Tuning: 100mbit faster, gbit slower.

[Daniel Andersson]

Thanks for the reply! Maybe I should have been more clear.
My setup looks like this:
internet - em1(server box) em0 - windoze desktop.

The internet(em1) 100mbit seems to do fine, even better than
before, I get about 11mb/s with rtorrent(uploading). It's the
internal gbit connection that's weird with ftp. It not as fast nor
as smooth as it was before I did the "tuning". I doesn't have
any trouble running ftping at 30mb/s after the tuning so it is
definately capabel of delivering 100mbit?

$ifconfig -a
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=9b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM>
        ether 00:1b:21:0a:1d:87
        inet 192.168.0.10 netmask 0xffffff00 broadcast 192.168.0.255
        media: Ethernet autoselect (1000baseTX <full-duplex>)
        status: active
em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=9b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM>
        ether 00:1b:21:0c:d1:b3
        inet external.ip.goes.here netmask 0xfffffc00 broadcast
xx.xxx.147.255
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
plip0: flags=108810<POINTOPOINT,SIMPLEX,MULTICAST,NEEDSGIANT> metric 0 mtu
1500
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x4
        inet6 ::1 prefixlen 128
        inet 127.0.0.1 netmask 0xff000000
pflog0: flags=141<UP,RUNNING,PROMISC> metric 0 mtu 33204

tcpdump as requested:
engy# tcpdump -vv -i em0 portrange 40000-42000 or portrange 20-21 |
cat > /usr/home/engy/tcpdump

http://pastebin.org/25081

If you had something else in mind, let me know. When I transferred large
files I sometimes got about 600 packages dropped by kernel. That
can't be good. Also it seemed that I got a lot of ack packages, don't
know if that's normal.

Cheers,
Daniel


>The stock settings are more than enough to saturate 100TX with even
> relatively
> >ancient hardware.  And by ancient I mean Pentium 2 class machines.
> >
> >The biggest tuning you can do is use intel (fxp) or 3com (xl) NICS and a
> >halfway decent switch.
> >
> >If your server box can't saturate 100TX ethernet with the defaults then
> >something is amiss.  Perhaps provide a dmesg from the server and a client
> and
> >a tcpdump from an FTP session between them?
> >
> >--
> >Thanks,
> >
> >Josh Paetzel
>
> >PGP: 8A48 EF36 5E9F 4EDA 5A8C 11B4 26F9 01F1 27AF AECB
>
>