Layer 2 Switching Configuration Guide, Cisco DCNM for LAN, Release 5.x
Configuring VLANs
Downloads: This chapterpdf (PDF - 718.0KB) The complete bookPDF (PDF - 4.22MB) | Feedback

Configuring VLANs

Contents

Configuring VLANs

This chapter describes how to configure virtual LANs (VLANs) on Cisco NX-OS devices using Cisco Data Center Manager (DCNM) for LAN.

For more information about the Cisco DCNM features, see the .

This chapter includes the following sections:

Information About VLANs

You can use VLANs to divide the network into separate logical areas at the Layer 2 level. VLANs can also be considered as broadcast domains.

Any switch port can belong to a VLAN, and unicast broadcast and multicast packets are forwarded and flooded only to end stations in that VLAN. Each VLAN is considered a logical network, and packets destined for stations that do not belong to the VLAN must be forwarded through a router.

The Cisco NX-OS release that is running on a managed device many not support all the features or settings described in this chapter. For the latest feature information and caveats, see the documentation and release notes for your platform and software release.

VLANs Overview

A VLAN is a group of end stations in a switched network that is logically segmented by function or application, without regard to the physical locations of the users. VLANs have the same attributes as physical LANs, but you can group end stations even if they are not physically located on the same LAN segment.

Any switch port can belong to a VLAN, and unicast, broadcast, and multicast packets are forwarded and flooded only to end stations in that VLAN. Each VLAN is considered as a logical network, and packets destined for stations that do not belong to the VLAN must be forwarded through a router. The following figure shows VLANs as logical networks. The stations in the engineering department are assigned to one VLAN, the stations in the marketing department are assigned to another VLAN, and the stations in the accounting department are assigned to another VLAN.

Figure 1. VLANs as Logically Defined Networks

VLANs are usually associated with IP subnetworks. For example, all the end stations in a particular IP subnet belong to the same VLAN. To communicate between VLANs, you must route the traffic.

By default, a newly created VLAN is operational; that is, the newly created VLAN is in the no shutdown condition. Additionally, you can configure VLANs to be in the active state, which is passing traffic, or the suspended state, in which the VLANs are not passing packets. By default, the VLANs are in the active state and pass traffic.

A VLAN interface, or switched virtual interface (SVI), is a Layer 3 interface that is created to provide communication between VLANs. In order to route traffic between VLANs, you must create and configure a VLAN interface for each VLAN. Each VLAN requires only one VLAN interface.


Note


See the Interfaces Configuration Guide, Cisco DCNM for LAN, Release 5.x , for complete information on configuring VLAN network interfaces and subinterfaces, as well as assigning IP addresses. This feature must be enabled before you can configure VLAN network interfaces.


VLAN Ranges


Note


The extended system ID is always automatically enabled in Cisco NX-OS devices.


The device supports up to 4094 VLANs in accordance with the IEEE 802.1Q standard in each VDC. The software organizes these VLANs into ranges, and you use each range slightly differently.

This table describes the VLAN ranges.
Table 1 VLAN Ranges

VLANs Numbers

Range

Usage

1

Normal

Cisco default. You can use this VLAN, but you cannot modify or delete it.

2—1005

Normal

You can create, use, modify, and delete these VLANs.

1006—3967 and 4048—4093

Extended

You can create, name, and use these VLANs. You cannot change the following parameters:


  • The state is always active.

  • The VLAN is always enabled. You cannot shut down these VLANs.

3968-4047 and 4094

Internally allocated

These 80 VLANs and VLAN 4094 are allocated for internal device use. You cannot create, delete, or modify any VLANs within the block reserved for internal use.

The software allocates a group of VLAN numbers for features like multicast and diagnostics, that need to use internal VLANs for their operation. You cannot use, modify, or delete any of the VLANs in the reserved group. You can display the VLANs that are allocated internally and their associated use.

Creating, Deleting, and Modifying VLANs


Note


By default, all Cisco NX-OS ports are Layer 3 ports.


VLANs are numbered from 1 to 4094 for each VDC. All ports that you have configured as switch ports belong to the default VLAN when you first bring up the switch as a Layer 2 device. The default VLAN (VLAN1) uses only default values, and you cannot create, delete, or suspend activity in the default VLAN.

