Table Of Contents

New and Changed Information

New and Changed Information for Cisco NX-OS Releases

New and Changed Information for Cisco NX-OS Release 5.2(1)N(1)

New and Changed Information for Cisco NX-OS Release 5.1(3)N1(1a)

New and Changed Information for Cisco NX-OS Release 5.1(3)N1(1)

New and Changed Information for Cisco NX-OS Release 5.0(3)N2(1)

New and Changed Information for Cisco NX-OS Release 5.0(3)N1(1)

New and Changed Information for Cisco NX-OS Release 5.0(2)N2(1)

New and Changed Information for Cisco NX-OS Release 5.0(2)N1(1)

New and Changed Information for Cisco NX-OS Release 4.2(1)N2(1)

New and Changed Information for Cisco NX-OS Release 4.2(1)N1(1)

New and Changed Information for Cisco NX-OS Release 4.0(1a)N2(1)

New and Changed Information for Cisco NX-OS Release 4.0(1a)N1(1)

New and Changed Information for Cisco NX-OS Release 4.0(0)N1(1a)

New and Changed Information

---

This chapter provides release-specific information for each new and changed feature in the Cisco Nexus 5000 Series NX-OS Layer 2 Interfaces Command Reference. The latest version of this document is available at the following Cisco website:

http://www.cisco.com/en/US/products/ps9670/prod_command_reference_list.html

To check for additional information about this Cisco NX-OS Release, see the Cisco Nexus 5000 Series Switch Release Notes available at the following Cisco website:

http://www.cisco.com/en/US/products/ps9670/prod_release_notes_list.html

New and Changed Information for Cisco NX-OS Releases

This section includes the following topics:

•New and Changed Information for Cisco NX-OS Release 5.2(1)N(1)

•New and Changed Information for Cisco NX-OS Release 5.1(3)N1(1a)

•New and Changed Information for Cisco NX-OS Release 5.1(3)N1(1)

•New and Changed Information for Cisco NX-OS Release 5.0(3)N2(1)

•New and Changed Information for Cisco NX-OS Release 5.0(3)N1(1)

•New and Changed Information for Cisco NX-OS Release 5.0(2)N2(1)

•New and Changed Information for Cisco NX-OS Release 5.0(2)N1(1)

•New and Changed Information for Cisco NX-OS Release 4.2(1)N2(1)

•New and Changed Information for Cisco NX-OS Release 4.2(1)N1(1)

•New and Changed Information for Cisco NX-OS Release 4.0(1a)N2(1)

•New and Changed Information for Cisco NX-OS Release 4.0(1a)N1(1)

•New and Changed Information for Cisco NX-OS Release 4.0(0)N1(1a)

New and Changed Information for Cisco NX-OS Release 5.2(1)N(1)

summarizes the new and changed features for Cisco NX-OS Release 5.2(1)N1(1) and tells you where they are documented.

Table 1 New and Changed Information for Release 5.0(3)N2(1) 

Feature	Description	Where Documented
Dynamic system reserved VLAN range	This feature was introduced.	system vlan reserve show system vlan reserved

New and Changed Information for Cisco NX-OS Release 5.1(3)N1(1a)

summarizes the new and changed features for Cisco NX-OS Release 5.2(1)N1(1a) and tells you where they are documented.

Table 2 New and Changed Information for Release 5.0(3)N2(1) 

Feature	Description	Where Documented
VLAN configuration	This feature was introduced.	vlan configuration

New and Changed Information for Cisco NX-OS Release 5.1(3)N1(1)

summarizes the new and changed features for Cisco NX-OS Release 5.1(3)N1(1) and tells you where they are documented.

Table 3 New and Changed Information for Release 5.1(3)N1(1) 

