> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On > Behalf Of [EMAIL PROTECTED] > Sent: Wednesday, August 06, 2008 4:33 PM > To: Mailing list for lwIP users > Subject: Re: [lwip-users] Xilinx Board LWIP UDP Packet Length > limitation > > I don't have experience with ethernet packets bigger than1514 bytes, > but > I think the main limitations are: > - netif->mtu (you have to set this when initializing the netif) > - TCP_MSS (as you already have discovered) > - IP fragmentation: either turn it off (define IP_FRAG to 0) or set > IP_FRAG_MAX_MTU higher than its default (1500) > > there may be more though...
You have to be sure all devices on the switch are Jumbo Frame enabled too. 2 packets come in back to back within microseconds of each other. I don't really think there is any significant benefit to large frames. In our application using them improved bandwidth a negligible amount. We don't want network compatibility issues or requirements for Jumbo Frame supporting hardware to be installed to work with our device, so we stuck with the industry standard normal packet size. Bill _______________________________________________ lwip-users mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/lwip-users
