Hello, On Thu, 2022-04-28 at 09:55 +0800, Tan Tee Min wrote: > On Tue, Apr 26, 2022 at 03:58:56PM +0200, Kurt Kanzenbach wrote: > > Hi, > > > > On Tue Apr 26 2022, Tan Tee Min wrote: > > > Based on DesignWare Ethernet QoS datasheet, we are seeing the limitation > > > of Split Header (SPH) feature is not supported for Ipv4 fragmented packet. > > > This SPH limitation will cause ping failure when the packets size exceed > > > the MTU size. For example, the issue happens once the basic ping packet > > > size is larger than the configured MTU size and the data is lost inside > > > the fragmented packet, replaced by zeros/corrupted values, and leads to > > > ping fail. > > > > > > So, disable the Split Header for Intel platforms. > > > > Does this issue only apply on Intel platforms? > > According to Synopsys IP support, they have confirmed the header-payload > splitting for IPv4 fragmented packets is not supported for the Synopsys > Ether IPs. > > Intel platforms are integrating with GMAC EQoS IP which is impacted by the > limitation above, so we are changing the default SPH setting to disabled > for Intel Platforms only. > > If anyone can confirm on their platform also having the same issues, > then we would change the SPH default to disable across the IPs. Could you please provide a Fixes tag here? Thanks! Paolo
