RE: [v6ops] [EXTERNAL] Re: [dhcwg] Question to DHCPv6 Relay Implementors regarding draft-ietf-dhc-dhcpv6-pd-relay-requirements
"Templin (US), Fred L" <Fred.L.Templin@boeing.com> Thu, 08 October 2020 22:08 UTC
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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
To: Ole Troan <otroan@employees.org>
CC: "Bernie Volz (volz)" <volz@cisco.com>, "ianfarrer@gmx.com" <ianfarrer@gmx.com>, dhcwg <dhcwg@ietf.org>, v6ops list <v6ops@ietf.org>, 6man <ipv6@ietf.org>
Subject: RE: [v6ops] [EXTERNAL] Re: [dhcwg] Question to DHCPv6 Relay Implementors regarding draft-ietf-dhc-dhcpv6-pd-relay-requirements
Thread-Topic: [v6ops] [EXTERNAL] Re: [dhcwg] Question to DHCPv6 Relay Implementors regarding draft-ietf-dhc-dhcpv6-pd-relay-requirements
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Date: Thu, 08 Oct 2020 22:08:37 +0000
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Ole, > -----Original Message----- > From: Ole Troan [mailto:otroan@employees.org] > Sent: Thursday, October 08, 2020 3:00 PM > To: Templin (US), Fred L <Fred.L.Templin@boeing.com> > Cc: Bernie Volz (volz) <volz@cisco.com>; ianfarrer@gmx.com; dhcwg <dhcwg@ietf.org>; v6ops list <v6ops@ietf.org>; 6man > <ipv6@ietf.org> > Subject: Re: [v6ops] [EXTERNAL] Re: [dhcwg] Question to DHCPv6 Relay Implementors regarding draft-ietf-dhc-dhcpv6-pd-relay- > requirements > > > > On 8 Oct 2020, at 23:55, Templin (US), Fred L <Fred.L.Templin@boeing.com> wrote: > > > > Now, client B sends packets destined to an address in A to R, and R forwards the > > packets to client A since it still has a route for A. When the packets arrive at A, > > however, A forwards them back to R since it has "forgotten" that it holds the > > prefix A. When R receives the packets from A with destination address also > > from prefix A, it must drop them instead of forwarding them back to A to > > avoid looping. > > This is indeed what the requirement in the draft says. > This isn’t quite obvious how to implement, which why I brought up the question if anyone had implemented this. And if it’s supported > in hw etc. I can tell you how we will do it in AERO/OMNI. R will have an OMNI interface neighbor cache entry (NCE) for A that links the prefix A with the link-layer address of A. Then, when R receives a packet from A's link-layer address it consults its NCE to see that A is the holder of prefix A and therefore not a valid source of packets with destination address in A. We will have this in our code soon - thanks for the catch! Fred > Ole=
- 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