Re: [casper] maximum 10 GbE packet size

2009-06-24 Thread David George
A note to all those who are interested in or are using the 10Ge V2 core, it now supports frame sizes of 8704 bytes, and will resolve the issues discussed earlier in this thread. These changes apply from CASPER SVN revision 2019. Cheers, David

Re: [casper] maximum 10 GbE packet size

2009-06-23 Thread David George
Hi All. On 10GbEv2 it is 8192, plus UDP and IP headers etc. But there would be no space for your application headers. This is correct, 8k is the V2 limit. There are a few problems with the current implementation, firstly it would be far more useful to support 8k data payload + some

[casper] maximum 10 GbE packet size

2009-06-22 Thread John Ford
Hi. Does anybody know the actual limit on packet size for the original xilinx and the V2 10 GbE cores? The documents say something vague like about 8k bytes, but is there a known hard limit to the packet size in each case? We want to package up 8K (8192) bytes of data + a few words of framing,

Re: [casper] maximum 10 GbE packet size

2009-06-22 Thread Jason Manley
On 10GbEv2 it is 8192, plus UDP and IP headers etc. But there would be no space for your application headers. When we specc'd it originally, the thought here was that 8192b is the closest power-of-2 for BRAM sizing to that same 9216b limit for most NICs. If we wanted to get to 9000, we'd

Re: [casper] maximum 10 GbE packet size

2009-06-22 Thread John Ford
On 10GbEv2 it is 8192, plus UDP and IP headers etc. But there would be no space for your application headers. When we specc'd it originally, the thought here was that 8192b is the closest power-of-2 for BRAM sizing to that same 9216b limit for most NICs. If we wanted to get to 9000, we'd