I've asked our 6rd Guru.
This is related to our PPPoE-customers. Their MTU is reduced by another 8 Bytes because of
the PPPoE header.
I hope this helps to clear the confusion.
From: swinog-bounces(a)lists.swinog.ch [mailto:swinog-
bounces(a)lists.swinog.ch] On Behalf Of Vincent Bernat
Sent: Sunday, November 09, 2014 12:33 PM
Subject: [swinog] Swisscom 6RD and MTU
At home, I have replaced Swisscom internet box by my own (Linux)
router. For IPv6, I noticed that the MTU is 1472 instead of 1480 (1500
- 20). For IPv4, MTU is 1500.
Does anyone know why the MTU on those 6RD links has to be 1472 and not
1480? Have other people with the same setup noticed that too?
printk("HPFS: Grrrr... Kernel memory corrupted ... going on, but
it'll crash very soon :-(\n");
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