Configuring Logical Interfaces

You can define one or more logical interfaces for managing the Cisco Provider Connectivity Assurance Sensor Control (formerly Skylight sensor: control) instance; the types of interfaces available include standard IPv4, IPv6, VLAN or VLAN-in- VLAN interfaces. Once the interface is defined, you can also define a route to access the Sensor Control from outside its management subnet.

The following types of logical interface are available:

• Standard: This interface type is associated with a single port. You could use a standard interface to manage the Sensor Control from a single untagged port.
• VLAN: Like standard interfaces, this interface type is also associated with a single port. One use of a VLAN interface would be if you wanted to separate the management traffic from the client traffic. In this example, you would create a VLAN for the management and another VLAN for the customer traffic.

• VLAN-in-VLAN (.1q in .1q): This interface type is also associated with a single port. You can use this interface type when you want to use sub-VLAN. With a VLAN-in-VLAN interface, you can assign priority, as well as choose the Ethertype and VLAN.

By default, the following logical interface is defined:

• Management: The default interface (Standard type) that enables access to the Management Web Interface and CLI via the management port

You can configure interfaces for dual homing by specifying a second IP address (an IP address alias). When specifying an alias, only the address, network mask and gateway parameters can be defined. An alias interface is always set up as a static IP address (DHCP cannot be used).

▶ To view a logical interface

1. Access the page System ▶ Configuration ▶ Interface.
   A listing of all logical interfaces associated with this instance of the Sensor Control is displayed.

2. (Optional) To limit the view to only certain interfaces, enter a value on which to filter, then click Search. You can filter by the interface name, interface state, IP address, netmask, the info field value, ACL, the device name or whether or not DHCP has been enabled.

System ▶ Configuration ▶ Interface

For information on specific parameters, refer to the table Interface Settings (System ▶ Configuration ▶ Interface).

Adding or Editing a Logical Interface

After a factory default reset, a logical interface named Management is bound to a port. You can add and edit more logical interfaces to provide the Sensor Control with multiple management options.

▶ To add or edit a logical interface

1. Access the page System ▶ Configuration ▶ Interface.

2. Click Add to create a new interface or click the Interface Name of an existing interface to edit its settings.
   

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   Note: You cannot modify a remote interface’s IP settings when adding a new interface.

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3. Complete the required fields, then click Apply.
   

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   Notes:
   The fields displayed will vary, depending on the Interface type you select.

   You can set the IP address for an interface to 0.0.0.0 when the interface is not required to be an IP interface, such as when the interface is used for loopback or test set interaction.

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For more information on specific parameters, refer to the following table.

Interface Settings (System ▶ Configuration ▶ Interface)

All Interface Types

IPv4

IPv6

VLAN Settings (VLAN and VLANinVLAN Interface Types Only)

ACL Settings (Local Interfaces Only)

Adding or Editing an IPv4 Route

You can define an IPv4 route that is outside the subnet defined by each interface (that is bound locally to a Sensor Control instance) in order to access a remote device that is outside of the management station’s subnet.

Access the page System ▶ Configuration ▶ Interface to view the existing, active IPv4 routes and update their settings.

▶To add or edit an IPv4 route

1. Access the page System ▶ Configuration ▶ Interface.

2. In the IPv4 Routes section of the screen, click the Add button to add a new route or click the route Name to edit an existing route.

3. Complete the required fields, then click Apply.
   

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   Note: A route can also be added to a remote device by selecting a remote interface in the IPv4 Interfaces section of the screen.

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For more information on specific parameters, refer to the following table.

IPv4 Route (System ▶ Configuration ▶ Interface)

Adding or Editing an IPv6 Route

You can define an IPv6 route that is outside the subnet defined by each interface (that is bound locally to a Sensor Control instance) in order to access a remote device that is outside of the management station’s subnet.

Access the page System ▶ Configuration ▶ Interface to view the existing, active IPv6 routes and update their settings.

▶ To add or edit an IPv6 route

1. Access the page System ▶ Configuration ▶ Interface.

2. In the IPv6 Routes section of the screen, click the Add button to add a new route or click the route Name to edit an existing route.

3. Complete the required fields, then click Apply.
   

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   Note: A route can also be added to a remote device by selecting a remote interface in the IPv6 Interfaces section of the screen.

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For more information on specific parameters, refer to the following table.

IPv6 Route (System ▶ Configuration ▶ Interface)