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Re: IPv6 path MTU discovery not working (large number of retransmited TCP data packets)

To: Christof Meerwald <cmeerw%cmeerw.org@localhost>, tech-net%netbsd.org@localhost
Subject: Re: IPv6 path MTU discovery not working (large number of retransmited TCP data packets)
From: Jörg Sonnenberger <joerg%bec.de@localhost>
Date: Mon, 26 May 2025 21:15:17 +0200

On 5/26/25 6:41 PM, Christof Meerwald wrote:

The NetBSD VPS is using vioif0 with MTU 1500, but I am actually
connecting to the IPv6 address via an HE tunnel (so the MTU on the
path is lower).

Is your default route using the public address also used in the ICMP6error or a link local address of the same suffix?


Joerg

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