You create a VLAN by assigning a number to it; you can delete VLANs and move them from the active operational state to the suspended operational state. If you attempt to create a VLAN with an existing VLAN ID, the device goes into the VLAN submode but does not create the same VLAN again.

Newly created VLANs remain unused until Layer 2 ports are assigned to the specific VLAN. All the ports are assigned to VLAN1 by default.

Depending on the range of the VLAN, you can configure the following parameters for VLANs (except the default VLAN):


  • VLAN name

  • VLAN state

  • Shutdown or not shutdown


Note


See the Interfaces Configuration Guide, Cisco DCNM for LAN, Release 5.x, for information on configuring ports as VLAN access or trunk ports and assigning ports to VLANs.


When you delete a specified VLAN, the ports associated to that VLAN become inactive and no traffic flows. When you delete a specified VLAN from a trunk port, only that VLAN is shut down and traffic continues to flow on all the other VLANs through the trunk port.

However, the system retains all the VLAN-to-port mapping for that VLAN, and when you reenable or re-create, that specified VLAN, the system automatically reinstates all the original ports to that VLAN. The static MAC addresses and aging time for that VLAN are not restored when the VLAN is reenabled.

VTP

VTP is a Layer 2 messaging protocol that maintains VLAN consistency by managing the addition, deletion, and renaming of VLANs within a VTP domain. A VTP domain is made up of one or more network devices that share the same VTP domain name and that are connected with trunk interfaces. Each network device can be in only one VTP domain.

Layer 2 trunk interfaces, Layer 2 port channels, and virtual port channels (vPCs) support VTP functionality.

The VTP is disabled by default on the device. You can enable and configure VTP using the command-line interface (CLI). When VTP is disabled, the device does not relay any VTP protocol packets.


Note


Before Release 5.1(1), VTP worked only in transparent mode in the Cisco Nexus 7000 Series devices, allowing you to extend a VTP domain across the device.


When the device is in the VTP transparent mode, the device relays all VTP protocol packets that it receives on a trunk port to all other trunk ports. When you create or modify a VLAN that is in VTP transparent mode, those VLAN changes affect only the local device. A VTP transparent network device does not advertise its VLAN configuration and does not synchronize its VLAN configuration based on received advertisements.


Note


VLAN 1 is required on all trunk ports used for switch interconnects if VTP is supported in the network. Disabling VLAN 1 from any of these ports prevents VTP from functioning properly.


If you enable VTP, you must configure either version 1 or version 2. If you are using VTP in a Token Ring environment, you must use version 2.

High Availability for VLANs

The software supports high availability for both stateful and stateless restarts, as during a cold reboot, for VLANs. For the stateful restarts, the software supports a maximum of three retries. If you try more than 3 times within 10 seconds of a restart, the software reloads the supervisor module.

You can upgrade or downgrade the software seamlessly when you use VLANs.

Virtualization Support for VLANs

The software supports virtual device contexts (VDCs), and VLAN configuration and operation are local to the VDC.


Note


See the Virtual Device Context Configuration Guide, Cisco DCNM for LAN, Release 5.x for complete information on VDCs and assigning resources.


When you create a new VDC, the device automatically creates a new default VLAN, VLAN1, and internally reserves VLANs for device use.

One or more VLANs can be associated with a role to either allow or disallow the user to configure it. When a VLAN is associated with a role, the corresponding interfaces will also be subjected to the same check. For instance, if a role is allowed to access VLAN1, then that role also has access to the interfaces that have that VLAN. If an interface does not have the VLAN associated with a role, that interface is not accessible to that role.

Licensing Requirements for VLANs

The following table shows the licensing requirements for this feature.

Product

License Requirement

Cisco DCNM

VLANs require no license. Any feature not included in a license package is bundled with the Cisco DCNM and is provided at no charge to you.

Cisco NX-OS

VLANs require no license. Any feature not included in a license package is bundled with the Cisco NX-OS system images and is provided at no extra charge to you. For a complete explanation of the Cisco NX-OS licensing scheme, see the Cisco NX-OS Licensing Guide.

However, using VDCs requires an Advanced Services license.

