Ethernet packet..

[Moti Cohen]

Hy guys, I'm currently working on a 10/100 ETHERNET mac implementation
in an FPGA (using vhdl). in order to simulate my state machine I need
to feed a real ETHERNET packet to it (in order to see if the crc check
is exeuted correctly etc.). I will realy appreciate to get a complete
ETHERNET packet (all bytes from PREAMBLE to FCS) so I could insert it
to my modelsim simulation.

the format I'm expecting is as follows..

[55][55][55]... -> .. [FCS3][FCS2][FCS1][FCS0]

 

[Allan Herriman]

On 12 Jul 2004 01:43:55 -0700, moti@terasync.net (Moti Cohen) wrote:

Hy guys, I'm currently working on a 10/100 ETHERNET mac implementation
in an FPGA (using vhdl). in order to simulate my state machine I need
to feed a real ETHERNET packet to it (in order to see if the crc check
is exeuted correctly etc.). I will realy appreciate to get a complete
ETHERNET packet (all bytes from PREAMBLE to FCS) so I could insert it
to my modelsim simulation.

the format I'm expecting is as follows..

[55][55][55]... -> .. [FCS3][FCS2][FCS1][FCS0]

You could use a network sniffer to capture a packet from your LAN.
This will not capture the preamble and is unlikely to capture the CRC.
You may get lucky though.
I just checked with Ethereal ( http://www.ethereal.com/ ) and it
didn't capture the CRC on my hardware

Or, you could ask on news:comp.dcom.lans.ethernet, where this question
would be on-topic.

Regards,
Allan.

 

[Moti Cohen]

Allan Herriman <allan.herriman.hates.spam@ctam.com.au.invalid> wrote in message news:<2fl4f0logarjcjnhkh3ovi9eckaqqkj0jo@4ax.com>...

On 12 Jul 2004 01:43:55 -0700, moti@terasync.net (Moti Cohen) wrote:
thnaks..

luckily, I found a program in the web that generates a complete ethernet packet.
This is the link if anyone needs a similar thing..

http://www.fpga4fun.com/10BASE-T2.html

Regards, Moti.

Hy guys, I'm currently working on a 10/100 ETHERNET mac implementation
in an FPGA (using vhdl). in order to simulate my state machine I need
to feed a real ETHERNET packet to it (in order to see if the crc check
is exeuted correctly etc.). I will realy appreciate to get a complete
ETHERNET packet (all bytes from PREAMBLE to FCS) so I could insert it
to my modelsim simulation.

the format I'm expecting is as follows..

[55][55][55]... -> .. [FCS3][FCS2][FCS1][FCS0]

You could use a network sniffer to capture a packet from your LAN.
This will not capture the preamble and is unlikely to capture the CRC.
You may get lucky though.
I just checked with Ethereal ( http://www.ethereal.com/ ) and it
didn't capture the CRC on my hardware

Or, you could ask on news:comp.dcom.lans.ethernet, where this question
would be on-topic.

Regards,
Allan.