I am working at a client site today and am configuring some new 3850 switches that they have purchased.
I am currently configuring a 48 port switch, which to no surprise, has 48 physical RJ45 ports on the front of the switch.
On CLI, I see these ports as G1/0/1 thru G1/0/48.
Here's the twist... there is also a G0/0 interface! Here is what it looks like natively:
LOUSERSWT#sho run int G0/0
Current configuration : 94 bytes
vrf forwarding Mgmt-vrf
no ip address
I was curious as to what spefically this interface is used for?
Thanks in advance..
This is an out of band management port.
As far as I am aware, it has no concept of Vlans or routing.
You just give it an IP address and it acts like a host so you can manage the switch out of band.
To be honest, I have rarely seen it used.
This is the management port meant only to manage the switch. For details see below