Prerequisites for Configuring VLANs

VLANs have the following prerequisites:


  • You must be logged onto the device.

  • You must create the VLAN before you can do any modification of that VLAN.

Guidelines and Limitations for Configuring VLANs

VLANs have the following configuration guidelines and limitations:


  • The maximum number of VLANs per VDC is 4094.

  • You cannot create, modify, or delete any VLANs that are within the group of VLANs reserved for internal use.

  • VLAN1 is the default VLAN. You cannot create, modify, or delete this VLAN.

  • VLANs 1006 to 4094 are always in the active state and are always enabled. You cannot suspend the state or shut down these VLANs.

Platform Support for VLANs

The following platforms support this feature but may implement it differently. For platform-specific information, including guidelines and limitations, system defaults, and configuration limits, see the corresponding documentation

Platform

Documentation

Cisco Nexus 1000 Series Switches

Cisco Nexus 1000 Series Switch Documentation

Cisco Nexus 3000 Series Switches

Cisco Nexus 3000 Series Switch Documentation

Cisco Nexus 4000 Series switches

Cisco Nexus 4000 Series switch documentation

Cisco Nexus 5000 Series Switches

Cisco Nexus 5000 Series Switch Documentation

Cisco Nexus 7000 Series Switches

Cisco Nexus 7000 Series Switch Documentation

Catalyst 6500 Series Switches

Catalyst 6500 Series Switch Documentation

Configuring a VLAN


Note


See the , for information on using the Topology feature with VLANs.



Note


See the Interfaces Configuration Guide, Cisco DCNM for LAN, Release 5.x, for information on assigning Layer 2 interfaces to VLANs (access or trunk ports). All interfaces are in VLAN 1 by default.


Creating and Deleting a VLAN

You can create or delete all VLANs except the default VLAN and those VLANs that are internally allocated for use by the device.

Once a VLAN is created, it is automatically in the active state.


Note


When you delete a VLAN, ports associated to that VLAN shut down. Therefore, no traffic flows and the packets are dropped. On trunk ports, the port remains open and the traffic from all other VLANs except the deleted VLAN continues to flow.


If you create a range of VLANs and some of these VLANs cannot be created, the software returns a message listing the failed VLANs, and all the other VLANs in the specified range are created.

This figure shows the VLAN pane that you use to create VLANs.
Figure 2. Configuring VLAN Details

Procedure
Step 1   From the Feature Selector pane, choose Switching > VLAN to open the VLAN pane.
Step 2   In the Summary pane, click the Device View tab.
Step 3   In the Summary pane, click the device in which you want to create a VLAN.
Step 4   On the toolbar, click New.
Step 5   From the drop-down list, choose Normal VLAN.
Step 6   In the VLAN ID column, enter the ID for the new VLAN.

The VLAN is immediately created on the device with default settings.

Step 7   (Optional)To change the name of the VLAN, double-click in the Name column and enter the name that you want.
Step 8   (Optional) From the menu bar, choose Actions > Delete after you have chosen the VLAN in the Summary pane that you want to delete.

The system displays a message asking if you want to delete these VLANs. When you click Yes, those VLANs are immediately removed from the device.

Step 9   (Optional) From the menu bar, choose File > Deploy to apply your changes to the device.

Configuring or Modifying the Basic Settings for a VLAN

You can use the VLAN pane to modify the basic VLAN settings (see Figure 1).

Procedure
Step 1   From the Feature Selector pane, choose Switching > VLAN to open the VLAN pane.
Step 2   In the Summary pane, click the Device View tab.
Step 3   Click the device that you want to configure.

The system highlights the device in the Summary pane, and tabs appear in the Details pane.

Step 4   Expand the view for the device.

The system lists the VLANs configured on that device.

Step 5   Highlight the VLAN that you want to configure.
Step 6   In the Details pane, click the VLAN Details tab.
Step 7   Click the VLAN Settings tab.
Note   

Do not change the dimmed value in the Media row from Ethernet. Ethernet is the only supported media.

