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Re: [homenet] DNCP/HNCP Revisited

Ted Lemon <mellon@fugue.com> Wed, 18 September 2019 23:30 UTC

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From: Ted Lemon <mellon@fugue.com>
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Date: Wed, 18 Sep 2019 19:30:40 -0400
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References: <877e65b3rd.wl-jch@irif.fr>
Cc: Gert Doering <gert@space.net>, "Ray Hunter (v6ops)" <v6ops@globis.net>, HOMENET <homenet@ietf.org>
In-Reply-To: <877e65b3rd.wl-jch@irif.fr>
To: Juliusz Chroboczek <jch@irif.fr>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/homenet/xXmfsn9Qi2CFCIXpaLFpPFNSJlo>
Subject: Re: [homenet] DNCP/HNCP Revisited
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This still doesn’t address the problem that the HNCP packet needs to be fragmented. Fragmented Multicast doesn’t scale well. 

> On Sep 18, 2019, at 19:09, Juliusz Chroboczek <jch@irif.fr> wrote:
> 
> 
>> 
>> If you have a discontinuous L2 MTU, you do not need fragmented packets
>> to see packets disappear.
> 
> Ah, I see.
> 
>> No fragmentation of any sort involved, just incorrectly set up L2 segments.
> 
> Right.  It's an incorrect network setup.
> 
> To fix that, it should be enough to point the tunnel directly at a Homenet
> router rather than relying on bridging.  (A good idea in any case, since
> Babel is able to make better routing decisions if the tunnel is directly
> visible to it.)
> 
> -- Juliusz
> 
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