On Thu, 2011-02-10 at 20:33 +0100, Daniel Roesen wrote:
Be aware, that IGMP snooping breaks some(!) IPv6 multicast (e.g. DHCPv6). Affects whole EX-series and current plan is to fix it sometime end of year (Q4 release). If you use IPv4 multicast and need IGMP snooping to prevent flooding and plan to use e.g. stateful DHCPv6, that might be a showstopper for now and the VLANs where IGMP snooping is enabled.
Not disagreeing, I've never met this device, just curious about the problem and wondering if it is a generic class of problem. Is this device supposed to be IPv6-capable? If so, IGMP snooping and MLD snooping should be able to coexist, I'd have thought. In fact, it will be a major blow for the future of dual-stacking if they can't. So is the problem of which you speak just a bug, or is it an artifact of the switch not being IPv6 capable and so limiting broadcasts at the ethernet level to IGMP-discovered listeners only, ignoring IPv6 multicast listeners? Or something :-) Also. why does it only affect DHCPv6? Or was that just an example of a service that would be affected by the problem? Regards, K. -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Karl Auer (kauer@biplane.com.au) +61-2-64957160 (h) http://www.biplane.com.au/kauer/ +61-428-957160 (mob) GPG fingerprint: DA41 51B1 1481 16E1 F7E2 B2E9 3007 14ED 5736 F687 Old fingerprint: B386 7819 B227 2961 8301 C5A9 2EBC 754B CD97 0156