Configuring several subnets on a single IP

Question

Is it possible (and correct) to configure one single IP with several subnets?

For example:

ip               subnet
172.30.176.17    172.30.176.0/23
172.30.176.17    172.30.176.0/24

Is this a valid and sound configuration?

Is it possible? Yes, on Linux with multiple route tables, it might even be useful. Is it 'correct'. Almost never. — Zoredache, Sep 10 '13 at 16:27

score 3 · Answer 1 · answered Sep 10 '13 at 12:18

3

Sure, it's technically possible in some implementations, but there's really no good reason to do it.

answered Sep 10 '13 at 12:18

MDMarra

score 0 · Answer 2 · answered Sep 10 '13 at 12:22

0

Why not? You can configure multiple networks with one IP, but don't forget about route metrics (smaller network have better metric)

answered Sep 10 '13 at 12:22

Paul Rudnitskiy

2 Answers2