Re: [v6ops] [dhcwg] [EXTERNAL] Question to DHCPv6 Relay Implementors regarding draft-ietf-dhc-dhcpv6-pd-relay-requirements
otroan@employees.org Wed, 07 October 2020 14:39 UTC
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From: otroan@employees.org
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Date: Wed, 07 Oct 2020 16:39:05 +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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Subject: Re: [v6ops] [dhcwg] [EXTERNAL] Question to DHCPv6 Relay Implementors regarding draft-ietf-dhc-dhcpv6-pd-relay-requirements
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> On 7 Oct 2020, at 16:26, Templin (US), Fred L <Fred.L.Templin@boeing.com> wrote: > > 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. No the routing loop detection code on the relay. Cheers, Ole > >> -----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