Odd performance with FreeBSD 4.10 and Compaq 317453-001 dual
J. Seth Henry
jshamlet at comcast.net
Thu Aug 26 11:18:58 PDT 2004
I recently decided to swap out the 3Com 3C905-TXM board in my router for a
dual port Compaq NC3122 (317453-001) dual port NIC so I could avoid using the
built-in NIC (the Intel ICH2 integrated fxp device) Ironically, I was told
that this board would perform well for this application.
The board has a Intel/DEC 21152 PCI bridge, and two Intel S82558B ethernet
controllers - all of which are found and initialized. The board shows up as
fxp0 and fxp1 under pcib1. Both ports indicate a link to the switch, and show
The problem is that performance for both ports is, shall we say, extremely
lacking. I will see normal performance for a few seconds, then the board will
"disappear" for several seconds, then "reappear". In some cases, the board
will quit responding so long that services will time out. When I ssh into the
router through one of the ports on this board, I can see the remote end stop
responding to my typing in mid-stream.
Other than the fact that remote hosts are having a devil of a time talking to
the router when this board is used, there is nothing in the logs to indicate
trouble, and the machine is stable. The original NIC works fine - and I use
it to log in and halt the box when I am testing.
Is this just a bad board, or is something else going on? If anything, I would
suspect the bridge chip, as both ports exhibit this behavior.
- Seth Henry
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