Trouble with Cisco Airo MPI350 and kernel-2.6.1+
Fabrice Bellet
fabrice at bellet.info
Mon Feb 2 15:22:34 UTC 2004
Hi,
On Sun, Feb 01, 2004 at 11:30:00AM -1000, Warren Togami wrote:
> >>On Sun, Jan 25, 2004 at 07:48:57PM -1000, Warren Togami wrote:
> >>
> >>>IBM Thinkpad T41
> >>>Cisco Airo MPI350 802.11b Wireless
> >>>PCIID: 0x14b9 0xa504
> >>>Kernel: Fedora rawhide 2.6.1-1.57 (Based on 2.6.2-rc1)
> >>>
> >>>http://bellet.info/~bellet/laptop/t40.html#wireless
> >>>http://bellet.info/~bellet/laptop/airo.c-2.6.1-mm2.diff
> >>>airo.ko does not support this Airo device, but with the addition of
> >>>this patch it recognizes the device.
> >>
> >>
> >>
> >[SNIP]
> >Used the ACU tool under Windows XP for flashing the firmware. The
> >newest firmware version that operates with your driver is:
> >5.00.03
> >
> >Perhaps mention within a comment and/or config Help of your patch that
> >the newest supported firmware is 5.00.03? That would save people like
> >me a lot of time in the future...
> >
>
> Are these many errors normal?
>
[snip]
>
> [root at ibmlaptop etc]# ifconfig eth1
> eth1 Link encap:Ethernet HWaddr 00:02:8A:DF:50:FC
> inet addr:192.168.1.103 Bcast:192.168.1.255 Mask:255.255.255.0
> inet6 addr: fe80::202:8aff:fedf:50fc/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:905 errors:655 dropped:0 overruns:0 frame:655
> TX packets:699 errors:33 dropped:0 overruns:0 carrier:0
> collisions:30 txqueuelen:1000
> RX bytes:439321 (429.0 Kb) TX bytes:118979 (116.1 Kb)
> Interrupt:11 Base address:0x8000
The "rx errors" value is generated by summing 4 error counters from the
card internal stats structure in airo_read_stats() :
RxOverrun, RxPlcpFormatErr, RxPlcpLengthErr and RxMacCrcErr.
Altough my connection is up and running, I also observe a high rate of
RxMacCrcErr errors :
% grep MacCrc /proc/driver/aironet/eth1/Stats
RxMacCrcErr: 7688
RxMacCrcOk: 11399
I think that these errors are probably just related to the quality of the
radio link, and do not reflect something bad, that would occur in the
driver itself.
Best wishes,
--
fabrice
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