On Wed, 2011-03-09 at 09:05 +0100, Eric Vyncke (evyncke) wrote: > If using Cisco switches, then you can use an Port ACL or even the RA > guard (both available on most recent switches with the software > release of Summer 2010). be careful with raguard on the 6500, for more details check: <http://lists.cluenet.de/pipermail/ipv6-ops/2010-November/004368.html> --Daniel.