Role of sub-interfaces
sendalot
Member Posts: 328
in CCNA & CCENT
What is the role of a sub-interface?
Say we are configuring OSPF on a router.
Then we have fa 0/0.1 or fa 0/0.2.
What are those for? Why can't we just use regular interfaces?
Thanks.
Say we are configuring OSPF on a router.
Then we have fa 0/0.1 or fa 0/0.2.
What are those for? Why can't we just use regular interfaces?
Thanks.
Comments
-
Node Man
Member Posts: 668 ■■■□□□□□□□
im new to this, i believe sub interfaces are for VLAN trunking. -
networker050184
Mod Posts: 11,962 Mod
Sub interfaces are to break a physical interface into multiple logical units. VLANs are one such use as Node Man pointed out.An expert is a man who has made all the mistakes which can be made. -
earweed
Member Posts: 5,192 ■■■■■■■■■□
If configuring router on a stick sub-interfaces are used. I hadn't heard of them or used them until configuring ROAS.No longer work in IT. Play around with stuff sometimes still and fix stuff for friends and relatives.