[Roll] FW: I-D Action: draft-ietf-roll-unaware-leaves-04.txt
"Pascal Thubert (pthubert)" <pthubert@cisco.com> Mon, 09 September 2019 14:34 UTC
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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Routing Over Low power and Lossy networks <roll@ietf.org>
Thread-Topic: [Roll] I-D Action: draft-ietf-roll-unaware-leaves-04.txt
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Subject: [Roll] FW: I-D Action: draft-ietf-roll-unaware-leaves-04.txt
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Dear all; This version syncs with the work in progress on external routes in useofrplinfo, which we extracted from the RFC editor Q. The proposed change is contained in one new section 4.1 and the proposed operation is as follows (candidate change for useofRPLinfo): " 4.1. Updates to RFC6550: Advertise External Routes with Non-Storing Mode Signaling. Section 6.7.8. of [RFC6550] introduces the 'E' flag that is set to indicate that the 6LR that generates the DAO redistributes external targets into the RPL network. An external Target is a Target that has been learned through an alternate protocol, for instance an route to a prefix that is outside the RPL domain but reachable via a 6LR. Being outside of the RPL domain, a node that is reached via an external target cannot be guaranteed to ignore the RPL artifacts and cannot be expected to process the [RFC8138] compression correctly. This means that the RPL artifacts and the compression should be contained in an IP-in-IP encapsulation that is removed by the 6LR. This specification updates RPL [RFC6550] to RECOMMEND that external targets are advertised using Non-Storing Mode signaling even in a Storing-Mode network. This way, all packets to an external target reach the Root that can encapsulate them, and the Root is informed of the address of the 6LR that terminates the IP-in-IP tunnel. In case of an external target, the Root SHOULD use the same IP-in-IP encapsulation for packets that it generates or that are originated within the RPL domain as if the packets were coming from the Internet. A RUL is a special case of external target when the target is actually a host and it is known to support a consumed Routing Header and to ignore a HbH header as prescribed by [RFC8200]. The target may have been learned through as a host route or may have been registered to the 6LR using [RFC8505]. IP-in-IP encapsulation MAY be avoided for Root to RUL communication if the RUL is known to process the packets as forwarded by the parent 6LR without decapsulation. In order to enable IP-in-IP all the way to a 6LN, it is beneficial that the 6LN supports decapsulating IP-in-IP, but that is not assumed by [RFC8504]. If the 6LN is a RUL, the Root that encapsulates a packet SHOULD terminate the tunnel at a parent 6LR unless it is aware that the RUL supports IP-in-IP decapsulation. A node that is reachable over an external route is not expected to support [RFC8138]. Whether a decapsulation took place or not and even when the 6LR is delivering the packet to a RUL, the 6LR that injected the external route MUST uncompress the packet before forwarding over that external route. " Comments welcome; Pascal -----Original Message----- From: Roll <roll-bounces@ietf.org> On Behalf Of internet-drafts@ietf.org Sent: lundi 9 septembre 2019 15:24 To: i-d-announce@ietf.org Cc: roll@ietf.org Subject: [Roll] I-D Action: draft-ietf-roll-unaware-leaves-04.txt A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Routing Over Low power and Lossy networks WG of the IETF. Title : Routing for RPL Leaves Authors : Pascal Thubert Michael C. Richardson Filename : draft-ietf-roll-unaware-leaves-04.txt Pages : 30 Date : 2019-09-09 Abstract: This specification extends RFC6550 and RFC8505 to provide unicast and multicast routing services in a RPL domain to 6LNs that are plain hosts and do not participate to RPL. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-roll-unaware-leaves/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-roll-unaware-leaves-04 https://datatracker.ietf.org/doc/html/draft-ietf-roll-unaware-leaves-04 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-roll-unaware-leaves-04 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ _______________________________________________ Roll mailing list Roll@ietf.org https://www.ietf.org/mailman/listinfo/roll
- [Roll] I-D Action: draft-ietf-roll-unaware-leaves… internet-drafts
- [Roll] FW: I-D Action: draft-ietf-roll-unaware-le… Pascal Thubert (pthubert)