Main Site Documentation

FEZ Cobra Ethernet Speeds


#1

I am just doing a standard ping to the FEZ Cobra Ethernet and I notice that the speed is reduced signicantly. I also tested a Luminary Eval board I am using for similar project to see which has better performance.

They are both hooked to the same router and the same computer is pinging them. I am wondering is there a setting I am missing or something to increase the Ethernet speed on the FEZ Cobra?

** Luminary Micro Eval Board Ping Test **
C:>ping 192.168.1.22

Pinging 192.168.1.22 with 32 bytes of data:

Reply from 192.168.1.22: bytes=32 time<1ms TTL=128
Reply from 192.168.1.22: bytes=32 time<1ms TTL=128
Reply from 192.168.1.22: bytes=32 time<1ms TTL=128
Reply from 192.168.1.22: bytes=32 time<1ms TTL=128

Ping statistics for 192.168.1.22:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

** FEZ Cobra Ping Test **
C:>ping 192.168.111.130

Pinging 192.168.111.130 with 32 bytes of data:

Reply from 192.168.111.130: bytes=32 time=3ms TTL=60
Reply from 192.168.111.130: bytes=32 time<1ms TTL=60
Reply from 192.168.111.130: bytes=32 time<1ms TTL=60
Reply from 192.168.111.130: bytes=32 time<1ms TTL=60

Ping statistics for 192.168.111.130:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 3ms, Average = 0ms


#2

where is the speed test? I am not sure I understand, sorry


#3

Looks like the first icmp message to the cobra took 3ms instead of <1ms.

The longer time on the first icmp message could be explained by arp. The mac address for the other board was already cached.

But… where is the speed test?


#4

Yes that 3ms is a bad way to determine Ethernet speed. I can tell you this, you can download a file from HTTP browser at about 150KBytes/sec on Cobra


#5

Yeah the speed is pretty good on the Cobra, I send system updates and application installs to it via internet all the time and I’ve got zero complaints.