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Re: [netconf] draft-ietf-netconf-udp-notif :: transport source IP/interface/VRF

Ebben Aries <exa@juniper.net> Wed, 20 March 2024 02:45 UTC

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Date: Wed, 20 Mar 2024 12:45:14 +1000
From: Ebben Aries <exa@juniper.net>
To: Alex Huang Feng <alex.huang-feng@insa-lyon.fr>
Cc: netconf@ietf.org
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netconf/qpxddSkNv7mFtotlhqc7TSvidHc>
Subject: Re: [netconf] draft-ietf-netconf-udp-notif :: transport source IP/interface/VRF
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Thx Alex

Note, this is not unique to UDP but on a system w/ many interfaces and
potential VRF mappings, the ability to "pin" a source becomes more
important.

Unless such a construct/grouping is already nested underneath a
VRF/network-instance, an IP address by itself is insufficient for both
source + destination

default: eth0/10.1.1.1
default: lo0/192.168.1.1
network-instance (1): eth1/10.1.1.1
network-instance (1): lo1/192.168.1.1
network-instance (2): eth2/10.1.1.1
network-instance (2): lo2/192.168.1.1

Could have any source/destination combination/overlap inter/intra-NI
that needs to be distinguished

On 2024-03-20 11:24:26, Alex Huang Feng wrote:
> [External Email. Be cautious of content]
> 
> 
> Hi Ebben,
> 
> Thanks for reaching out.
> That’s a good point.
> We can add the local-address (and local-port) in the UDP-notif model so that the operator can configure it optionally.
> 
> I will also add this local-address and local-port in the generic udp-client-grouping (draft-ietf-netconf-udp-client-server).
> 
> Regards,
> Alex
> 
> > On 19 Mar 2024, at 13:42, Ebben Aries <exa=40juniper.net@dmarc.ietf.org> wrote:
> >
> > Section 3.2 states
> >
> > ---
> >  If Message Publisher ID unicity is not preserved through the
> >  collection domain, the source IP address of the UDP datagram SHOULD be
> >  used in addition to the Message Publisher ID to identify the
> >  information source.
> > ---
> >
> > It seems for configured "dial-out" transports, we are missing a
> > definition of the source IP or interface (the latter of which would need
> > a selection mechanism, prior a VRF reference) which is crucial for
> > receivers to distinguish (generally an identity that is stable - e.g.
> > loopback) sources.
> >
> > I've only briefed through this draft and not other transports so this
> > may very well apply to others as well
> >
> > _______________________________________________
> > netconf mailing list
> > netconf@ietf.org
> > https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/netconf__;!!NEt6yMaO-gk!Fd_LCibn6pzPiClNoiJ7Sc-VkEdRqQLMWKguMOMhOxdlp7IMLxGVbBN3XKj3aICsuokIOXnHZt9e8XMnBCie-aDmJCHu$
>

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