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Re: [lwip-users] Ethernet - all packets over 32 dropped

From: address@hidden
Subject: Re: [lwip-users] Ethernet - all packets over 32 dropped
Date: Mon, 19 Oct 2009 20:26:52 +0200
User-agent: Thunderbird (Macintosh/20090812)

You should provide a little more information about your application (not everyone knows the "provided iperf application", I guess - at least noe me!):

- What API are you using (sockets, netconn, raw)?
- If using raw API, which type of pbuf are you using? (For outgoing data, you should use a PBUF_RAM pbuf)
- What is the pbuf pool size set to (PBUF_POOL_BUFSIZE define)
- Which version of lwIP are you using?

At least with the default options, there should be more space than 32 bytes in the first pbuf (if using a chain), so this might well be a problem of the MAC driver, too.

Having this info, maybe we can help more.


bobbyb wrote:
I have setup ethernet communication using the xps_ll_temac on a virtex 5 and
am using the lwip tcpip stack. Everything works fine when running the
provided iperf application, but when I run my own slightly modified code, it
sends exactly 32 packets every time and drops the rest. Ive tried changing
the number of udp_pcbs, pbufs and memory for pbufs all of which did nothing.
Has anyone encountered a problem like this? Any ideas what could be causing
this? Thanks

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