From: Rick Jones <rick.jones2@hp.com>
To: Patrick McHardy <kaber@trash.net>
Cc: Stephen Hemminger <shemminger@vyatta.com>,
"David S. Miller" <davem@davemloft.net>,
netdev@vger.kernel.org
Subject: Re: [PATCH] vlan: propogate MTU changes
Date: Mon, 06 Oct 2008 16:18:36 -0700 [thread overview]
Message-ID: <48EA9CCC.2050505@hp.com> (raw)
In-Reply-To: <48EA98F0.40302@trash.net>
Patrick McHardy wrote:
> Rick Jones wrote:
>
>> Patrick McHardy wrote:
>>
>>> Agreed. But the question when to do automatic adjustments remains.
>>
>>
>> A matter of interpretation of the principle of least surprise right?
>> Which is less surprising - that a VLAN's MTU drops to match that of
>> the physical interface or that some traffic on the VLAN stops when the
>> physical interface's MTU drops?
>
>
> The traffic actually shouldn't stop since the MTU isn't enforced by
> the lower layers and also usually not by the driver. So I feel unable
> to make a policy decision when both views don't seem unreasonable.
> Especially given the fact that the "more suprising" behaviour so far
> has been our default.
Does changing the MTU on a physical interface not change the size frame
the NIC itself will be willing to accept?
rick jones
next prev parent reply other threads:[~2008-10-06 23:19 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-06 15:30 [PATCH] vlan: propogate MTU changes Stephen Hemminger
2008-10-06 16:02 ` Patrick McHardy
2008-10-06 17:54 ` Stephen Hemminger
2008-10-06 18:25 ` [PATCH] vlan: propogate MTU changes (v2) Stephen Hemminger
2008-10-06 18:45 ` Duyck, Alexander H
2008-10-06 19:20 ` Ben Hutchings
2008-10-06 22:53 ` Patrick McHardy
2008-10-06 22:33 ` [PATCH] vlan: propogate MTU changes Patrick McHardy
2008-10-06 22:50 ` Rick Jones
2008-10-06 23:02 ` Patrick McHardy
2008-10-06 23:04 ` Patrick McHardy
2008-10-06 23:18 ` Rick Jones [this message]
2008-10-06 23:33 ` Patrick McHardy
2008-10-07 23:05 ` David Miller
2008-10-08 11:53 ` Patrick McHardy
2008-10-06 20:14 ` Krzysztof Oledzki
2008-10-06 22:38 ` Patrick McHardy
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