Feature	Description	Where Documented
Adapter Fabric Extender (Adapter-FEX)	This feature was introduced. The following Adapter-FEX commands were introduced: •feature-set virtualization •interface vethernet •bind •vethernet auto-create •show interface vethernet counters •show interface vethernet •show running-config interface vethernet The following Adapter-FEX-related commands were updated: •shutdown •switchport mode •show running-config interface	bind (virtual Ethernet interface) feature-set virtualization interface vethernet shutdown switchport mode vethernet auto-create show interface vethernet show running-config interface
Encapsulated Remote Switched Port Analyzer (ERSPAN)	This feature was introduced. The following commands were introduced: •destination (ERSPAN) •erspan-id •monitor erspan origin ip-address •shut (ERSPAN) •vrf (ERSPAN) The following commands were updated: •description (SPAN, ERSPAN) •monitor session •source (SPAN, ERSPAN) •show monitor session	description (SPAN, ERSPAN) destination (ERSPAN) erspan-id monitor erspan origin ip-address monitor session shut (ERSPAN) source (SPAN, ERSPAN) vrf (ERSPAN) show monitor session
Clock protocol	This feature was introduced to synchronize the clock protocol. The following command was added: •clock protocol	clock protocol
Virtual Ethernet interfaces	This feature was introduced.	bind (virtual Ethernet interface) capability (virtual Ethernet interface) cdp enable default shutdown (virtual Ethernet interface) description (interface) high-performance host-netio (virtual Ethernet interface) install feature-set virtualization interface vethernet pinning id (virtual Ethernet interface) shutdown switchport access vlan switchport block switchport mode switchport mode private-vlan host switchport private-vlan host-association switchport private-vlan mapping switchport trunk allowed vlan switchport trunk native vlan vethernet auto-create vmware (virtual Ethernet interface) vsi (virtual Ethernet interface) svs veth auto-delete svs veth auto-setup show interface vethernet show interface vethernet counters show interface virtual
Cisco Virtual Machine Fabric Extender (VM-FEX)	This feature was introduced.	feature vmfex feature-set virtualization install feature-set virtualization interface vethernet
Multicast VLAN Registration (MVR)	This feature was introduced.	mvr group mvr type mvr vlan show mvr show mvr groups show mvr interface show mvr members show mvr receiver-ports show mvr source-ports
Ethernet Port Security	This feature was introduced.	clear port-security dynamic feature port-security switchport port-security switchport port-security aging switchport port-security mac-address switchport port-security maximum switchport port-security violation show port-security show running-config port-security show startup-config port-security
FCoE over Adapter-FEX	This feature was introduced to connect a VMware vCenter Server to a Cisco Nexus 5000 Series switch.	connect dvs-name extension-key install certificate protocol vmware-vim remote hostname remote ip address remote port remote vrf svs connection svs veth auto-delete svs veth auto-setup vmware dvs show svs connections
Management SVI	This feature was introduced.	management show interface mgmt
Spanning Tree Protocol (STP) pseudo parameters	This feature was introduced to configure spanning tree pseudo parameters for Layer 2 gateway switches. The following commands were introduced: •mst (STP) •spanning-tree pseudo-information •vlan (STP) The following command was updated: •show running-config spanning-tree	mst (STP) spanning-tree pseudo-information vlan (STP) show running-config spanning-tree
Spanning Tree Protocol (STP) enhancements	The following commands were introduced: •spanning-tree bridge assurance •spanning-tree domain •spanning-tree mst pre-standard •spanning-tree vlan cost •spanning-tree vlan port-priority	spanning-tree bridge assurance spanning-tree domain spanning-tree mst pre-standard spanning-tree vlan cost spanning-tree vlan port-priority
Interface speed enhancement	Interface speed of 100 Mbps and the auto keyword was introduced. The following command was updated: •speed (interface)	speed (interface)
Interface VLAN enhancement	You can set the carrier delay on a serial interface.	carrier-delay
Interface duplex mode	This feature was introduced.	duplex
Interface statistics collection interval	This feature was introduced.	load-interval
Link Aggregation Control Protocol (LACP) graceful convergence	The following command was added: •lacp graceful-convergence	lacp graceful-convergence

New and Changed Information for Cisco NX-OS Release 5.0(3)N2(1)

summarizes the new and changed features for Cisco NX-OS Release 5.0(3)N2(1) and tells you where they are documented.

Table 4 New and Changed Information for Release 5.0(3)N2(1) 

Feature	Description	Where Documented
Flex Links	This feature was introduced. Flex Links, which are two Layer 2 interfaces, where one interface is configured to act as a backup to the other.	feature flexlink switchport backup interface show interface switchport backup show running-config backup show running-config flexlink show startup-config backup show startup-config flexlink show tech-support
Configurable Hash Polynomial	This feature was introduced on a Cisco Nexus 5548 switch and Cisco Nexus 5596 switch.	port-channel load-balance ethernet
Switchport enhancements	Support was added to configure the switch to override the priority of frames arriving on the Cisco IP phone port from connected devices.	switchport priority extend
Voice VLAN	This feature was introduced.	switchport voice vlan

New and Changed Information for Cisco NX-OS Release 5.0(3)N1(1)

summarizes the new and changed features for Cisco NX-OS Release 5.0(3)N1(1) and tells you where they are documented.

