# Re: \[PATCH\] IPv6: Fix Prefix Length of Link-local Addresses

- From: Derek Fawcus \<hidden\>
- Date: 2002-10-09 23:46:36 
- List: netdev
- Page: https://ratatoskr.run/netdev/2002/10/495207

```text
On Thu, Oct 10, 2002 at 08:41:52AM +0900, Yuji Sekiya wrote:
> 
> The reason we change the prefix length  from /10 to /64 is
> following spec and adapting other imprementations.

I said I wouldn't comment futher on the spec issue.

I know of at least one other implementation that allows any set of bits
within the link local range to be specified.  (Two if you include the
current/previous Linux behaviour :-)

Changing to restrict the allowed link local addresses doesn't _enhance_
interoperability.  Leaving it as it is/was doesn't harm anything.

DF
```