How to preempt rogue RAs?

Michael Sinatra michael at
Sat Oct 30 22:36:00 CEST 2010

On 10/30/10 12:19, Steinar H. Gunderson wrote:
> Den 30. oktober 2010 21:13 skrev Michael Sinatra
> <michael at>  følgende:
>> A quick and dirty solution would be to configure the real ISP routers that
>> are providing the native IPv6 service to set the RA preference to "high."
> FWIW, he said that they already did, and it doesn't help.

Indeed, I now see that.  Have you checked on the wire to make sure the 
RAs really have preference "high"?  We were able to solve very similar 
symptoms with that configuration, so a bug in the actual router 
implementation may be the culprit.  It may also be useful to look on the 
wire to see if anyone else is announcing with preference "high."


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