New and Changed Information

This chapter contains the following sections:

New and Changed Information

The following table provides an overview of the significant changes made to this configuration guide. The table does not provide an exhaustive list of all changes made to this guide or all new features in a particular release.

Feature

Description

Added or Changed in Release

Where Documented

NAT Statistics

Added support for NAT Statistics

6.0(2)A8(9)

Guidelines and Limitations for Dynamic Twice NAT

Verifying NAT Statistics

Clearing NAT Statistics

NAT with ECMP

Added ECMP support for NAT

6.0(2)A8(3)

Guidelines and Limitations for Dynamic Twice NAT

Layer 3 over vPC

Added support for configuring Layer 3 over vPC.

6.0(2)A8(1)

Configuring Layer 3 over vPC

VPC

Added support for VPC in warp mode.

6.0(2)A8(1)

Guidelines and Limitations for vPCs

Viewing Type-1 Inconsistency Check

VRF Aware NAT

This feature is supported.

6.0(2)A7(1)

Information About VRF Aware NAT

IP Event Dampening

This feature is supported.

6.0(2)A7(1)

IP Event Dampening Overview

Link Debounce Timer

This feature is supported.

6.0(2)A7(1)

Debounce Timer Parameters

Twice NAT

This feature was introduced.

6.0(2)A4(1)

Static and Dynamic Twice NAT Overview

TCP State Enhancements

syn-timeout and finrst-timeout timers were introduced.

6.0(2)A4(1)

Timeout Mechanisms

Virtual Port Channels

Added information to configure virtual port channels (vPC).

6.0(2)A3(1)

Configuring Virtual Port Channels

NAT Enhancements

Introduced pool support for dynamic NAT. The support for PAT now includes the use of the global address pool.

6.0(2)A3(1)

Pool Support for Dynamic NAT

40-Gigabit Interface Support

You can enable 40-Gigabit interface speed on the first port of a group of four adjacent ports. Up to 12 interfaces in 40-Gigabit speed are supported.

6.0(2)A1(1)

Configuring Layer 2 Interfaces

Static and Dynamic NAT Translation

Dynamic Network Address Translation (NAT) translates a group of real IP addresses into mapped IP addresses that are routable on a destination network.

6.0(2)A1(1)

Static and Dynamic Twice NAT Overview