Describes how Layer 2 NAT uses hardware-based translation and public IP aliases to enable communication between private endpoints and public subnets across multiple VLANs.
Layer 2 network address translations
This topic explains how Layer 2 network address translations (NAT) enable communication between private and public subnets by assigning unique public IP addresses, translating IPv4 addresses in both directions, and supporting high-performance network segmentation. It also describes the advantages of using hardware-based NAT for improved efficiency and scalability.
Guidelines and limitations for Layer 2 NAT configuration
Use these guidelines when configuring Layer 2 NAT to ensure compatibility, prevent common deployment issues, and address operational and monitoring requirements.
Layer 2 NAT performance and scalability
This topic explains the hardware performance and rule limits for Layer 2 NAT, including scale examples for various inside and outside address combinations.
Configure Layer 2 NAT
Learn how to configure Layer 2 NAT instances to translate inside and outside IP addresses on your switch. This procedure covers creating NAT instances, defining host or subnet translations, and applying them to specific interfaces and VLANs.
Configure Layer 2 NAT on a port channel
Learn how to configure Layer 2 NAT on a logical port-channel interface using LACP. This procedure describes how to create a NAT instance, define inside and outside host translations, and apply the instance to a port-channel to manage traffic across bundled links.
Layer 2 NAT commands
This topic explains the commands that can be used to verify Layer 2 NAT configuration commands on your switch. Use these commands to display instance details, interface settings, and translation statistics, including hardware resource utilization and ARP fixup data.
How Layer 2 NAT handles duplicate IP addresses
This process describes how subnet-based Layer 2 NAT rules enable efficient address translation for multiple devices across overlapping internal address spaces. The NAT device allocates unique outside subnets, creates translation rules, and translates addresses during communication to resolve duplicate IP address conflicts while optimizing rule usage.