Step 8   Enter the name in the VLAN Name field.
Step 9   Choose the type of VLAN that you want and the administrative state and status from the drop-down lists.
Step 10   (Optional) Beginning with Cisco NX-OS Release 4.2(3), if you want to enable this VLAN for the Chassis Internal Network (CIN), check the Enable VLAN CIN checkbox. 
Note   

See the Cisco Nexus 4001 Switch Module Configuration Guide for information on CIN.

Step 11   (Optional) From the menu bar, choose File > Deploy  to apply your changes to the device.

Copying the VLAN from One Device to Another

You can copy and paste the VLAN, along with its VLAN ID, name, type, admin stat, and admin status, from one device to another.

Procedure
Step 1   From the Feature Selector pane, choose Switching > VLAN to open the VLAN pane.
Step 2   In the Summary pane, click the Device View tab.
Step 3   Click the device from which you want to copy the VLAN.
Step 4   Expand the view for the device.

The system lists the VLANs configured on that device.

Step 5   Highlight the VLAN that you want to copy.
Step 6   From the menu bar, choose Actions > Copy.
Step 7   In the Summary pane, click the device to which you want to paste the VLAN.
Step 8   From the menu bar, choose Actions > Paste.
Step 9   (Optional) From the menu bar, choose File > Deploy  to apply your changes to the device.

Changing the VLAN Mode

Beginning with Cisco Release 5.2(1), Cisco Nexus 7000 Series devices support the FabricPath mode for VLANs. See the Cisco DCNM FabricPath Configuration Guide, Release 5.x for information about configuring FabricPath.


Note


Ensure that the FabricPath is enabled on your device.
Procedure
Step 1   From the Feature Selector pane, choose Switching > VLAN to open the VLAN pane.
Step 2   In the Summary pane, click the Device View tab.
Step 3   Click the device where you want to change the mode of a VLAN.
Step 4   Expand the view for the device.

The system lists the VLANs configured on that device.

Step 5   Highlight the VLAN where you want to change the mode.
Step 6   In the Details pane, click VLAN Details.
Step 7   Expand VLAN Settings.
Step 8   Under Basic Settings, in the Mode drop-down list, change the mode as required.
Step 9   (Optional) From the menu bar, choose File > Deploy  to apply your changes to the device.

Displaying VLAN Statistics


  • VLAN Traffic Statistics—Displays information on VLAN traffic such as Layer 2 unicast, multicast, and broadcast traffic, Layer 3 unicast and multicast traffic, and so forth.

Field Descriptions for Configuring VLANs

This section includes device view and network view tables.

Device View: Device Global Settings: Global Settings Section

Table 2  Device View: Device: Global Settings: Global Settings Section

Field

Description

Dot1Q Native Tag

Tagging of the packets on the native VLAN maintained on all trunk ports on the device. The default is disabled.

Device View: VLAN: VLAN Details: VLAN Settings Section

Table 3  Device View: VLAN: VLAN Details: VLAN Settings: Normal VLANs

Field

Description

VLAN ID

Display only. VLAN ID. The default is the VLAN plus the number of the VLAN (VLANXXXX).

Device

Display only. Hostname or IP address for the device for this VLAN.

VLAN Name

Name of the VLAN. The default name is the VLAN plus the number of the VLAN (VLANXXXX).

VLAN Type

VLAN type set as normal. Valid values are as follows:


  • Normal

  • Primary

  • Community

  • Isolated

Media

This field is not supported.

Admin State

Administrative state. Valid values are as follows:


  • Active

  • Suspended

The default is Active.

Admin Status

Administrative status. Valid values are as follows:


  • Enabled

  • Disabled

The default is Enabled.

VLAN Network Interface Settings

Description

Description of the VLAN network interface. The value is any printable string.

IP Address

IP address for the VLAN network interface. The value is a valid IP address in dotted decimal notation (A:B:C:D).

Netmask

Network mask for the VLAN network interface. The value is in dotted decimal notation.

Admin Status

Administrative state of the VLAN network interface. Valid values are as follows:


The default is Up.

Oper Status

Display only. Operational status of this VLAN network interface.

Table 4  Device View: VLAN: VLAN Details: VLAN Settings: Primary VLANs

Field

Description

VLAN ID

Display only. VLAN ID. The default is the VLAN plus the number of the VLAN (VLANXXXX).

Device

Display only. Hostname or IP address for the device for this VLAN.

