router configs/OSPF - interfaces or entire networks?

From: Jeffrey Levine (jeffrey_levine@xxxxxxxxxxx)
Date: Wed Aug 15 2001 - 14:11:25 GMT-3

   
I have noticed in some lab scenarios that when the instructions say that a
router interface should be advertised in a routing protocol, the labs
sometimes advertise only the interface, othertimes an entire subnet.

For example, let's say it's an ethernet interface with address
192.168.1.1/24 being advertised under OSPF. I've seen the following:

router ospf 64
net 192.168.1.1 0.0.0.0 area 0

or

router ospf 64
net 192.168.1.1 0.0.0.255 area 0

I wouldn't be concerned if there were some consistency. I've seen the lab
instructions state "interface" and then seen the entire network advertised
and vice-versa.

Any thought?

Jeffrey S. Levine

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