Re: lan bandwidth issue

FreeBSD-Lis Sun, 09 Nov 2003 09:02:30 -0800

I think we have the same issue....

Working on this problem for months now and I can't find the problem. I also used the FreeBSD as a NATd server for my ADSL(tun0) connection. I have some other server demons running, but switching them off gives no positive effect on the upload speed (average it's 10 times slower than upload). When I disconnect the Internet the problem isn't solved, so it's not a lookup loop. Problem is not solved by setting all NIC's to 10 of half duplex.

This problem accurse with NFS, Samba and FTP so it's not a configuration of these demons.

Please replace the Reltek card, because a realtek chip-set based NIC will over preform on a FreeBSD box, courses connection losses and wrong auto media detections. However I have exactly the same problem using a 3Com for my LAN connection:

# ifconfig xl0
xl0: flags=8843<UP‚BROADCAST‚RUNNING‚SIMPLEX‚MULTICAST> mtu 1500
        options=3<RXCSUM‚TXCSUM>
        inet 192.168.0.1 netmask 0xffffff00 broadcast 192.168.0.255
        ether 00:04:75:98:d6:bd
        media: Ethernet 100baseTX <full-duplex>
        status: active

Have tested my HDD speed but this is good (12MB/Sec read and 9MB/Sec write, random). This is genarated with tcpdump during a heavy upload (500MB), I don't have a clue what it means but maybe somebody can have a look at this.

# tcpdump xl0 10:38:10.760321 server.zaleo.homeunix.net.netbios-ssn > zeo.1029: . ack 3156635 win 65535 (DF) 10:38:10.760751 zeo.1029 > server.zaleo.homeunix.net.netbios-ssn: . 3158095:3159555(1460) ack 6883 win 63781NBT Packet (DF)

More information about my system is found on Http://info.zaleo.homeunix.net (PhpSysInfo) As you can see a lot of "err" on this device only when I upload to the FreeBSD-Box, strangely there are no collisions on the network and I have tried a direct twisted pair connection.

If you need more specific information please let me know, we are really desperate to solve this problem.

At 21:13 4-11-2003, silent slim wrote:

This has gotta be a software issue... it seems logically impossible for
it to be otherwise.  I have my windows box running off a nat on my fbsd
box, it transmits to my isp at a max of about 160k down 70k up.
Transfering files between the two boxes can be done at a max of 1.6M down
and 130k up. Hense its physcially impossible for it to be a hardware
problem.  This is all quite annoying as both boxes are connected by
http://www.startech.com/ststore/itemdetail.cfm?tab=b&ProductID=ST100S&topbar=topbara.htm
10/100 nics and a 50' crossover cable.  Anyone have any ideas on what is
causing this issue and how it could possibly be resolved?

Here is the output from ifconfig on the bsd box:
rl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
       inet 192.168.0.1 netmask 0xffffff00 broadcast 192.168.0.255
       inet6 fe80::250:fcff:fe71:a11b%rl0 prefixlen 64 scopeid 0x1
       ether 00:50:fc:71:a1:1b
       media: Ethernet 100baseTX <full-duplex>
       status: active
rl1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
       inet6 fe80::250:bfff:fe17:63a2%rl1 prefixlen 64 scopeid 0x2
       inet 142.59.160.131 netmask 0xfffff800 broadcast 142.59.167.255
       ether 00:50:bf:17:63:a2
       media: Ethernet autoselect (10baseT/UTP)
       status: active
lp0: flags=8810<POINTOPOINT,SIMPLEX,MULTICAST> mtu 1500
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
       inet6 ::1 prefixlen 128
       inet6 fe80::1%lo0 prefixlen 64 scopeid 0x4
       inet 127.0.0.1 netmask 0xff000000
ppp0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500
sl0: flags=c010<POINTOPOINT,LINK2,MULTICAST> mtu 552
faith0: flags=8002<BROADCAST,MULTICAST> mtu 1500

And here is the output from ipconfig /all on the the win box:
Windows IP Configuration

       Host Name . . . . . . . . . . . . : FAMILY
       Primary Dns Suffix  . . . . . . . :
       Node Type . . . . . . . . . . . . : Unknown
       IP Routing Enabled. . . . . . . . : No
       WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Realtek RTL8139 Family PCI Fast Ethernet NIC Physical Address. . . . . . . . . : 00-50-FC-71-A1-31 Dhcp Enabled. . . . . . . . . . . : No IP Address. . . . . . . . . . . . : 192.168.0.2 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.0.1 DNS Servers . . . . . . . . . . . : 209.115.131.51 209.115.152.150 216.123.198.243 209.115.152.130

Thanks,
ryan

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-- Zeo Smeijsters http://www.zaleo.homeunix.net/ http://www.zaleo.nl.


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Re: lan bandwidth issue

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