Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08 - Respond by May 30th, 2017
Timothy Winters <twinters@iol.unh.edu> Mon, 19 June 2017 18:32 UTC
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From: Timothy Winters <twinters@iol.unh.edu>
Date: Mon, 19 Jun 2017 14:32:22 -0400
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To: "Bernie Volz (volz)" <volz@cisco.com>
Cc: JINMEI Tatuya / 神明達哉 <jinmei.tatuya@gmail.com>, "dhcwg@ietf.org" <dhcwg@ietf.org>, Ralph Droms <rdroms.ietf@gmail.com>
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Subject: Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08 - Respond by May 30th, 2017
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Hi Bernie, We have CE Routers that countdown from when the IA_PD is received, and others that always transmit the lifetime received in the IA_PD in RA (Always the same). It's about 50/50 at the moment. When we were working on testing for 6024/7084 this was a topic that was discussed but it wasn't clear answer on what to do with the lifetimes. You are correct that when the prefix timeout from the IA_PD it will stop forwarding and transmit a Destination Unreachable message. Regards, Tim On Mon, Jun 19, 2017 at 2:10 PM, Bernie Volz (volz) <volz@cisco.com> wrote: > I’ve added Tim Winters as perhaps he can shed some light on this in terms > of what is tested at the NH Interoperability Lab for PD / CPEs? > > Even if a device doesn’t follow this (running down the lifetimes), what’s > likely to happen when the PD expires is that the traffic will hopefully no > longer be forwarded by the router (and with a ICMP destination unreachable > notification) and perhaps RAs will be sent with 0 lifetimes to attempt to > deprecate the prefix (and any assigned addresses) use as quickly as > possible? > > Ralph or Ole might also have a comment with respect to what they expected > a requesting router to do based on the original RFC 3633? I don’t think > this 3315bis document itself caused this potential confusion to exist? > > - Bernie > > On 6/19/17, 1:55 PM, "JINMEI Tatuya / 神明達哉" <jinmei.tatuya@gmail.com> > wrote: > > At Sat, 17 Jun 2017 02:27:39 +0000, > "Bernie Volz (volz)" <volz@cisco.com> wrote: > > > My reaction is you are wrong – the PIO would, whenever sent, be sent > > with the preferred and valid lifetime REMAINING on the PD lease. So, > > sure a PIO sent just after the PD lease started would have (close) > > to the full values, but the values sent an hour later would be 1 > > hour less than they were. > > Actually I agreed. I guess what we're different is the view on how > obvious it is. I suspect this is not so obvious and there are > actually implementations that can cause the situation where > deprecated/invalidated addresses are used. There may even be an > implementation that naively copies the lifetimes from PD to RA PIO. > > I've monitored RAs advertised in my apartment room. The ISP is > Comcast and the default router is Apple time capsule. The lifetimes > advertised in RA PIO are constant and do not decrease as I monitored > it in multiple consecutive RAs. Of course, it doesn't immediately > mean the time capsule device uses the 'naive' approach. I actually > don't even know if PD is used or the time capsule is the PD client. > And the time capsule might actually have some safety buffer period and > use a much lower lifetimes for PIO than those provided in PD. Still, > I think this can be a potential anecdote to suggest there might be a > problematic implementation. > > So I don't think it at least doesn't harm if we say that lifetimes of > site addresses derived from the delegated prefix MUST NOT exceed the > remaining time of the lifetimes in the last-received corresponding > PD. (I don't think we have to specify exactly how to implement this > restriction). > > -- > JINMEI, Tatuya > > > -- Now offering testing for SDN applications and controllers in our SDN switch test bed. Learn more today http://bit.ly/SDN_IOLPR
- [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08 - R… Bernie Volz (volz)
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… kkinnear
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… 神明達哉
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… Bernie Volz (volz)
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… Bernie Volz (volz)
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… 神明達哉
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… Shawn Routhier
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… Shawn Routhier
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… Bernie Volz (volz)
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… Bernie Volz (volz)
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… 神明達哉
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… 神明達哉
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… Bernie Volz (volz)
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… JINMEI Tatuya / 神明達哉
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… Bernie Volz (volz)
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… Timothy Winters
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… Bernie Volz (volz)
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… Bernie Volz (volz)
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… Bernie Volz (volz)
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… 神明達哉
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… Bernie Volz (volz)
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… Bernie Volz (volz)
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… 神明達哉
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… Alexandre Petrescu
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… Ralph Droms
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… Bernie Volz (volz)
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… 神明達哉
- Re: [dhcwg] WGLC for draft-ietf-dhc-rfc3315bis-08… Alexandre Petrescu