Hi Vincent,
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.
Regards,
Günti
> -Original Message-
> From: swinog-boun...@lists.swinog.ch [mailto:swinog-
> boun...@lists.swinog.ch] On Behalf Of Vincent Bernat
> Sent: Sunday, November 09, 2014 12:33 PM
> To: swinog@lists.swinog.ch
> Subject: [swinog] Swisscom 6RD and MTU
>
> Hi!
>
> 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: G... Kernel memory corrupted ... going on, but
> it'll crash very soon :-(\n");
> 2.4.3 linux/fs/hpfs/super.c
>
>
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