Date: Fri, 20 Jul 2007 07:51:59 -0500 From: Mike Karels <karels@karels.net> To: Julian Elischer <julian@elischer.org> Cc: Tom Judge <tom@tomjudge.com>, freebsd-net@freebsd.org Subject: Re: 6.2 mtu now limits size of incomming packet Message-ID: <200707201252.l6KCpx7G033770@redrock.karels.net> In-Reply-To: Your message of Wed, 18 Jul 2007 20:46:47 -0700. <469EDEA7.9000606@elischer.org>
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> Mike Karels wrote: > >> There are also things to consider such as if a GigE card is connected to > >> a GigE device (switch/card etc) and the card supports jumbo frames > >> should the MRU be set to the max jumbo receive size for the card? This > >> could cause confusion when people plug jumbo capable devices in with > >> hardware limitations making the MRU lower than other devices on the network. > > > > Although we don't have an MRU explicitly, we don't enable reception > > of jumbo frames without administrator action. There is an IFCAP_JUMBO_MTU > > flag defined, but not previously used as far as I know. We added the > > ability to set that flag with ifconfig, which enables reception of > > jumbo frames without changing the MTU. Then, in ether_input, we accept > > any packet that a NIC sees fit to receive. > for what values of "we"? Sorry, that's Secure Computing. I was elaborating on a change I had mentioned earlier. Mike
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