Hi Acee,
Thanks for your comments.
MPD is the maximum packet size that can be processed in the data plane, it's
not the maximum size of MPLS stacks or IPv6 headers that can be supported by a
node.
The reason why MPD is defined separately for MPLS and IPv6 is based on the
consideration that the maximum packet size can be processed by a device MAY
differ from the data plane type/ethertype.
Similar with IGP-MSD, this MPD information doesn't influence the routing
decision. It helps when an node needs to increase the packet size that the
downstream nodes need to be processed in data plane (e.g
inserting/encapsulating headers like you mentioned), if the downstream MPDs
aren't sufficient, the node may choose to not to use this feature and log an
error, but it's mainly based implementation decisions.
Regards,
Yao
Original
From: AceeLindem <[email protected]>
To: 刘尧00165286;
Cc: [email protected] <[email protected]>;
Date: 2023年10月12日 19:12
Subject: Re: [Lsr] New Version Notification for draft-liu-lsr-igp-mpd-00.txt
Hi Yao,
I this I see what you are advertising - essentially it is really not the packet
size but the maximum size of the MPLS or IPv6 headers that can be processed in
the data plane. Is that correct? Conceivably, nodes in the IS-IS/OSPF domain
would make routing decisions based on what nodes can process the associated
headers? Or would the IGP nodes use the information to determine whether or not
the features requiring the additional headers can be used? a
Thanks,
Acee
On Oct 11, 2023, at 05:20, [email protected] wrote:
Dear All，
We've submitted a new draft
https://www.ietf.org/archive/id/draft-liu-lsr-igp-mpd-00.html.
This document proposes the concept of Maximum Packet Depth(MPD) to represent
the packet size that a node is able process from an incoming packet, and the
signaling mechanism for MPD in IGP is defined as well.
Welcome your review and comments！
Regards,
Yao
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From: [email protected] <[email protected]>
To: 刘尧00165286;沈益明10054407;
Date: 2023年10月10日 15:21
Subject: New Version Notification for draft-liu-lsr-igp-mpd-00.txt
A new version of Internet-Draft draft-liu-lsr-igp-mpd-00.txt has been
successfully submitted by Yao Liu and posted to the
IETF repository.
Name: draft-liu-lsr-igp-mpd
Revision: 00
Title: Signaling Maximum Packet Depth(MPD) using IGP
Date: 2023-10-10
Group: Individual Submission
Pages: 9
URL: https://www.ietf.org/archive/id/draft-liu-lsr-igp-mpd-00.txt
Status: https://datatracker.ietf.org/doc/draft-liu-lsr-igp-mpd/
HTML: https://www.ietf.org/archive/id/draft-liu-lsr-igp-mpd-00.html
HTMLized: https://datatracker.ietf.org/doc/html/draft-liu-lsr-igp-mpd
Abstract:
This document proposes the concept of Maximum Packet Depth(MPD) to
represent the packet size that a node is able process from an
incoming packet, the signaling mechanism for MPD in IGP is also
defined.
The IETF Secretariat
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