[ipv6-wg] RIPE 554 Errata Page

Ivan and Tim,

As long as the 'MLD snooping' is not mandated for a layer-3 switch (and I do agree it is an oxymoron for people on this list) then I am fine. The verbiage could be something in the lines of Tim and Ivan, requiring/make optional MLD snooping ONLY for any layer-2 ports of the layer-3 switch.

> -----Original Message-----
> From: Ivan Pepelnjak [mailto:ipepelnjak at gmail.com]
> Sent: mercredi 29 mai 2013 11:00
> To: Tim Chown
> Cc: Eric Vyncke (evyncke); MarcoH; ipv6-wg at ripe.net
> Subject: Re: [ipv6-wg] RIPE 554 Errata Page
> 
> Have to agree. MLD Snooping should be OPTIONAL (or not required) for L3
> device __that has NO L2 forwarding functionality__.
> 
> Not sure how many devices would match that description, and I'm almost
> positive this is not what Eric is looking for, but this is the only safe way
> to remove MLD snooping requirement.
> 
> Explaining why you don't need MLD snooping on a L3-only port on a L2/L3
> switch is customer education ;) Start by thanking the marketing "wizards"
> that turned bridges and routers into switches.
> 
> Jan & Sander - can we get something along the lines of the first paragraph
> into Errata doc?
> 
> Ivan
> 
> On 29.05.2013 10:33 , Tim Chown wrote:
> > On 29 May 2013, at 08:43, Eric Vyncke (evyncke) <evyncke at cisco.com> wrote:
> > [...]
> >> As a vendor, we have an issue with 'MLD snooping (RFC 4541)' for a layer-
> 3 device/switch which of course if you are a layer-3 port, you implement MLD
> (RFC 3810) as stated in RIPE 554 but you do not implement the snooping which
> is applicable to a layer-2 port. It can appear as splitting hair but you
> cannot imagine the number of hours/calls I have to spend on this hair
> splitting... So, please remove the MLD snooping requirement from a layer-3
> device.
> > You say "layer-3 device/switch", I think you really mean "layer 3-only
> device". If the device offers any layer 2 functionality, MLD snooping
> becomes important. We had this issue with a specific brand of printer that
> fell over in the face of seeing a few HD IPv6 IP-TV channels only last
> month.