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Re: [ippm] [Technical Errata Reported] RFC7497 (7505)

"MORTON JR., AL" <acmorton@att.com> Mon, 01 May 2023 20:49 UTC

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From: "MORTON JR., AL" <acmorton@att.com>
To: Dave Taht <dave.taht@gmail.com>
CC: "ippm@ietf.org" <ippm@ietf.org>
Thread-Topic: [ippm] [Technical Errata Reported] RFC7497 (7505)
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Date: Mon, 01 May 2023 20:48:58 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ippm/RneZB8s1LYIaGzCDo_ua6D6lou0>
Subject: Re: [ippm] [Technical Errata Reported] RFC7497 (7505)
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> -----Original Message-----
> From: Dave Taht <dave.taht@gmail.com>
> Sent: Friday, April 28, 2023 12:16 PM
> To: MORTON JR., AL <acmorton@att.com>
> Cc: t petch <ietfa@btconnect.com>; ippm@ietf.org
> Subject: Re: [ippm] [Technical Errata Reported] RFC7497 (7505)
> 
> Not that this is the right place or thread to report this, but I
> regard the present bug in udp handling for multiple ip addresses a
> major problem in deployment.
> 

Hi Dave,

We know you like to stir-up controversy occasionally, but "major problem in deployment" goes a bit too far.

We have many-many server deployments around, and have not encountered an issue with this udp-bug in any of them.

You have a unique Lab setup where this issue emerged: a single server with N interfaces, and each egress interface is configured to implement the traffic control for a specific service plan. 
If you deployed N server instances, each bound to a single interface with a single IPaddrs on that interface (on different LANs), you would get the ingress-egress interface pairing you seek.

UDPST code allows you to bind each server instance to an IPaddrs. We use this capability to manage load on the servers now. This seems to be a solution to try. Only in an isolated test situation, using a single instance with many interfaces, does this issue come up. We can work with you to reach an alternate config that works in your lab.

And, please move any further discussion to the GitHub issue thread. 
https://github.com/BroadbandForum/obudpst/issues/9
Here, it's Off-topic.

regards,
Len and Al

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