Subject: Re: bge(4) tcp4csum problem -- driver problem or chip problem???
To: Ignatios Souvatzis <is@NetBSD.org>
From: Brian Buhrow <firstname.lastname@example.org>
Date: 12/18/2006 08:56:17
Well, I'm not sure. Does the netstat -s output count packets which
are discarded for tcp checksum errors even when they are being transmitted
from the local box? I think it might be transmission, since my test tcp
traces show us not answering to obvious retransmissions. Howevr, the the
counter for tcp checksum discards in netstat -s output increments very
steadily as well, leading to my confusion.
Are you suggesting that I might need the tx short work around your
On Dec 18, 4:24pm, Ignatios Souvatzis wrote:
} Subject: Re: bge(4) tcp4csum problem -- driver problem or chip problem???
} On Thu, Dec 07, 2006 at 11:40:10AM -0800, Brian Buhrow wrote:
} > Hello. I have a series of Sun V20Z servers with the following
} > Broadcom chips on them, as reported by the bge(4) driver.
} > bge0 at pci2 dev 2 function 0: Broadcom BCM5703X Gigabit Ethernet
} > bge0: interrupting at irq 5
} > bge0: ASIC BCM5703 A2 (0x1002), Ethernet address 00:09:3d:00:18:26
} > brgphy0 at bge0 phy 1: BCM5703 1000BASE-T media interface, rev. 2
} bge0 at pci1 dev 0 function 0: Broadcom BCM5751M Gigabit Ethernet
} bge0: interrupting at irq 11
} bge0: pcie mode=0x105000
} bge0: ASIC BCM5751 A1 (0x4101), Ethernet address 00:16:d3:29:d0:41
} bge0: setting short Tx thresholds
} brgphy0 at bge0 phy 1: BCM5750 1000BASE-T media interface, rev. 0
} > With hardware tcp4 checksumming enabled, I see a large number of tcp
} > packets discarded for checksum errors.
} NetBSD 4 BETA2, I don't see any errors, I think. Is this on transmission
} (on the peer) or on reception?
>-- End of excerpt from Ignatios Souvatzis