kern/78791: xl input errors and speed problem

[Nicolas DEFFAYET]

>Number:         78791
>Category:       kern
>Synopsis:       xl input errors and speed problem
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Mar 13 15:20:02 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Nicolas DEFFAYET
>Release:        5.3-RELEASE-p5
>Organization:
>Environment:
FreeBSD router 5.3-RELEASE-p5 FreeBSD 5.3-RELEASE-p5 #0: Thu Feb  3 18:12:27 CET 2005     nicolas at router:/usr/src/sys/i386/compile/20050203-fb53  i386
>Description:
The machine is a router with 3 network card 3COM 3C905B. Many configuration settings have been tested without success (router interface and switch configured with autonegocation or with 100-full).
The cable is good, have been changed and tested with Waveteak tool.

The speed is very slow:

$ wget ftp://ftp.oleane.net/pub/debian-cd/images/3.0_r4/i386/debian-30r4-i386-binary-1.iso
--15:57:48--  ftp://ftp.oleane.net/pub/debian-cd/images/3.0_r4/i386/debian-30r4-i386-binary-1.iso
           => `debian-30r4-i386-binary-1.iso'
Resolving ftp.oleane.net... done.
Connecting to ftp.oleane.net[194.2.0.36]:21... connected.
Logging in as anonymous ... Logged in!
==> SYST ... done.    ==> PWD ... done.
==> TYPE I ... done.  ==> CWD /pub/debian-cd/images/3.0_r4/i386 ... done.
==> PASV ... done.    ==> RETR debian-30r4-i386-binary-1.iso ... done.
Length: 600,158,208 (unauthoritative)

 0% [                                                                                                                 ] 3,844,392     32.76K/s  ETA 4:56:14

and there is a lot of input errors:

$ netstat -I xl0
Name    Mtu Network       Address              Ipkts Ierrs    Opkts Oerrs  Coll
xl0    1500 <Link#3>      00:04:75:d9:71:ab 296231311 245239 271395708    12     0
xl0    1500 fe80:3::204:7 fe80:3::204:75ff:        0     -        4     -     -

All tests have been done on the router. It's not a problem of slow upstream, the router is connected on a 100Mbps/s dedicated link and it's work fine with Netgear GA620 network card.
>How-To-Repeat:
Install a 3COM 3C905B and download a file from a FTP server.
You will get a lot of input errors and the download will be very slow.
>Fix:
      
>Release-Note:
>Audit-Trail:
>Unformatted: