Modifying Interfaces for L3Out Using the GUI
This procedure modifies an L3Out interface.
Before you begin
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The Cisco ACI fabric is installed, the Cisco APICs are online, and the Cisco APIC cluster is formed and healthy.
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A Cisco APIC fabric administrator account is available that enables creating the necessary fabric infrastructure configurations.
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The target leaf switches are registered in the Cisco ACI fabric and available.
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Port channels are configured when port channels are used for L3Out interfaces.
Procedure
Step 1 |
On the menu bar, choose . |
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Step 2 |
In the Work pane, double click the tenant's name. |
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Step 3 |
In the Navigation pane, expand . |
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Step 4 |
In the Navigation pane, choose the Logical Interface Profile that you want to modify. |
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Step 5 |
Choose the interface type tab from Routed Sub-Interfaces, Routed Interfaces, SVI, or Floating SVI. |
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Step 6 |
Double click the existing interface to modify it, or click the Create (+) button to add a new interface to the Logical Interface Profile. |
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Step 7 |
To add a new interface in the Path Type field, choose the appropriate path type. If Routed Sub-Interface or Routed Interface, choose Path Type as a port or Direct Port Channel. If this is for SVI, choose Path Type from Port, Direct Port Channel, or Virtual Port Channel (vPC).
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Step 8 |
In the Node field, choose a node.
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Step 9 |
In the Path field, choose the interface ID or the port-channel name from the drop-down list. An example of an interface ID is eth 1/1. The port-channel name is the interface policy group name for each direct or virtual port-channel. |
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Step 10 |
In the Description field, enter a description of the L3Out interface. |
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Step 11 |
For Routed Sub-Interfaces or SVI, in the Encap field, choose VLAN from the drop-down menu, and enter an integer value for this entry. |
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Step 12 |
For Routed Sub-Interfaces or SVI, in the Mode field, choose the VLAN tagging mode. |
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Step 13 |
In the IPv4 Primary / IPv6 Preferred Address field, enter the primary IP addresses of the path attached to the Layer 3 outside profile. |
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Step 14 |
If an IPv6 address is used, in the IPv6 DAD field, select disabled or enabled. For more information about this field, see the section "Configuring IPv6 Neighbor Discovery Duplicate Address Detection" in the chapter "IPv6 Neighbor Discovery". |
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Step 15 |
In the Link-local Address field, enter an IPv6 link-local address. This is the override of the system-generated IPv6 link-local address. |
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Step 16 |
In the IPv4 Secondary / IPv6 Additional Addresses field, enter the secondary IP addresses of the path attached to the Layer 3 outside profile. |
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Step 17 |
Check the ND RA Prefix box if you wish to enable a Neighbor Discovery Router Advertisement prefix for the interface. The ND RA Prefix Policy option appears. When this is enabled, the routed interface is available for autoconfiguration and the prefix is sent to the host for autoconfiguration. While ND RA Interface policies are deployed under bridge domains or Layer 3 Outs, ND prefix policies are deployed for individual subnets. The ND prefix policy is on a subnet level. The ND RA Prefix applies only to IPv6 addresses. |
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Step 18 |
If you checked the ND RA Prefix box, select the ND RA Prefix policy that you want to use. You can select the default policy or you can choose to create your own ND RA prefix policy. If you choose to create your own policy, the Create ND RA Prefix Policy screen appears:
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Step 19 |
In the MAC Address field, enter the MAC address of the path attached to the Layer 3 outside profile. |
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Step 20 |
In the MTU (bytes) field, set the maximum transmit unit of the external network. The range is 576 to 9216. To inherit the value, enter inherit in the field. |
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Step 21 |
In the Target DSCP field, select the target differentiated services code point (DSCP) of the path attached to the Layer 3 outside profile from the drop-down list. |
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Step 22 |
Click Submit. |