Dear Authors, I've read through this draft with some interest - and it would be remiss of me not to express severe reservations to something that modified packet headers in the manner described.
As such, I've got a couple of questions. 1. What effect will this have on flow analysis if a packet is arriving with a modified DA - that is going to subsequently change 2. What effect will this have on inline systems that draw information from both the SA and DA addresses (think DPI systems) 3. I have significant concerns that the utilization of an IPv6 address in the manner described here could have under unintended and as of yet unknown consequences. As an example, if filtering is done based on destination address, does it not stand to reason that you create an attack vector by allowing an extended next-hop header to programmatically change that which is being filtered on, on the preceding hop. (Yes this is highly theoretical, but - I'd like to hear the authors comments on this) Looking forward to the response Yours Sincerely Andrew Alston From: spring <[email protected]> On Behalf Of [email protected] Sent: Wednesday, 3 July 2019 12:05 To: [email protected] Cc: [email protected] Subject: [spring] I-D Action: draft-ietf-spring-srv6-network-programming-01..txt A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Source Packet Routing in Networking WG of the IETF. Title : SRv6 Network Programming Authors : Clarence Filsfils Pablo Camarillo Garvia John Leddy Daniel Voyer Satoru Matsushima Zhenbin Li Filename : draft-ietf-spring-srv6-network-programming-01.txt Pages : 41 Date : 2019-07-03 Abstract: This document describes the SRv6 network programming concept and its most basic functions. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-spring-srv6-network-programming/<https://datatracker.ietf.org/doc/draft-ietf-spring-srv6-network-programming/> There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-spring-srv6-network-programming-01<https://tools.ietf.org/html/draft-ietf-spring-srv6-network-programming-01> https://datatracker.ietf.org/doc/html/draft-ietf-spring-srv6-network-programming-01<https://datatracker.ietf.org/doc/html/draft-ietf-spring-srv6-network-programming-01> A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-spring-srv6-network-programming-01<https://www.ietf.org/rfcdiff?url2=draft-ietf-spring-srv6-network-programming-01> 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/<ftp://ftp.ietf.org/internet-drafts/> _______________________________________________ spring mailing list [email protected]<mailto:[email protected]> https://www.ietf.org/mailman/listinfo/spring<https://www.ietf.org/mailman/listinfo/spring>
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