Re: [dhcwg] [EXTERNAL] Question to DHCPv6 Relay Implementors regarding draft-ietf-dhc-dhcpv6-pd-relay-requirements
otroan@employees.org Wed, 07 October 2020 13:54 UTC
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Subject: Re: [dhcwg] [EXTERNAL] Question to DHCPv6 Relay Implementors regarding draft-ietf-dhc-dhcpv6-pd-relay-requirements
From: otroan@employees.org
In-Reply-To: <bb7c15dd4ba04730bd062a03861827ba@boeing.com>
Date: Wed, 07 Oct 2020 15:54:54 +0200
Cc: "ianfarrer@gmx.com" <ianfarrer@gmx.com>, v6ops list <v6ops@ietf.org>, 6man WG <ipv6@ietf.org>, dhcwg <dhcwg@ietf.org>
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To: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
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> 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
- Question to DHCPv6 Relay Implementors regarding d… ianfarrer
- RE: [EXTERNAL] [dhcwg] Question to DHCPv6 Relay I… Templin (US), Fred L
- Re: [dhcwg] [EXTERNAL] Question to DHCPv6 Relay I… otroan
- RE: [dhcwg] [EXTERNAL] Question to DHCPv6 Relay I… Templin (US), Fred L
- Re: [dhcwg] [EXTERNAL] Question to DHCPv6 Relay I… otroan
- RE: [dhcwg] [EXTERNAL] Question to DHCPv6 Relay I… Templin (US), Fred L
- RE: [dhcwg] [EXTERNAL] Question to DHCPv6 Relay I… Templin (US), Fred L
- RE: [dhcwg] [EXTERNAL] Question to DHCPv6 Relay I… Templin (US), Fred L
- Re: Question to DHCPv6 Relay Implementors regardi… Michael Richardson
- Re: [dhcwg] Question to DHCPv6 Relay Implementors… Jen Linkova
- Re: Question to DHCPv6 Relay Implementors regardi… ianfarrer
- RE: [EXTERNAL] Re: [dhcwg] Question to DHCPv6 Rel… Templin (US), Fred L
- Re: [EXTERNAL] Re: [dhcwg] Question to DHCPv6 Rel… ianfarrer
- Re: Question to DHCPv6 Relay Implementors regardi… 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: [dhcwg] [v6ops] [EXTERNAL] Re: Question to DH… Jen Linkova
- Re: [dhcwg] Question to DHCPv6 Relay Implementors… 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: [EXTERNAL] Re: [dhcwg] Question to DHCPv6 Rel… Jen Linkova
- RE: [dhcwg] Question to DHCPv6 Relay Implementors… Vasilenko Eduard
- RE: [dhcwg] Question to DHCPv6 Relay Implementors… Vasilenko Eduard
- Re: [dhcwg] Question to DHCPv6 Relay Implementors… ianfarrer
- RE: [dhcwg] [v6ops] [EXTERNAL] Re: Question to DH… Templin (US), Fred L
- Re: [dhcwg] [v6ops] [EXTERNAL] Re: Question to DH… Michael Richardson
- Re: [dhcwg] [v6ops] [EXTERNAL] Re: Question to DH… ianfarrer
- RE: [dhcwg] [v6ops] [EXTERNAL] Re: Question to DH… Bernie Volz (volz)
- RE: [dhcwg] [v6ops] Re: Question to DHCPv6 Relay … Templin (US), Fred L
- Re: [dhcwg] [v6ops] Re: Question to DHCPv6 Relay … ianfarrer
- RE: [EXTERNAL] Re: [dhcwg] [v6ops] Re: Question t… Templin (US), Fred L
- Re: [dhcwg] [v6ops] Re: Question to DHCPv6 Relay … Michael Richardson
- RE: [EXTERNAL] Re: [dhcwg] [v6ops] Re: Question t… Templin (US), Fred L
- Re: [dhcwg] [EXTERNAL] Re: [v6ops] Re: Question t… Ted Lemon
- RE: [dhcwg] [EXTERNAL] Re: [v6ops] Re: Question t… Templin (US), Fred L
- Re: [dhcwg] [EXTERNAL] Re: [v6ops] Re: Question t… Ted Lemon
- RE: [dhcwg] [EXTERNAL] Re: [v6ops] Re: Question t… Templin (US), Fred L
- Re: [v6ops] [dhcwg] Re: Question to DHCPv6 Relay … Philip Homburg
- RE: [EXTERNAL] Re: [dhcwg] [v6ops] Re: Question t… Templin (US), Fred L
- Re: [EXTERNAL] Re: [dhcwg] [v6ops] Re: Question t… Michael Richardson
- RE: [EXTERNAL] Re: [dhcwg] [v6ops] Re: Question t… Templin (US), Fred L
- Re: [EXTERNAL] [dhcwg] [v6ops] Re: Question to DH… Bob Hinden
- RE: [EXTERNAL] [dhcwg] [v6ops] Re: Question to DH… Templin (US), Fred L
- Re: [EXTERNAL] [dhcwg] [v6ops] Re: Question to DH… Bob Hinden
- RE: [EXTERNAL] [dhcwg] [v6ops] Re: Question to DH… Templin (US), Fred L
- Re: [EXTERNAL] [dhcwg] [v6ops] Re: Question to DH… Bob Hinden
- Re: [EXTERNAL] Re: [dhcwg] [v6ops] Re: Question t… Michael Richardson
- Re: [EXTERNAL] [dhcwg] [v6ops] Re: Question to DH… Michael Richardson
- how do routers with DHCPv6 relays learn when they… Michael Richardson
- Re: [EXTERNAL] [dhcwg] [v6ops] Re: Question to DH… Bob Hinden
- Re: [dhcwg] [v6ops] [EXTERNAL] Re: Question to DH… Jen Linkova
- Re: [dhcwg] [v6ops] [EXTERNAL] Re: Question to DH… Jen Linkova
- Re: [dhcwg] [v6ops] [EXTERNAL] Re: Question to DH… Bernie Volz (volz)
- RE: [EXTERNAL] Re: [dhcwg] [v6ops] Re: Question t… Templin (US), Fred L
- RE: [EXTERNAL] [dhcwg] [v6ops] Re: Question to DH… Vasilenko Eduard
- RE: [dhcwg] [v6ops] Re: Question to DHCPv6 Relay … Templin (US), Fred L
- RE: [dhcwg] [v6ops] Re: Question to DHCPv6 Relay … Vasilenko Eduard
- RE: [dhcwg] [v6ops] Re: Question to DHCPv6 Relay … Templin (US), Fred L
- Re: [dhcwg] [v6ops] Re: Question to DHCPv6 Relay … otroan
- Re: [dhcwg] [v6ops] Re: Question to DHCPv6 Relay … Timothy Winters
- Re: [dhcwg] [v6ops] Re: Question to DHCPv6 Relay … Ted Lemon
- RE: [EXTERNAL] Re: [dhcwg] [v6ops] Re: Question t… Templin (US), Fred L
- Re: [dhcwg] [EXTERNAL] Re: [v6ops] Re: Question t… Ms. Li HUANG