Date: Tue, 7 Jan 2014 16:34:46 -0500 From: Garrett Wollman <wollman@bimajority.org> To: freebsd-net@freebsd.org Subject: ETHER_MAX_LEN_JUMBO Message-ID: <21196.29430.733181.353677@hergotha.csail.mit.edu>
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In <net/ethernet.h>, the constant ETHER_MAX_LEN_JUMBO is set to 9018. According to svn, this was added by sam back in 2002, and now seems a bit low. Our maximum MTU at work has always been 9120 (implying 9138 for ETHER_MAX_LEN_JUMBO), and we have hardware in production now that defaults to 12000. The ixgbe driver doesn't use this constant, bu the cxgbe driver does. Does anyone know a reason I should *not* increase it to a more reasonable level? (9216 would be my choice if we wanted to stick with values in the 9k range.) -GAWollman
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