disabling client use of SLAAC

Bernhard Schmidt berni at birkenwald.de
Sun Mar 7 00:42:51 CET 2010


On 06.03.2010 22:41, Mark Smith wrote:

Bernhard

>> Autoconf doesn't work for on>64 bit prefixes, so extending it to an 80
>> is a [interesting] way of disabling it completely.
> So is announcing RA Prefix Information options without the
> autonomous address-configuration flag set. I'd doubt anybody
> would be willing to standardise hack like that when there is already a
> proper way to stop nodes autoconfiguring addresses.

Except it doesn't work everywhere, for example it's not available in the 
most recent NX-OS 4.2 (Cisco Nexus 7000). You can either do "ipv6 nd 
suppress-ra" on that platform (which had (has?) the nasty problem of one 
RA being sent during software upgrade, hello SLAAC on >500 cluster 
hosts), or use a prefixlen != /64.

Bernhard


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