Summary
Subinterfaces are virtual interfaces created by dividing one physical interface into multiple logical interfaces. They are used for a variety of purposes, such as assigning a different IP address to each subinterface and creating multiple broadcast domains on a single physical interface.
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To configure a subinterface, an interface number and a tag need to be assigned, with the tag matching the VLAN exactly.
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The interface should then be added to the 'default' Virtual Router and assigned to the 'trust' Security Zone.
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Summary
In the subinterface configuration, we need to assign an interface number and a tag. The tag needs to match the VLAN exactly, but the interface number may be different. For ease of management, it's best to set it the same id as the VLAN tag. Add the interface to the 'default' Virtual Router and assign it to the 'trust' Security Zone.
Getting Started: Layer 3 Subinterfaces - Palo Alto Networks
paloaltonetworks.com
The ip address interface-specific configuration command is used to assign an IP address to a subinterface. Here is the ip address command syntax: ip address <IP-address> <subnet-mask> The parameter options…
Voice, IP, and ATM MPLS Features - Cisco Press
ciscopress.com
Select a Parent Interface and Create a Sub-Interface with a VLAN ID, click MANAGE , navigate to Network | Interfaces. In the Select Interface drop-down option, select Virtual Interface, you…
How can I configure Sub-Interfaces? | SonicWall
sonicwall.com
