Re: [v6ops] [dhcwg] [EXTERNAL] Question to DHCPv6 Relay Implementors regarding draft-ietf-dhc-dhcpv6-pd-relay-requirements
"Templin (US), Fred L" <Fred.L.Templin@boeing.com> Wed, 07 October 2020 14:27 UTC
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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
To: "otroan@employees.org" <otroan@employees.org>
CC: "ianfarrer@gmx.com" <ianfarrer@gmx.com>, v6ops list <v6ops@ietf.org>, 6man WG <ipv6@ietf.org>, dhcwg <dhcwg@ietf.org>
Thread-Topic: [dhcwg] [EXTERNAL] Question to DHCPv6 Relay Implementors regarding draft-ietf-dhc-dhcpv6-pd-relay-requirements
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Date: Wed, 07 Oct 2020 14:26:56 +0000
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Subject: Re: [v6ops] [dhcwg] [EXTERNAL] Question to DHCPv6 Relay Implementors regarding draft-ietf-dhc-dhcpv6-pd-relay-requirements
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Ole, are you talking about the amnesiac client case - such as, the client reboots and then comes back to life again with no memory of its past lifetime? Our lease lifetimes are short - generally about 30 seconds - so any stale leases should be very transient. But, our relays also retain knowledge about the client<->server interactions and in some sense act as a proxy for the client. So, the relay itself will clean up after an amnesiac client when it detects that the client has suffered a traumatic event. Fred > -----Original Message----- > From: otroan@employees.org [mailto:otroan@employees.org] > Sent: Wednesday, October 07, 2020 6:55 AM > To: Templin (US), Fred L <Fred.L.Templin@boeing.com> > Cc: ianfarrer@gmx.com; v6ops list <v6ops@ietf.org>; 6man WG <ipv6@ietf.org>; dhcwg <dhcwg@ietf.org> > Subject: Re: [dhcwg] [EXTERNAL] Question to DHCPv6 Relay Implementors regarding draft-ietf-dhc-dhcpv6-pd-relay-requirements > > This message was sent from outside of Boeing. Please do not click links or open attachments unless you recognize the sender and > know that the content is safe. > > > > > On 7 Oct 2020, at 15:50, Templin (US), Fred L <Fred.L.Templin@boeing.com> wrote: > > > > We implement DHCPv6 PD on relays. The relay is always co-resident with the > > delegating server and behaves according to RFC6221. Are we covered? > > What's your experience with implementing section 3.5 / R-4? > > Cheers, > Ole > > > > > Thanks - Fred > > > > From: dhcwg [mailto:dhcwg-bounces@ietf.org] On Behalf Of ianfarrer@gmx.com > > Sent: Wednesday, October 07, 2020 3:26 AM > > To: v6ops list <v6ops@ietf.org>; ipv6@ietf.org > > Cc: dhcwg <dhcwg@ietf.org> > > Subject: [EXTERNAL] [dhcwg] Question to DHCPv6 Relay Implementors regarding draft-ietf-dhc-dhcpv6-pd-relay-requirements > > > > This message was sent from outside of Boeing. Please do not click links or open attachments unless you recognize the sender and > know that the content is safe. > > > > > > Hi, > > > > We are currently finishing WGLC for this draft. It describes requirements for a 'DHCPv6 Delegating Relay' - this is a router functioning > as the L3 edge and DHCPv6 relay (only) with prefix delegation. This is a common deployment scenario, but RFC3633/8415 only really > describes PD using a Delegating Router - i.e the L3 edge also functions as a DHCPv6 server with no relay. When the relay and server > functions are performed by separate devices a number of problems with how relays behave have > > been observed, so this document addresses them. > > > > During WGLC for this, Ole raised a comment related to one of the routing requirements: > > > > R-4: If the relay has learned a route for a delegated prefix via a > > given interface, and receives traffic on this interface with > > a destination address within the delegated prefix (that is > > not an on-link prefix for the relay), then it MUST be > > dropped. This is to prevent routing loops. An ICMPv6 Type > > 1, Code 6 (Destination Unreachable, reject route to > > destination) error message MAY be sent back to the client. > > The ICMP policy SHOULD be configurable. > > > > The problem that this is trying to solve is: > > > > 3.5. Forwarding Loops between Client and Relay > > > > If the client loses information about a prefix that it is delegated > > while the lease entry and associated route is still active in the > > delegating relay, then the relay will forward traffic to the client > > which the client will return to the relay (which is the client's > > default gateway (learnt via an RA). The loop will continue until > > either the client is successfully reprovisioned via DHCP, or the lease > > ages out in the relay. > > > > Ole’s comment: "And I would also be happy if we could have some implementors chime in with a "we are happy and able to > implement this requirement”.” > > > > > > We would appreciate any feedback on this, especially from anyone with experience implementing DHCPv6 relays with PD. > > > > > > Thanks, > > Ian > > > > > > Current draft version: https://datatracker.ietf.org/doc/draft-ietf-dhc-dhcpv6-pd-relay-requirements/ > > > > > > _______________________________________________ > > dhcwg mailing list > > dhcwg@ietf.org > > https://www.ietf.org/mailman/listinfo/dhcwg
- [v6ops] Question to DHCPv6 Relay Implementors reg… ianfarrer
- Re: [v6ops] [EXTERNAL] [dhcwg] Question to DHCPv6… Templin (US), Fred L
- Re: [v6ops] [dhcwg] [EXTERNAL] Question to DHCPv6… otroan
- Re: [v6ops] [dhcwg] [EXTERNAL] Question to DHCPv6… Templin (US), Fred L
- Re: [v6ops] [dhcwg] [EXTERNAL] Question to DHCPv6… otroan
- Re: [v6ops] [dhcwg] [EXTERNAL] Question to DHCPv6… Templin (US), Fred L
- Re: [v6ops] [dhcwg] [EXTERNAL] Question to DHCPv6… Templin (US), Fred L
- Re: [v6ops] [dhcwg] [EXTERNAL] Question to DHCPv6… Templin (US), Fred L
- Re: [v6ops] Question to DHCPv6 Relay Implementors… Michael Richardson
- Re: [v6ops] [dhcwg] Question to DHCPv6 Relay Impl… Jen Linkova
- Re: [v6ops] [EXTERNAL] Re: [dhcwg] Question to DH… Templin (US), Fred L
- Re: [v6ops] Question to DHCPv6 Relay Implementors… ianfarrer
- Re: [v6ops] [EXTERNAL] Re: [dhcwg] Question to DH… ianfarrer
- Re: [v6ops] Question to DHCPv6 Relay Implementors… Michael Richardson
- Re: [v6ops] [EXTERNAL] Re: [dhcwg] Question to DH… Bernie Volz (volz)
- Re: [v6ops] [EXTERNAL] Re: [dhcwg] Question to DH… Templin (US), Fred L
- Re: [v6ops] [EXTERNAL] Re: [dhcwg] Question to DH… Ole Troan
- Re: [v6ops] [EXTERNAL] Re: [dhcwg] Question to DH… Templin (US), Fred L
- Re: [v6ops] [EXTERNAL] Re: [dhcwg] Question to DH… Templin (US), Fred L
- Re: [v6ops] [EXTERNAL] Re: [dhcwg] Question to DH… Bernie Volz (volz)
- Re: [v6ops] [EXTERNAL] Re: [dhcwg] Question to DH… Jen Linkova
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Question to DH… Jen Linkova
- Re: [v6ops] [dhcwg] Question to DHCPv6 Relay Impl… Jen Linkova
- Re: [v6ops] [EXTERNAL] Re: Question to DHCPv6 Rel… Bjørn Mork
- Re: [v6ops] [EXTERNAL] Re: Question to DHCPv6 Rel… Ole Troan
- Re: [v6ops] [EXTERNAL] Re: Question to DHCPv6 Rel… Bjørn Mork
- Re: [v6ops] [EXTERNAL] Re: [dhcwg] Question to DH… Jen Linkova
- Re: [v6ops] [dhcwg] Question to DHCPv6 Relay Impl… Vasilenko Eduard
- Re: [v6ops] [dhcwg] Question to DHCPv6 Relay Impl… Vasilenko Eduard
- Re: [v6ops] [dhcwg] Question to DHCPv6 Relay Impl… ianfarrer
