Date: Wed, 18 Jul 2007 20:30:41 -0500 From: Mike Karels <karels@karels.net> To: Tom Judge <tom@tomjudge.com> Cc: freebsd-net@freebsd.org Subject: Re: 6.2 mtu now limits size of incomming packet Message-ID: <200707190130.l6J1UfS4027169@redrock.karels.net> In-Reply-To: Your message of Wed, 18 Jul 2007 23:04:15 %2B0100. <469E8E5F.9000707@tomjudge.com>
next in thread | previous in thread | raw e-mail | index | archive | help
> 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. Mike
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200707190130.l6J1UfS4027169>