Table 5 New and Changed Information for Release 5.0(3)N1(1) 

Feature	Description	Where Documented
SPAN enhancements	Rate limited Switched Port Analyzer (SPAN) is supported on Cisco Nexus 5010 Series and Cisco Nexus 5020 Series switches. Added the switchport monitor rate-limit command.	switchport monitor rate-limit
LLDP	The Link Layer Discovery Protocol (LLDP) is enabled by default on a Cisco NX-OS switch.	feature lldp
Layer 3 interfaces	This feature was introduced. The following Layer 3 interface commands were introduced: •encapsulation dot1q •interface ethernet (Layer 3) •interface loopback •interface vlan •no switchport The following commands were updated to include support for Layer 3 interfaces and subinterfaces: •bandwidth (interface) •delay (interface) •description (interface) •interface port-channel •shutdown •show interface brief •show interface ethernet •show interface port-channel	bandwidth (interface) delay (interface) description (interface) encapsulation dot1Q interface ethernet (Layer 3) interface loopback interface port-channel interface vlan no switchport shutdown Show Commands
Unified ports	Support was added to configure unified ports on a Cisco Nexus 5548UP switch or Cisco Nexus 5596UP switch.	port

New and Changed Information for Cisco NX-OS Release 5.0(2)N2(1)

summarizes the new and changed features for Cisco NX-OS Release 5.0(2)N2(1) and tells you where they are documented.

Table 6 New and Changed Information for Release 5.0(2)N2(1) 

Feature	Description	Where Documented
Support for VTP client and server device mode, VTP file and password, and VTP on an interface	You can configure the VTP device mode as client, server, or off. You can also configure the VTP database file or set the password for the VTP administrative domain. You can enable VTP on an interface.	clear vtp counters vtp (interface) vtp file vtp mode vtp password vtp version Show Commands
Force addition of an interface into a channel group	You can force the addition of the interface into the specified channel group.	channel-group (Ethernet) Show Commands

New and Changed Information for Cisco NX-OS Release 5.0(2)N1(1)

summarizes the new and changed features for Cisco NX-OS Release 5.0(2)N1(1) and tells you where they are documented.

Table 7 New and Changed Information for Release 5.0(2)N1(1) 

Feature	Description	Where Documented
Support for Fabric Extender preprovisioning	You can preprovision a module in a chassis slot of a Cisco Nexus 2000 Series Fabric Extender.	provision slot show provision show running-config exclude-provision show startup-config exclude-provision
Link Aggregation Control Protocol (LACP) port suspension	The following command was added: •lacp suspend-individual	lacp suspend-individual
SNMP notification for VTP domain	You can enable SNMP notifications for a VTP domain.	snmp-server enable traps vtp

New and Changed Information for Cisco NX-OS Release 4.2(1)N2(1)

summarizes the new and changed features for Cisco NX-OS Release 4.2(1)N2(1) and tells you where they are documented.

Table 8 New and Changed Information for Release 4.2(1)N2(1) 

Feature	Description	Where Documented
Hardware Hashing	This feature was introduced.	hardware multicast hw-hash
Link Aggregation Control Protocol (LACP) enhancement	The following command was added: •lacp rate fast	lacp rate fast

New and Changed Information for Cisco NX-OS Release 4.2(1)N1(1)

summarizes the new and changed features for Cisco NX-OS Release 4.2(1)N1(1) and tells you where they are documented.

