Ah, finally someone else sees what I ran into last year.  Look for my
posting to -current in May 2001, subject "dc0 ARP problem with CISCO".

At that time, the only advice I got was to hardwire speed detection 
(which didn't help). My solution then was to switch hardware :-(
So I'm afraid this is of no help to you, except for the "mee too"


Am Mi, 2002-03-27 um 21.47 schrieb Gavin Atkinson:
> [...snip...]
> It's starting to look promising. I even get a (red) link light on the
> card, and once an IP is configured, ifconfig can tell if the link exists
> or not, though cannot establish what the speed of it is (this is into a
> 100M switch).  However, I still have almost no network connectivity with
> it.  An outbound ping loses 100% of packets, and hosts trying to ping it
> cannot arp it's MAC address. However, once I have forced an entry into the
> arp table of the second host, I can ping the Xircom card, albeit very
> slowly (snipped down for clarity):
> PING epsilon.ury.york.ac.uk ( 56 data bytes
> 64 bytes from icmp_seq=211 ttl=64 time=2020.368 ms
> 64 bytes from icmp_seq=216 ttl=64 time=3030.348 ms
> 64 bytes from icmp_seq=217 ttl=64 time=2020.406 ms
> 64 bytes from icmp_seq=223 ttl=64 time=2020.374 ms
> 64 bytes from icmp_seq=229 ttl=64 time=2020.374 ms
> 64 bytes from icmp_seq=253 ttl=64 time=7070.335 ms
> 64 bytes from icmp_seq=255 ttl=64 time=5050.412 ms
> 64 bytes from icmp_seq=286 ttl=64 time=6060.318 ms
> 64 bytes from icmp_seq=287 ttl=64 time=5050.348 ms
> 64 bytes from icmp_seq=288 ttl=64 time=4040.382 ms
> --- epsilon.ury.york.ac.uk ping statistics ---
> 311 packets transmitted, 139 packets received, 55% packet loss
> round-trip min/avg/max/stddev = 614.382/5760.691/9090.237/2161.803 ms
> Note the large mean time, and the fact that I consistantly lose 55% of
> packets. Watching the link light, the card seems to receive the packets
> instantly, buffer three or four, then lose the link. WHen the link comes
> back, the replies to these packets all get sent back at once.
> I'm now at a loss as to where to go. I have no idea how to progress with
> this, as i'm not a kernel hacker. Has anyone seen this before? If it
> helps, I am using revision 3 of the card (read using
> pci_read_config(dev, DC_PCI_CFRV, 4) & 0xff), and it's on a Toshiba ToPIC
> 95B cardbus bridge.
> If anyone can help, i'd be most greatful...
> Thanks,
> Gavin
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