Date: Fri, 19 Dec 2008 09:06:07 -0800 (PST) From: Karrj <John.Karr@bt.com> To: freebsd-questions@freebsd.org Subject: Netstat command output Message-ID: <21094731.post@talk.nabble.com>
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Hello - Warning - I am new to FreeBSD. I am not sure this is the correct forum for this post - forgive me if it is not and please direct me to the correct area. I have installed FreeBSD on a HP Proliant DL380 G3 server with (2) NICs. I have also installed Dummynet and NetSNMP as my ultimate goal is to use this as a WAN emulator. I was doing some initial testing where the FreeBSD box acts as a router between two subnets where an ftp client is on one subnet and an ftp server is on the other. I kick off an ftp get of a 9 MB file and at the same time initiate a netstat -w1 -Ibge0 command on the FreeBSD. The outputput of the command indicates a relatively small number of input errors (<10 per interval). The same command on the bge1 interface is all zeros. This is repeatable every time I perform the ftp get. I performed the same test without the FreeBSD box by having the client and server connected to the same subnet through the same switch ports and no errors according to the trace analysis - no retransmissions, etc shown in the trace. My questions are related to the meaning and interpretation of the output of the netstat command and how to resolve the errors. 1) What is the meaning of input errors? Is it bad CRC at layer 2? What would be meant by output errors in the command? The interface cannot see the packets after they have been transmitted. I would like a technical explanation of the output of this netstat command. 2) How to alleviate the errors? Is this a buffer issue? How to determine the NIC type? Any feedback would be most appreciated. -- View this message in context: http://www.nabble.com/Netstat-command-output-tp21094731p21094731.html Sent from the freebsd-questions mailing list archive at Nabble.com.
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