Re: [ethmac] what if DATA field is of size zero

[Mike Pratt <mpratt@anr.mcnc.org>]

Hi all,

I am working on a GigE MAC ... using applicable parts of the opencores 
10/100 MAC as a guide.  Does anyone have some sample Ethernet packets 
that would be suitable for testing this core?  I am particularly 
interested in checking that I have implemented crc correctly ... so they 
must have valid crc fields!  Thanks in advance for any assistance.  Regards,

Mike

Igor Mohor(opencores) wrote:

>Opencores Ethernet MAC needs a minimum size of 5 bytes for proper
>functioning. By the standard it is between 64 and 1518.
>
>Regards,
>	Igor
>
>
>
>  
>
>>-----Original Message-----
>>From: owner-ethmac@opencores.org [mailto:owner-ethmac@opencores.org]
>>    
>>
>On
>  
>
>>Behalf Of Kevin Kay
>>Sent: Thursday, January 16, 2003 2:32 PM
>>To: ethmac@opencores.org
>>Subject: RE: [ethmac] what if DATA field is of size zero
>>
>>A minimum legal packet length is 64 bytes.  If you control your entire
>>network, then I guess you can run just about any length packet you
>>    
>>
>wish (0
>  
>
>>length data field all the way to a jumbo packets of 64kbytes or so).
>>However, if it's going to be on an open network, then the acceptable
>>packet lengths are between 64 and 1518 bytes.
>>
>>Regards,
>>Kevin
>>
>>-----Original Message-----
>>From: Mohan Krishna [mailto:mkrishna@tataelxsi.co.in]
>>Sent: Thursday, January 16, 2003 7:35 AM
>>To: ethmac@opencores.org
>>Subject: [ethmac] what if DATA field is of size zero
>>
>>
>>Hi all,
>>
>>Can any one clarify me wether it is possible for the data field be of
>>size zero.
>>if so then if there is an option to disable padding in the transmitter
>>then what is the expected behavior of the receiver.
>>
>>Thanks in advance
>>
>>--
>>To unsubscribe from ethmac mailing list please visit
>>http://www.opencores.org/mailinglists.shtml
>>--
>>To unsubscribe from ethmac mailing list please visit
>>http://www.opencores.org/mailinglists.shtml
>>    
>>
>
>--
>To unsubscribe from ethmac mailing list please visit http://www.opencores.org/mailinglists.shtml
>
>  
>

-- 
Mike Pratt
Network Hardware Engineer
Advanced Networking Research, MCNC
mpratt@anr.mcnc.org
ph: (919) 248-4173




--
To unsubscribe from ethmac mailing list please visit http://www.opencores.org/mailinglists.shtml