NIST IPv6 document

Jack Bates jbates at
Thu Jan 6 14:43:39 CST 2011

On 1/6/2011 2:17 PM, TJ wrote:

> Again, off the top of my head, maybe - when under duress - age out the
> incomplete ND table entries faster.

Given that the incomplete age is to protect the L2 network from 
excessive broadcast/multicast, I agree that aging them out fast would be 
a wiser solution, if you must have it to begin with. It is better to 
increase traffic loads.

I'm still a proponent for removing as needed requests like this, though. 
It would have been better to send a global "everyone update me" request 
periodically, even if triggered by an unknown entry, yet limited to only 
broadcasting once every 10-30 seconds.

Given that all requests for an unknown arp/ND entry results in all hosts 
on the network checking, it only makes sense for all hosts to respond. 
There may be other concerns, but I'm actually not against all hosts 
responding via multicast to all other hosts, so that a full mesh can be 
established ahead of time. The idea of minimizing the table to an 
as-needed basis should not have continued with IPv6. Special provisions 
could be handled when dealing with proxy-ND, but I'm not sure that is 
needed either.


More information about the NANOG mailing list