why is IP_MAX_MTU limited to 65520 bytes

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* why is IP_MAX_MTU limited to 65520 bytes
@ 2009-08-25 23:25 Sridhar Samudrala
  2009-08-25 23:30 ` David Miller
  0 siblings, 1 reply; 2+ messages in thread
From: Sridhar Samudrala @ 2009-08-25 23:25 UTC (permalink / raw)
  To: netdev

Any reason why the maximum IP payload is limited to IP_MAX_MTU(0xFFF0) bytes
instead of the maximum possible value of 0xFFFF

Thanks
Sridhar


^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: why is IP_MAX_MTU limited to 65520 bytes
  2009-08-25 23:25 why is IP_MAX_MTU limited to 65520 bytes Sridhar Samudrala
@ 2009-08-25 23:30 ` David Miller
  0 siblings, 0 replies; 2+ messages in thread
From: David Miller @ 2009-08-25 23:30 UTC (permalink / raw)
  To: sri; +Cc: netdev

From: Sridhar Samudrala <sri@us.ibm.com>
Date: Tue, 25 Aug 2009 16:25:40 -0700

> Any reason why the maximum IP payload is limited to IP_MAX_MTU(0xFFF0) bytes
> instead of the maximum possible value of 0xFFFF

0xffff is an odd value, IP fragments must be a multiple of
8 bytes, etc. etc.

^ permalink raw reply	[flat|nested] 2+ messages in thread

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2009-08-25 23:25 why is IP_MAX_MTU limited to 65520 bytes Sridhar Samudrala
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