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Re: [Lsr] Flow Control Discussion for IS-IS Flooding Speed

Tony Li <tony1athome@gmail.com> Wed, 19 February 2020 03:09 UTC

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From: Tony Li <tony1athome@gmail.com>
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Date: Wed, 19 Feb 2020 14:09:42 +1100
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To: Les Ginsberg <ginsberg@cisco.com>
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Subject: Re: [Lsr] Flow Control Discussion for IS-IS Flooding Speed
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> https://datatracker.ietf.org/doc/draft-ginsberg-lsr-isis-flooding-scale/ <https://datatracker.ietf.org/doc/draft-ginsberg-lsr-isis-flooding-scale/>  advocates for a transmit based flow control where the transmitter monitors the number of unacknowledged LSPs sent on each interface and implements a backoff algorithm to slow the rate of sending LSPs based on the length of the per interface unacknowledged queue.


Les,

This makes the assumption that there is a per-interface queue on the LSP receiver. That has never been the case on any implementation that I’ve ever seen.

Without this assumption or more information, it seems difficult for the LSP transmitter to have enough information about how to proceed.

Tony

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