style CLI

Proxy ARP

Proxy ARP
Guidelines and Limitations
Proxy ARP Supported Combinations
Configure Proxy ARP Using the Advanced GUI
Configure Proxy ARP Using the Cisco NX-OS Style CLI
Local proxy ARP

Traffic Storm Control

Traffic storm control
Guidelines for storm control configuration
Configure a traffic storm control policy using the GUI
Configure a traffic storm control policy using the NX-OS style CLI
Storm control SNMP traps

MACsec

Macsec
Guidelines and limitations for macsec on switches
Configure macsec for fabric links using the GUI
Configure macsec for access links using the GUI
Configure macsec parameters using the APIC GUI
Configure macsec keychain policy using the GUI
Configure macsec using the NX-OS style CLI

Fabric Port Tracking

Fabric port tracking
Configure fabric port tracking using the GUI

Cisco APIC Layer 2 Networking Configuration Guide, Release 6.2(x)

Traffic Storm Control

Updated: July 7, 2026

This chapter contains the following sections:

Traffic storm control

Explains a traffic storm control mechanism that prevents network disruptions by monitoring and suppressing excessive broadcast, unknown multicast, and unknown unicast traffic on physical interfaces.

Guidelines for storm control configuration

Consider these guidelines and limitations when configuring traffic storm control levels.

Configure a traffic storm control policy using the GUI

Configure a traffic storm control policy to manage and limit excessive traffic on network interfaces, preventing network congestion and performance degradation.

Configure a traffic storm control policy using the NX-OS style CLI

Configure traffic storm control policies to limit broadcast, multicast, and unicast traffic rates on physical ports, port channels, or virtual port channels using percentage-based or packet-per-second thresholds.

Storm control SNMP traps

Describes how to configure storm control SNMP traps on leaf switches for network traffic monitoring.

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