secondary IP addresses on router interfaces

So i am reading the Lammle book again and I really am skimming the stuff..... its really basic info so far that I am solid on. I see something about secondary interfaces.

He says to use secondary IP addresses is bad design. Why would he say that?

I use secondary IP addresses on our edge routers a lot to deal with the multiple subnet blocks that we run for the subscribers on the inside, as well as the HSRP that is configured. I suspect that he is making this statement as a broad "Not proper form" for the majority of corporate users, and not those who are in the service provider arena?

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Comments

Netstudent

I think it is because secondary interfaces do not suppress any broadcasts on the switch ports. To add broadcast scalability, you want to think about subinterfaces with dot1q encap. and vlans to segment your subnets. I have used secondary interfaces in smaller networks with no problems. I wouldn't necesarily call it bad design.