Bob,
Take a look at Section 4.2. The pseudocode is pretty specific.
Ron
Juniper Business Use Only
-----Original Message-----
From: Bob Hinden <[email protected]>
Sent: Sunday, December 1, 2019 5:56 PM
To: Ron Bonica <[email protected]>
Cc: Bob Hinden <[email protected]>; Mark Smith <[email protected]>;
SPRING WG <[email protected]>
Subject: Re: [spring] SRv6 Network Programming and Link Local Source Addresses
Ron,
> On Dec 1, 2019, at 2:47 PM, Ron Bonica <[email protected]> wrote:
>
> Mark, Bob,
>
> Yes, I agree that routers should not forward packets with link local source
> addresses.
or Destination addresses.
>
> Pablo,
>
> Maybe we should update section 4.2 of the network programming draft to
> reflect this?
I was thinking that unless network programming has text that might cause one to
think it overrides the defined behavior from rfc4291 for link-local addresses,
I am not sure it has to be mentioned.
Bob
>
> Ron
>
>
> From: Mark Smith <[email protected]>
> Sent: Sunday, December 1, 2019 5:31 PM
> To: Bob Hinden <[email protected]>
> Cc: Ron Bonica <[email protected]>; SPRING WG <[email protected]>
> Subject: Re: [spring] SRv6 Network Programming and Link Local Source Addresses
>
>
>
> On Mon, 2 Dec 2019, 08:35 Bob Hinden, <[email protected]> wrote:
> Ron,
>
> > On Nov 30, 2019, at 12:36 PM, Ron Bonica
> > <[email protected]> wrote:
> >
> > Pablo,
> >
> >
> >
> > Consider the packet (SA,DA) (S3, S2, S1; SL) where:
> >
> >
> >
> > • SA is link-local (fe80)
> > • DA, S3, S2, and S1 are all END.X
> >
> >
> > Section 4.2 suggests that this packet will be delivered over multiple hops
> > to its destination, regardless of its link-local source address.
>
> I would think that RFC2460 Section 2.5.6. "Link-Local IPv6 Unicast Addresses”
> covers this:
>
> Link-Local addresses are for use on a single link. Link-Local
> addresses have the following format:
>
> | 10 |
> | bits | 54 bits | 64 bits |
> +----------+-------------------------+----------------------------+
> |1111111010| 0 | interface ID |
> +----------+-------------------------+----------------------------+
>
> Link-Local addresses are designed to be used for addressing on a
> single link for purposes such as automatic address configuration,
> neighbor discovery, or when no routers are present.
>
> Routers must not forward any packets with Link-Local source or
> destination addresses to other links.
>
> I think that's RFC4291.
>
> RFC4007, "IPv6 Scoped Address Architecture" does too, more generally and
> probably more formally, in particular section 9, "Forwarding".
>
> Regards,
> Mark.
>
>
>
> Bob
>
>
> >
> >
> >
> > Is this the case?
> >
> >
> >
> > Ron
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > Juniper Business Use Only
> > _______________________________________________
> > spring mailing list
> > [email protected]
> > https://www.ietf.org/mailman/listinfo/spring
>
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>
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