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MPC860T(Viper) 100Base/T Ethernet problem


hi.
I ported mpc860t viper ecos package on my custom mpc860t board.
porting was ok, but it seems that ethernet using fec does not work well.
when i tested ping_test program , message output was like below.

PING server 210.122.158.126
recvfrom: Operation timed out
recvfrom: Operation timed out
64 bytes from 210.122.158.126: icmp_seq=2, time=0ms
recvfrom: Operation timed out
recvfrom: Operation timed out
64 bytes from 210.122.158.126: icmp_seq=5, time=0ms
310 bytes from 210.122.158.126: icmp_seq=6, time=320ms
310 bytes from 210.122.158.126: icmp_seq=3, time=2360ms
64 bytes from 210.122.158.126: icmp_seq=4, time=1360ms
1048 bytes from 210.122.158.126: icmp_seq=9, time=560ms
1294 bytes from 210.122.158.126: icmp_seq=10, time=270ms
556 bytes from 210.122.158.126: icmp_seq=7, time=870ms
802 bytes from 210.122.158.126: icmp_seq=8, time=870ms
1786 bytes from 210.122.158.126: icmp_seq=12, time=10ms
1540 bytes from 210.122.158.126: icmp_seq=11, time=30ms
2278 bytes from 210.122.158.126: icmp_seq=14, time=10ms
Sent 16 packets, received 12 OK, 0 bad
PASS:<Ping test OK>
EXIT:<done>

i guess both message loss and delay happen.
so what do you think is problem on this.

thanks in advance.

Tony 


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