VLAN Name

Name of the VLAN. The default name is the VLAN plus the number of the VLAN (VLANXXXX).

VLAN Type

VLAN type set as a primary VLAN. The primary VLAN carries downstream traffic from the router to the private VLAN host ports. Valid values are as follows:


  • Normal

  • Primary

  • Community

  • Isolated

Media

This field is not supported.

Admin State

Administrative state. Valid values are as follows:


  • Active

  • Suspended

The default is Active.

Admin Status

Administrative status. Valid values are as follows:


  • Enabled

  • Disabled

The default is Enabled.

Oper Status

Display only. Operational status of this VLAN.

Secondary VLANs

Note   

Multiple secondary VLANs can be associated with each primary VLAN.

VLAN ID

Display only. Isolated and community VLANs configured on the device.

Type

Display only. Type of the secondary VLAN. Valid values are as follows:


  • Community

  • Isolated

VLAN Network Interface Settings

Description

Description of the VLAN network interface. The value is any printable string

IP Address

IP address for the VLAN network interface. The value is a valid IP address in dotted decimal notation (A:B:C:D).

Netmask

Network mask for the VLAN network interface. The value is in dotted decimal notation.

Admin State

Administrative state of the VLAN network interface. Valid values are as follows:


The default is Up.

Table 5  Device View: VLAN: VLAN Details: VLAN Settings: Community VLANs

Field

Description

VLAN ID

Display only. VLAN ID. The default is the VLAN plus the number of the VLAN (VLANXXXX).

Device

Display only. Hostname or IP address for the device for this VLAN.

VLAN Name

Name of the VLAN. The default name is the VLAN plus the number of the VLAN (VLANXXXX).

VLAN Type

VLAN set as a community VLAN. Valid values are as follows:


  • Normal

  • Primary

  • Community

  • Isolated

Primary VLAN ID

Display only. Displays the primary VLAN with which this community VLAN is associated.

Note   

If you have not associated a primary VLAN, the system displays "Not Configured."

Mode

VLAN mode. Valid values are as follows:


  • CE

  • FabricPath

The default mode is CE.

Media

This field is not supported.

Admin State

Valid values are as follows:


  • Active

  • Suspended

The default is Active.

Admin Status

Valid values are as follows:


  • Enabled

  • Disabled

The default is Enabled.

VLAN Network Interface Settings

Note   

When a community VLAN is associated with a primary VLAN, this VLAN network interface is not supported. With private VLANs, only the VLAN network interface on the primary VLAN is operational.

Description

Description of the VLAN network interface. The value is any printable string.

IP Address

IP address for the VLAN network interface. The value is a valid IP address in dotted decimal notation (A:B:C:D).

Netmask

Network mask for the VLAN network interface. The value is in dotted decimal notation.

Admin State

Administrative state of the VLAN network interface. Valid values are as follows:


The default is Up.

Oper Status

Display only. Operational status of this VLAN network interface.

Table 6  Device View: VLAN: VLAN Details: VLAN Settings: Isolated VLANs

Field

Description

VLAN ID

Display only. VLAN ID. The default is the VLAN plus the number of the VLAN (VLANXXXX).

Device

Display only. Hostname or IP address for the device for this VLAN.

VLAN Name

Name of the VLAN. The maximum number of characters is XXX. The default name is VLAN plus the numerical value of the VLAN: VLANXXXX.

VLAN Type

VLAN type set as an isolated VLAN. Valid values are as follows:


  • Normal

  • Primary

  • Community

  • Isolated

Primary VLAN ID

Display only. Displays the primary VLAN with which this community VLAN is associated.

Note   

If you have not associated a primary VLAN, the system displays "Not Configured."

Media

This field is not supported.

Admin State

Administrative state. Valid values are as follows:


  • Active

  • Suspended

The default is Active.

Admin Status

Administrative status. Valid values are as follows:


  • Enabled

  • Disabled

The default is Enabled.

Oper Status

Operational status of this VLAN.

VLAN Network Interface Settings

Note   

When an isolated VLAN is associated with a primary VLAN, this VLAN network interface is not supported. With private VLANs, only the VLAN network interface on the primary VLAN is operational.

