New and Changed Information

This chapter contains the following sections:

New and Changed Information in this Release

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

vPC Fast Convergence

A New CLI has been added to enable/disable the vPC optimizations feature.

6.0(2)U6(4)

Creating a vPC Domain

IPv6 over v4 GRE Tunneling

IPv6 in IPv4 with GRE header is now supported.

6.0(2)U6(1)

Configuring a GRE Tunnel

QSFP+ (40-Gb) transceiver

A new QSFP+ (40-Gb) transceiver is now supported on the Cisco Nexus 3000 Series switches. It has to be used in 4 x 10G mode with splitter cable and LR optics.

6.0(2)U5(1)

40-Gigabit Ethernet Interface Speed

Default port mode changed

Starting with Release 6.0(2)U5(1), the default port mode on Cisco Nexus 3132Q and Cisco Nexus 3132CR Series switches after write erase is 32x40G mode.

6.0(2)U5(1)

Port Modes

Global knob for auto-negotiation disable

You can disable auto-negotiation on all 40G interfaces.

6.0(2)U5(1)

Disabling Link Negotiation

MAC-Embedded IPv6 Address

Introduced the MEv6 feature.

6.0(2)U4(1)

MAC-Embedded IPv6 Address

Statistics Collection on Interfaces

Introduced the load-interval command to change the sampling interval for statistics collections on interfaces.

6.0(2)U4(1)

Monitoring Layer 3 Interfaces

DHCP Client Configuration

You can now configure the IPv4 or IPv6 address of a DHCP client on a management interface, or a physical Ethernet interface.

6.0(2)U4(1)

DHCP Client Discovery

VXLAN

VXLANs extend Layer 2 networks across the Layer 3 infrastructure using MAC-in-UDP encapsulation and tunneling for Cisco Nexus 3100 Series switches.

6.0(2)U3(2)

Configuring VXLANs

Resilient Hashing

Added support for Cisco Nexus 3172 switches. Resilient hashing maps traffic flows to physical ports and redistributes traffic from failed links uniformly across the working links.

6.0(2)U3(1)

Resilient Hashing

Downlink Delay

This feature enables you to operationally enable uplink SFP+ ports before downlink RJ-45 ports after a reload on a Cisco Nexus 3048 switch.

6.0(2)U3(1)

Downlink Delay

DHCP Client Configuration

You can configure the IP address of a DHCP client on SVIs by using the ip address dhcp command.

6.0(2)U3(1)

DHCP Client Discovery

Dynamic Port Breakout for Cisco Nexus 3172

The dynamic breakout feature is now supported by Cisco Nexus 3172.

6.0(2)U2(3)

Port Modes

Symmetric Hashing

Symmetric hashing enables bidirectional traffic to use the same physical interface and maps each physical interface in the port channel to a set of flows.

6.0(2)U2(3)

Symmetric Hashing

Resilient Hashing

Resilient hashing maps traffic flows to physical ports and redistributes traffic from failed links uniformly across the working links.

6.0(2)U2(1)

Resilient Hashing

Hashing for NVGRE Traffic

Hashing for NVGRE traffic allows the switch to include the GRE Key field present in the GRE header in hash computations when NVGRE traffic is forwarded over a port channel or an Equal Cost Multipath (ECMP).

6.0(2)U2(1)

Hashing for NVGRE Traffic

Dynamic Port Breakout for Cisco Nexus 3132

The dynamic port breakout feature enables:
  • A 40-GbE port to break out into four 10-GbE ports
  • Four 10-GbE ports to break into a 40-GbE port

6.0(2)U2(1)

40-Gigabit Ethernet Interface Speed

Consistency Checkers

The following consistency checkers were introduced to check for consistency and display the results:
  • Port Channel Membership Consistency Checker
  • Layer 3 Interface Consistency Checker
  • Link State Consistency Checker

6.0(2)U2(1)

SVI Autostate Disable

The SVI Autostate Disable feature enables the Switch Virtual Interface (SVI) to be in the “up” state even if no interface is in the “up” state in the corresponding VLAN.

6.0(2)U2(1)

SVI Autostate Disable

IP-in-IP encapsulation and decapsulation tunnel support

The IP-in-IP encapsulation and decapsulation tunnel support allows you to configure the way in which encapsulated packets are sent from and delivered to tunnel interfaces.

6.0(2)U2(1)

Configuring IP Tunnels

Reset interface configuration to the default configuration

The default interface command allows you to reset an interface to its default configuration.

6.0(2)U2(1)

Default Interfaces

Configuring a Default Interface

Allow mac-address change for SVI and routed port

You can change the default MAC address of the Layer 3 interface by using the mac-address command from the interface configuration mode.

6.0(2)U2(1)

Configuring Q-in-Q VLAN Tunnels

Added support for Q-inQ VLAN tunnels.

6.0(2)U1(1)

Configuring Q-in-Q VLAN Tunnels