Re: [v6ops] DHCPv6/SLAAC Make Hosts Confusing-//RE: new draft: draft-liu-bonica-v6ops-dhcpv6-slaac-problem

Nick Hilliard <> Tue, 29 October 2013 22:03 UTC

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Subject: Re: [v6ops] DHCPv6/SLAAC Make Hosts Confusing-//RE: new draft: draft-liu-bonica-v6ops-dhcpv6-slaac-problem
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On 29/10/2013 20:52, Andrew Yourtchenko wrote:
> Thanks. Not sure whether it should actually be another section or not -
> "Control plane and data plane" - RAs are sent by an entity that is in the
> path, whereas the DHCPv6 may be sent by an off-path entity...

this brings up another important issue, namely source address validation.

I'm not sure if it's relevant to bring this up in your draft, but the
requirement to handle snooping two new protocols for effective lan source
address validation seems to be more than most vendors can handle at the
moment, which means that as operators we are very exposed to rogue RAs and
rogue DHCPv6 packets flying around networks.

[Once upon a time, all we needed was vendor support for dhcp snooping and
ARP inspection.  Now we need an entire IETF working group to handle the
complication that the IETF has brought upon itself by overthinking ipv6 lan
requirements.  Is this progress?]