Table 9 New and Changed Information for Release 4.2(1)N1(1) 

Feature	Description	Where Documented
Layer 2 interface	Support for error-disable (err-disabled) detection was introduced.	errdisable detect cause errdisable recovery cause errdisable recovery interval Show Commands
Ethernet Switched Port Analyzer (SPAN)	The following commands were updated: •monitor session	monitor session
MAC Address Table	The following commands were updated: •clear mac address-table dynamic •mac address-table aging-time •mac address-table notification •mac address-table static	clear mac address-table dynamic mac address-table aging-time mac address-table notification mac address-table static Show Commands
VLAN Trunking Protocol (VTP)	This feature was introduced.	clear vtp counters feature vtp vtp domain vtp mode vtp version Show Commands

New and Changed Information for Cisco NX-OS Release 4.0(1a)N2(1)

summarizes the new and changed features for Cisco NX-OS Release 4.0(1a)N2(1) and tells you where they are documented.

Table 10 New and Changed Information for Release 4.0(1a)N2(1) 

Feature	Description	Where Documented
Layer 2 interface	The following command was updated: •inteface ethernet	interface ethernet

New and Changed Information for Cisco NX-OS Release 4.0(1a)N1(1)

summarizes the new and changed features for Cisco NX-OS Release 4.0(1a)N1(1) and tells you where they are documented.

Table 11 New and Changed Information for Release 4.0(1a)N1(1) 

Feature	Description	Where Documented
Layer 2 interface	The following commands were introduced: •speed (interface) The following command was deprecated:: •svi enable	speed (interface) svi enable
Unidirectional Link Detection (UDLD)	This feature was introduced.	feature udld udld (configuration mode) udld (Ethernet) show udld

New and Changed Information for Cisco NX-OS Release 4.0(0)N1(1a)

summarizes the new and changed features for Cisco NX-OS Release 4.0(0)N1(1a) and tells you where they are documented.

Table 12 New and Changed Information for Release 4.0(0)N1(1a) 

Feature	Description	Where Documented
Layer 2 Ethernet interface	This feature was introduced.	bandwidth (interface) cdp cdp enable channel-group (Ethernet) delay (interface) description (interface) feature interface-vlan instance vlan interface ethernet interface mgmt ip igmp snooping (EXEC) ip igmp snooping (VLAN) link debounce shutdown svi enable Show Commands
Port Channel	This feature was introduced.	interface port-channel port-channel load-balance ethernet Show Commands
Link Aggregation Control Protocol (LACP)	This feature was introduced.	clear lacp counters feature lacp lacp port-priority lacp system-priority Show Commands
Link Layer Discovery Protocol (LLDP)	This feature was introduced.	feature lldp Show Commands
Private VLAN	This feature was introduced.	feature private-vlan private-vlan private-vlan association private-vlan synchronize Show Commands
MAC Address Table	This feature was introduced.	clear mac access-list counters clear mac address-table dynamic mac address-table aging-time mac address-table notification mac address-table static Show Commands
Ethernet Switched Port Analyzer (SPAN)	This feature was introduced.	description (SPAN, ERSPAN) destination (SPAN session) monitor session source (SPAN, ERSPAN) Show Commands
Spaning Tree Protocol (STP)	This feature was introduced.	clear spanning-tree counters clear spanning-tree detected-protocol revision spanning-tree bpdufilter spanning-tree bpduguard spanning-tree cost spanning-tree guard spanning-tree link-type spanning-tree loopguard default spanning-tree mode spanning-tree pathcost method spanning-tree port-priority spanning-tree port type edge spanning-tree port type edge bpdufilter default spanning-tree port type edge bpduguard default spanning-tree port type edge default spanning-tree port type network spanning-tree port type network default spanning-tree vlan Show Commands
Multiple Spanning Tree (MST)	This feature was introduced.	name (MST configuration) spanning-tree mst configuration spanning-tree mst cost spanning-tree mst forward-time spanning-tree mst hello-time spanning-tree mst max-age spanning-tree mst max-hops spanning-tree mst port-priority spanning-tree mst priority spanning-tree mst root spanning-tree mst simulate pvst spanning-tree mst simulate pvst global Show Commands
Switchport	This feature was introduced.	switchport access vlan switchport block switchport host switchport mode switchport mode private-vlan host switchport mode private-vlan promiscuous switchport mode private-vlan trunk switchport private-vlan association trunk switchport private-vlan host-association switchport private-vlan mapping switchport private-vlan trunk allowed vlan switchport private-vlan trunk native Show Commands
VLAN	This feature was introduced.	interface vlan name (VLAN configuration) shutdown (VLAN configuration) state vlan vlan dot1Q tag native Show Commands
Virtual routing and forwarding (VRF)	This feature was introduced.	vrf context