From: Miller, Shao
Sent: Thursday, November 11, 2010 12:29
To: ''
Subject: RE: TCP Network Broken from Host to coLinux Broadcom WinPcap

Hello all,

Just for the record, I have a Broadcom NetLink Gigabit Ethernet NIC with PCI IDs V14E4 (Broadcom, obviously), D1693.  My Windows XP driver is b57xp32.sys.

I had encountered an issue where I could ping and perform any sort of UDP to my hosted coLinux, but TCP wasn’t working.  My coLinux’ service had parameters something like:

(Solution omitted from previous e-mail)

Just reporting that I can reproduce the problem (and solution) on a Marvell Yukon 88E8053 PCI-E Gigabit Ethernet Controller (VENdor 11AB, DEVice 4362), which is the wired NIC on some Apple MacBook computers.  For this NIC, the setting was called TCP/UDP Checksum Offload (IPv4) and one can reproduce the issue with the On setting.

Have a nice day.

- Shao Miller