100 mb/s problem- Slow One Way

From: Aaron Flin <af_at_dogpile.com>
Date: Thu, 25 Jun 1998 07:54:50 -0700

Dear Managers,

I have a 164lx motherboard 533 mhz chip and DU4.0b with 2 Genuine DEC tulip
ethernet cards.

The tu0 is currently the only one being used. It is hooked into a 100 mb/s
hub which is in turn hooked into a switch. It is on a network of
Intel/Linux boxes which all have clone tulip cards (Netgear FA310tx).
Communication between the linux boxes occur as expected as does data going
out of the alpha. However data coming into the Alpha is extremely slow
(whether nfs or ftp).

Here is an example of speeds with ftp client run on the Alpha:

ftp> get testfile
200 PORT command successful.
150 Opening BINARY mode data connection for testfile (19908479 bytes).
226 Transfer complete.
19908479 bytes received in 1.1e+02 seconds (1.8e+02 Kbytes/s)
ftp> put testfile
200 PORT command successful.
150 Opening BINARY mode data connection for testfile.
226 Transfer complete.
19908479 bytes sent in 3.7 seconds (5.3e+03 Kbytes/s)

Here's some relevant info:

        arfie 07:45:26 /tmp# netstat -r
        Routing tables
        Destination Gateway Flags Refs Use Interface
        Netmasks:
        Inet 255.0.0.0
        Inet 255.255.255.0

        Route Tree for Protocol Family 2:
        default gate-101b.sjc.abov UG 5 3108076 tu0
        10 alpha U 1 74 tu1
        localhost localhost UH 1 0 lo0
        207.126.101 arfie U 9 24931425 tu0
        arfie 07:45:30 /tmp# ifconfig -a
        tu0: flags=c63<UP,BROADCAST,NOTRAILERS,RUNNING,MULTICAST,SIMPLEX>
              inet 207.126.101.200 netmask ffffff00 broadcast 207.126.101.255
ipmtu 1500

        tu1: flags=c63<UP,BROADCAST,NOTRAILERS,RUNNING,MULTICAST,SIMPLEX>
             inet 10.0.0.5 netmask ff000000 broadcast 10.255.255.255 ipmtu 1500

                sl0: flags=10<POINTOPOINT>

        lo0: flags=c89<UP,LOOPBACK,NOARP,MULTICAST,SIMPLEX>
             inet 127.0.0.1 netmask ff000000 ipmtu 1536

        ppp0: flags=10<POINTOPOINT>

tu0 is also aliased with two additional ip addresses.

Any ideas?


Thanks in advance.

Aaron Flin
http://www.dogpile.com/
   Watch us GROW on http://www.100hot.com/home.chtml
Received on Thu Jun 25 1998 - 16:56:21 NZST

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