Date: Mon, 13 May 2002 10:21:16 -0700 From: Terry Lambert <tlambert2@mindspring.com> To: jamie@tridentmicrosystems.co.uk Cc: freebsd-hackers@freebsd.org Subject: Re: Broadcom BCM5701 Chipset problems Message-ID: <3CDFF60C.48A2EA65@mindspring.com> References: <20020513115600.A50967@mufuf.trident-uk.co.uk>
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Jamie Heckford wrote: > I read in the mailling lists mentions of hardware checksum problems > with the chipset.. did anyone know what the final outcome with > this problem was and if any changes had been MFC'd? The problems were only when coupled with VLAN tagging. I'm not sure if the 5701 was succeptible to the problem, or not. The patches disabled hardware checksumming. To fix the problem on the card would require changes to the card firmware, at least (hardware assisted checksum, subtracting out the VLAN encapsulation incrementally; assumes that hardware can run a partial checksum, and it's not tied to the buffer shift registers directly). If you aren't using VLAN tagging, you shouldn't care. -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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