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Question to DH… Templin (US), Fred L
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Question to DH… Michael Richardson
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Question to DH… ianfarrer
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Question to DH… Bernie Volz (volz)
- Re: [v6ops] [dhcwg] Re: Question to DHCPv6 Relay … Templin (US), Fred L
- Re: [v6ops] [dhcwg] Re: Question to DHCPv6 Relay … ianfarrer
- Re: [v6ops] [EXTERNAL] Re: [dhcwg] Re: Question t… Templin (US), Fred L
- Re: [v6ops] [dhcwg] Re: Question to DHCPv6 Relay … Michael Richardson
- Re: [v6ops] [EXTERNAL] Re: [dhcwg] Re: Question t… Templin (US), Fred L
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Re: Question t… Ted Lemon
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Re: Question t… Templin (US), Fred L
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Re: Question t… Ted Lemon
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Re: Question t… Templin (US), Fred L
- Re: [v6ops] [dhcwg] Re: Question to DHCPv6 Relay … Philip Homburg
- Re: [v6ops] [EXTERNAL] Re: [dhcwg] Re: Question t… Templin (US), Fred L
- Re: [v6ops] [EXTERNAL] Re: [dhcwg] Re: Question t… Michael Richardson
- Re: [v6ops] [EXTERNAL] Re: [dhcwg] Re: Question t… Templin (US), Fred L
- Re: [v6ops] [EXTERNAL] [dhcwg] Re: Question to DH… Bob Hinden
- Re: [v6ops] [EXTERNAL] [dhcwg] Re: Question to DH… Templin (US), Fred L
- Re: [v6ops] [EXTERNAL] [dhcwg] Re: Question to DH… Bob Hinden
- Re: [v6ops] [EXTERNAL] [dhcwg] Re: Question to DH… Templin (US), Fred L
- Re: [v6ops] [EXTERNAL] [dhcwg] Re: Question to DH… Bob Hinden
- Re: [v6ops] [EXTERNAL] Re: [dhcwg] Re: Question t… Michael Richardson
- Re: [v6ops] [EXTERNAL] [dhcwg] Re: Question to DH… Michael Richardson
- Re: [v6ops] [EXTERNAL] [dhcwg] Re: Question to DH… Bob Hinden
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Question to DH… Jen Linkova
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Question to DH… Jen Linkova
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Question to DH… Bernie Volz (volz)
- Re: [v6ops] [EXTERNAL] Re: [dhcwg] Re: Question t… Templin (US), Fred L
- Re: [v6ops] [EXTERNAL] [dhcwg] Re: Question to DH… Vasilenko Eduard
- Re: [v6ops] [dhcwg] Re: Question to DHCPv6 Relay … Templin (US), Fred L
- Re: [v6ops] [dhcwg] Re: Question to DHCPv6 Relay … Vasilenko Eduard
- Re: [v6ops] [dhcwg] Re: Question to DHCPv6 Relay … Templin (US), Fred L
- Re: [v6ops] [dhcwg] Re: Question to DHCPv6 Relay … otroan
- Re: [v6ops] [dhcwg] Re: Question to DHCPv6 Relay … Timothy Winters
- Re: [v6ops] [dhcwg] Re: Question to DHCPv6 Relay … Ted Lemon
- Re: [v6ops] [EXTERNAL] Re: [dhcwg] Re: Question t… Templin (US), Fred L
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Re: Question t… Ms. Li HUANG
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Question to DH… ianfarrer
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Question to DH… Michael Richardson
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Question to DH… ianfarrer
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Question to DH… Michael Richardson
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Question to DH… Jen Linkova
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Question to DH… Bernie Volz (volz)
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Question to DH… Timothy Winters
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Question to DH… Bernie Volz (volz)
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Question to DH… ianfarrer
- Re: [v6ops] [dhcwg] [EXTERNAL] Re: Question to DH… ianfarrer