Cisco Nexus 5000 Series and Cisco Nexus 2000 Series Release Notes, for Cisco NX-OS Release 5.0(2)N1(1) and NX-OS Release 5.0(2)N2(1) OL-22747-02, December 2010)

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Cisco Nexus 5000 Series and Cisco Nexus 2000 Series Release Notes, for Cisco NX-OS Release 5.0(2)N1(1) and NX-OS Release 5.0(2)N2(1)
OL-22747-02
New and Changed Features
Beginning with Cisco NX-OS Release 5.0(2)N2(1), VTP client/server modes are supported for VTP
version 1 and 2. Prior to this release, VTP transparent was the only supported mode. This feature
allows you to provision VLANs at a central point and distribute the VLAN database across a Layer 2
domain.
• VE Ports
This feature allows you to build multi-hop FCoE fabrics by interconnecting multiple fiber channel
forwarders by using the VE Port that functions as a Fiber Channel E-port running on top of a lossless
Ethernet fabric.
The maximum distance between two Cisco Nexus 5000 Series switches is 3000m for FCoE (lossless
Ethernet) traffic. It can be enabled using the pause no-drop buffer-size buffer-size pause-threshold
xoff-size resume-threshold xon-size command.
• DHCP Snooping
Beginning with Cisco NX-OS Release 5.0(2)N2(1), DHCP snooping with option 82 is supported.
DHCP snooping acts like a firewall between untrusted hosts and trusted DHCP servers. DHCP
snooping is enabled on a per-VLAN basis
• Configuration Synchronization enhancements
Import running-config exclude interface Ethernet and RBAC support for configuration
synchronization are supported.
• Increased distance support between the Cisco Nexus 2000 Series Fabric Extender and the Cisco
Nexus 5000 Series Switch
This software release supports up to 3 km between the Cisco Nexus 2000 Series Fabric Extender and
the upstream Cisco Nexus 5000 Series switch. The maximum distance between the Cisco Nexus
2000 Series Fabric Extender and the upstream Nexus 5000 Series switch remains unchanged
(300 m) for FCoE (lossless Ethernet) traffic.
• vPC enhancement features
Several new features have been added to improve the resiliency and operation of vPC, such as the
graceful consistency check, auto recovery, and per-VLAN consistency check.
• Role Based Access Control Support
Beginning with Cisco NX-OS Release 5.0(2)N2(1), you can add, delete, or modify a switch profile
configuration based on Role Based Access Control (RBAC) configurations.
• Channel Group Force
The feature enables you to force the configuration of a LAN port to a channel group.
For more information about the features listed, see the Cisco Nexus 5000 Series and the Cisco Nexus
2000 Series documentation listed in the“Related Documentation” section on page 44.
Cisco NX-OS Release 5.0(2)N1(1)
This section includes the following topics:
• Hardware Features, page 8
• Software Features, page 8