Layer 2 Switching Configuration Guide, Cisco DCNM for LAN, Release 5.x
New and Changed Information
Downloads: This chapterpdf (PDF - 362.0 KB) The complete bookPDF (PDF - 4.22 MB) | Feedback

New and Changed Information

New and Changed Information

As of Cisco DCNM Release 5.2, Cisco Fabric Manager and Cisco Data Center Network Manager are merged into one unified product called Cisco Data Center Network Manager (DCNM) that can manage both LAN and SAN environments. As a part of this product merger, the name Cisco DCNM for SAN replaces the name Cisco Fabric Manager.

The following documentation changes support the merged Cisco DCNM product:

  • Cisco DCNM product documentation for Cisco DCNM Release 5.2 is retitled with the name Cisco DCNM for LAN.

  • Cisco Fabric Manager product documentation for Cisco DCNM Release 5.2 is retitled with the name Cisco DCNM for SAN.

  • Cisco DCNM for SAN product documentation is now published to the Data Center Network Manager listing page on

    This URL is also the listing page for Cisco DCNM for LAN product documentation.

  • Cisco Fabric Manager documentation for software releases earlier than Cisco DCNM Release 5.2, retains the name Cisco Fabric Manager and remains available at its current listing page:

    You should continue to use the Cisco Fabric Manager documentation if you are using a release of Cisco Fabric Manager software that is earlier than Cisco DCNM Release 5.2.

  • The name DCNM-SAN is used in place of Cisco DCNM for SAN in the user interface of Cisco Data Center Network Manager; likewise, the name DCNM-LAN is used in place of Cisco DCNM for LAN in the user interface. To match the user interface, the product documentation also uses the names DCNM-SAN and DCNM-LAN.

  • The following new publications support both Cisco DCNM for LAN and DCNM for SAN, and address the new licensing model, the new installation process, and the new look and feel of Cisco DCNM:

    • Cisco DCNM Installation and Licensing Guide

    • Cisco DCNM Release Notes

  • For a complete list of Cisco DCNM documentation, see the "Related Documentation" section in the Preface.

This section provides release-specific information for each new and changed feature in the Cisco Data Center Network Manager (DCNM) for Layer 2 switching.

New and Changed Information for Cisco DCNM

To check for additional information about Cisco DCNM releases, see the Cisco DCNM Release Notes.

This table summarizes the new and changed features for the Cisco DCNM Layer 2 switching.
Table 1 New and Changed Features



Changed in Release

Display enabled features

You can display which features are enabled on the device.


VLAN Trunking Protocol

You can run VTP in transparent mode.


Layer 2 consistency

The show forwarding consistency l2 command displays inconsistent entries on the MAC address table between the modules.


Display for MAC tables enhanced when vPC enabled.

The display for the show mac address-table command shows additional information when you have enabled and configured the vPC feature.


Static MAC addresses for Layer 3 interfaces

You can configure static MAC addresses for Layer 3 interfaces.


Link State Tracking (LST)

Assists with failover.


Chassis Internal Network (CIN)

Set up VLAN communication with third-party GUI.


IGMP snooping

Examines Layer 2 IP multicast traffic to discover ports where interested receivers reside.


FIP snooping

Layer 2 protocol that discovers end points and fabric associations for FCoE.


Private VLAN promiscuous trunk ports and secondary trunk ports

Promiscuous trunk ports carry traffic for multiple private VLANs.



Allows you to create Classical Ethernet or Fabric Path VLANs