Description

Description of the VLAN network interface. The value is any printable string

IP Address

IP address for the VLAN network interface. The value is a valid IP address in dotted decimal notation (A:B:C:D).

Netmask

Network mask for the VLAN network interface. The value is in dotted decimal notation.

Admin State

Administrative state of the VLAN network interface. Valid values are as follows:


The default is Up.

Device View: VLAN: VLAN Details: Advanced Settings Section

Table 7  Device View: VLAN: VLAN Details: Advanced Settings Section

Field

Description

SPAN Settings

RSPAN VLAN

Status of whether there is a remote SPAN (RSPAN) VLAN or not.

SPAN Source Settings

Session ID

Display only. SPAN session ID where the interface is applied.

Type

Display only. Session type.

Direction: Ingress

Monitor ingress packets.

Direction: Egress

Monitor egress packets.

Security Settings

DAI

Display only. Whether Dynamic ARP Inspection (DAI) is enabled or disabled.

DHCP Snooping

Display only. Whether DHCP snooping is enabled or disabled.

VACL

VLAN access map that filters ingress traffic on the VLAN.

Device View: VLAN: VLAN Ports for Normal VLANs: Access Ports Section

Table 8  Device View: VLAN: VLAN Ports for Normal VLANs: Access Ports Section

Field

Description

Interface Name

Display only. Name of the access interfaces. This interface can be a physical port or a port channel.

Description

Display only. Description configured for the interface. The default is blank.

Port Status

Display only. Status of the port. Valid values are as follows:


  • Admin Down

  • Up

  • Down

Device View: VLAN: VLAN Ports for Normal VLANs: Trunk Ports Section

Table 9  Device View: VLAN: VLAN Ports for Normal VLANs: Trunk Ports Section

Field

Description

Interface Name

Display only. Name of the trunk interfaces. This can be a physical port or a port channel.

Description

Display only. Description configured for the interface. The default is blank.

Port Status

Display only. Status of the port. Valid values are as follows:


  • Admin Down

  • Up

  • Down

Device View: VLAN: Primary VLAN Ports for Primary VLANs: Promiscuous Ports Section

Table 10  Device View: VLAN: VLAN Ports for Primary VLANs: Promiscuous Ports Section

Field

Description

Interface Name

Display only. Name of the interfaces. This interface can be a physical port or a port channel.

Description

Display only. Description configured for the interface. The default is blank.

Secondary VLANs

Secondary VLANs that are associated to this promiscuous port for the primary VLAN.

Port Mode

Display only. Mode of the port. Valid values are as follows:


  • PVLAN Promiscuous

  • PVLAN Trunk Promiscuous

Port Status

Display only. Status of the port. Valid values are as follows:


  • Admin Down

  • Up

  • Down

Device View: VLAN: Secondary VLAN Ports Tab for Secondary VLANs: PVLAN Host Ports Section

Table 11  Device View: VLAN: VLAN Ports for Secondary VLANs: PVLAN Hosts Ports Section

Field

Description

Interface Name

Display only. Name of the interfaces. This interface can be a physical port or a port channel.

Description

Display only. Description configured for the interface. The default is blank.

Port Mode

Display only. Mode of the port. Valid values are as follows:


  • PVLAN Host

  • PVLAN Trunk Secondary

Port Status

Secondary VLAN to which port is associated.

Display only. Status of the port. Valid values are as follows:


  • Admin Down

  • Up

  • Down

Network View: Device: VLAN Details: VLAN Settings Section

Table 12  Network View: Device: VLAN Details: VLAN Settings: Normal VLANs

Field

Description

VLAN ID

Display only. VLAN ID. The default is the VLAN plus the number of the VLAN (VLANXXXX).

Device

Display only. Hostname or IP address for the device for this VLAN.

VLAN Name

Name of the VLAN. The maximum number of characters is XXX. The default name is VLAN plus the numerical value of the VLAN: VLANXXXX.

VLAN Type

VLAN type set as a normal VLAN. Valid values are as follows:


  • Normal

  • Primary

  • Community

  • Isolated

Media

This field is not supported.

Admin State

Administrative state. Valid values are as follows:


  • Active

  • Suspended

The default is Active.

