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Miller" , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org On Tue, Sep 15, 2020 at 08:17:40PM +0800, lina.wang wrote: > We didnot get the router's log, which is some operator's.Actually, after > we patched, there is no such issue. Sometimes,router will return > packet-too-big, most of times nothing returned,dropped silently This looks like a broken router, we can't fix that in the code. > On Tue, 2020-09-15 at 11:32 +0200, Steffen Klassert wrote: > > On Tue, Sep 15, 2020 at 05:05:22PM +0800, lina.wang wrote: > > > > > > Yes, DF bit is not set. > > > > ... > > > > > Those two packets are fragmented to one big udp packet, which payload is 1516B. > > > After getting rid of tunnel header, it is also a udp packet, which payload is > > > 1466 bytes.It didnot get any response for this packet.We guess it is dropped > > > by router. Because if we reduced the length, it got response. > > > > If the DF bit is not set, the router should fragment the packet. If it > > does not do so, it is misconfigured. Do you have access to that router? > _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek