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?
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-bounces@lists.swinog.ch [mailto:swinog- bounces@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: Grrrr... Kernel memory corrupted ... going on, but it'll crash very soon :-(\n"); 2.4.3 linux/fs/hpfs/super.c
swinog mailing list swinog@lists.swinog.ch http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
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Robert.Guentensperger＠swisscom.com -
Vincent Bernat