Admin Status

Administrative status. Valid values are as follows:


  • Enabled

  • Disabled

The default is Enabled.

VLAN Network Interface Settings

Description

Description of the VLAN network interface. The value is any printable string.

IP Address

IP address for the VLAN network interface. The value is a valid IP address in dotted decimal notation (A:B:C:D).

Netmask

Network mask for the VLAN network interface. The value is in dotted decimal notation.

Admin State

Administrative state of the VLAN network interface. Valid values are as follows:


The default is Up.

Oper Status

Display only. Operational status of this VLAN network interface.

Network View: Device: VLAN Details: Advanced Settings Section

Table 13  Network View: Device: VLAN Details: Advanced Settings Section

Field

Description

SPAN Settings

RSPAN VLAN

Status of whether there is a remote SPAN (RSPAN) VLAN or not.

SPAN Source Settings

Session ID

Display only. SPAN session ID where the interface is applied.

Type

Display only. Session type.

Direction: Ingress

Monitor ingress packets.

Direction: Egress

Monitor egress packets.

Security Settings

DAI

Display only. Status of whether Dynamic ARP Inspection (DAI) is enabled or disabled.

DHCP Snooping

Display only. Status of whether DHCP snooping is enabled or disabled.

VACL

VLAN access map that filters ingress traffic on the VLAN.

Network View: Device: VLAN Ports: Access Ports Section

Table 14  Network View: Device: VLAN Ports for Normal VLANs: Access Ports Section

Field

Description

Interface Name

Display only. Name of the access interfaces. This interface can be a physical port or a port channel.

Description

Display only. Description configured for the interface. The default is blank.

Port Status

Display only. Status of the port. Valid values are as follows:


  • Admin Down

  • Up

  • Down

Network View: Device: VLAN Ports: Trunk Ports Section

Table 15  Network View: VLAN: VLAN Ports for Normal VLANs: Trunk Ports Section

Field

Description

Interface Name

Display only. Name of the trunk interfaces. This interface can be a physical port or a port channel.

Description

Display only. Description configured for the interface. The default is blank.

Port Status

Display only. Status of the port. Valid values are as follows:


  • Admin Down

  • Up

  • Down

Network View: Device: Primary VLAN Ports: Promiscuous Ports Section

Table 16  Network View: Device: Primary VLAN Ports: Promiscuous Ports Section

Field

Description

Interface Name

Display only. Name of the interfaces. This interface can be a physical port or a port channel.

Description

Display only. Description configured for the interface. The default is blank.

Secondary VLANs

Secondary VLANs that are associated to this promiscuous port for the primary VLAN.

Port Status

Display only. Status of the port. Valid values are as follows:


  • Admin Down

  • Up

  • Down

Network View: Device: Secondary VLAN Ports: PVLAN Host Ports Section

Table 17  Network View: Device: Secondary VLAN Ports: PVLAN Host Ports Section

Field

Description

Interface Name

Display only. Name of the interfaces. This interface can be a physical port or a port channel.

Description

Display only. Description configured for the interface. The default is blank.

Port Status

Secondary VLAN to which the port is associated.

Display only. Status of the port. Valid values are as follows:


  • Admin Down

  • Up

  • Down

Additional References for VLANs

Related Documents

Related Topic

Document Title

Interfaces, VLAN network interfaces, IP addressing and port channels

Interfaces Configuration Guide, Cisco DCNM for LAN, Release 5.x

DCNM fundamentals

VDCs

Virtual Device Context Configuration Guide, Cisco DCNM for LAN, Release 5.x

Release notes

Cisco DCNM Release Notes, Release 5.x

Standards

Standards

Title

No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.

MIBs

MIBs

MIBs Link


  • CISCO-VLAN-MEMBERSHIP MIB:

    vmMembershipTable-MIB

    vmMembershipSummaryTable-MIB

To locate and download MIBs, go to the following URL:

http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml

Feature History for Configuring VLANs - DCNM

This table lists the release history for this feature.
Table 18 Feature History for Configuring VLANs

Feature Name

Releases

Feature Information

VLANs

4.1(2)

Ability to copy and paste VLANs from one device to another.

VLAN mode

5.2(1)

Ability to create Classical Ethernet or FabricPath VLANs.