Subnetting Practices

[Iljitsch van Beijnum]

On 16-jul-2007, at 17:56, Roland Dobbins wrote:

> OK.  My concerns are that using overly large subnets on p2p links  
> a) is wasteful

See my previous message...

> and b) could be a DoS vector, especially on software-based routers.

You mean like an ARP storm?

Obviously people are going to use /64 subnets in IPv4 for non-p2p  
subnets, and alhough those will have more addresses used, they'll  
still be populated extremely sparsely, so IPv6 routers need to be  
able to handle this kind of abuse anyway, so what it is you're using  
on a p2p subnet shouldn't matter.

(And I doubt anyone is implementing neighbor discover in hardware...)