Hi Jack,

Here are commits that I am using:

Old library: commit a88c343 (16 Nov 2010)

New library: commit ecab6f (2 Jan 2015)

Cheers,
Kaustubh

On Mon, Sep 5, 2016 at 6:07 PM, Jack Hickish <jackhick...@gmail.com> wrote:

> Hi Kaustubh,
>
> What version of the mlib_devel libraries are you using?
>
> Cheers,
>
> Jack
>
> On Mon, 5 Sep 2016 at 08:11 Kaustubh Rajwade <rkaustub...@gmail.com>
> wrote:
>
>> Hi Casperites,
>>
>> I have a simple ROACH 1 design streaming packets via two 10GbE ports
>> (clock:160 MHz). When I compile the design using old libraries (XSG: 11.4,
>> Matlab 2009), I have no issues in receiving packets via sockets. When I
>> compile the same design using newer libraries (XSG:14.7, Matlab2013a), I
>> can receive packets via tcpdump but I get bad checksum and I cannot capture
>> the packets using standard methods (e.g. recvfrom()). An example of the
>> checksum error is shown below:
>>
>>
>>
>>
>>
>>
>>
>>
>> *tcpdump: listening on eth2, link-type EN10MB (Ethernet), capture size
>> 262144 bytes16:04:58.998384 02:02:0a:00:00:1f > 00:25:90:63:13:ac,
>> ethertype IPv4 (0x0800), length 8242: (tos 0x0, ttl 255, id 0, offset 0,
>> flags [DF], proto UDP (17), length 8228, bad cksum 63a8 (->47a0)!)
>> 10.0.0.31.48400 > 10.0.0.10.48500: [no cksum] UDP, length 8200
>> 0x0000:  0025 9063 13ac 0202 0a00 001f 0800 4500        0x0010:  2024 0000
>> 4000 ff11 63a8 0a00 001f 0a00        0x0020:  000a bd10 bd74 2010 0000 0000
>> 0027 8734*
>> I validated the payload in the udp packets by sending counter values.
>>
>> Has anyone experienced this issue before?
>>
>> Cheers,
>> Kaustubh
>>
>

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