OT: Cat 6500 IOS (not CatOS)

From: Joe A (groupstudy@comcast.net)
Date: Fri Nov 15 2002 - 15:26:35 GMT-3

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Guys,
 
When running IOS on the Catalyst 6500, what is the difference between
the following:
 
First, put a bunch of interfaces (ports) into VLAN 20, including port
3/1, then configuring:
 
interface FastEthernet 3/1
 ip address 10.1.1.1 255.255.255.0

OR

First, put a bunch of interfaces (ports) into VLAN 20 and then assign
the IP address
to a logical VLAN interface itself:
 
interface VLAN 20
 ip address 10.1.1.1 255.255.255.0
 
Do these accomplish the same thing?
 
Another question, what makes an interface a 'layer 3' interface, just
the presence of a layer 3 address, or is there more to it?
 
Joe

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