[U-Boot-Users] lan91c111 bad len

[himbA]

hi

after upgrading my toolchain and u-boot sources to CVS 1.0.2 version I 
still can't manage to get 'clean & fast' downloads of kernel image from 
tftp server, though sometimes I do.
I'm using lan91c111 ether driver and following occours (compiled with 
either gcc-2.95.3 or gcc-3.2 toolchain)
uboot> boot
BOOTP broadcast 1
got BOOTP packet (src=67, dst=68, len=300 want_len=300)
Filtering pkt = 0
Bootfile: kernel.img
Got good BOOTP
TFTP from server 10.10.10.1; our IP address is 10.10.10.2
Filename 'kernel.img'.
Load address: 0xa0100000
Loading: ####len bad 48 < 544
len bad 48 < 544
#len bad 48 < 544
#len bad 48 < 544
##len bad 48 < 544
#len bad 48 < 544
[...]
#len bad 48 < 544
##len bad 48 < 544
len bad 212 < 544
T T T T T T T T T T
Retry count exceeded; starting again
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
BOOTP broadcast 4
BOOTP broadcast 5
[...]

after len bad is reported transmission stalls for a while then 
continues. I also noticed that sometimes it copies kernel with only few 
len bad notices sometimes it timeouts. During stalls arp requests are sent:
arp who-has 10.10.10.2 tell 10.10.10.1
14:12:00.735751 arp reply 10.10.10.2 is-at 0:c4:e:43:36:68

timeouts occour at the end of transmission and tcpdump reports
14:14:06.131236 arp who-has 10.10.10.2 tell 10.10.10.1
14:14:08.120463 arp who-has 10.10.10.2 tell 10.10.10.1
14:14:10.109675 arp who-has 10.10.10.2 tell 10.10.10.1
14:14:10.167694 10.10.10.1.32771 > 10.10.10.2.1644: udp 516 (DF)
14:14:20.164829 arp who-has 10.10.10.2 tell 10.10.10.1
14:14:22.154086 arp who-has 10.10.10.2 tell 10.10.10.1
[...]

no reply from lan91c111 ?

Anybody had similar issues ?
Where should I start debugging ? - ether driver smc91111.c seems like a 
good start.
What else am I looking for ?

regards, himba