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Software Secure Firewall Threat Defense
Platform Secure Firewall Threat Defense Virtual
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Configuring FDM-Managed Devices Interfaces Configuring Firepower Interfaces Add a Subinterface to an EtherChannel Interface Add a Subinterface to an EtherChannel Interface

Last updated: Jun 09, 2025

Add a Subinterface to an EtherChannel Interface

Use the following procedure to add a subinterface to an existing interface:

Procedure

1

In the navigation pane, click Security Devices.

2

Click the Devices tab.

3

Click the FTD tab and select the threat defense you want to add an EtherChannel to. In the Management pane located to the right, select Interfaces.

4

Select the interface you want to group the subinterface under. Click the + icon and select Subinterface.
5

Enter a Logical Name.

6

(Optional) Enter a description.
7

(Optional) Assign a security zone to the subinterface. Note that you cannot assign a security zone if the subinterface does not have a logical name.
8

Enter a VLAN ID.

9

Enter the EtherChannel ID. Use a value between 1 and 48; use values between 1 and 8 for the Firepower 1010 series.
10

Select the IPv4, IPv6, or Advanced tab to configure the IP address of the subinterface.
11

Click Save.

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