Hello, I upgraded routers from 3.14.x to 4.1.2. Forwarding ISATAP-packets (IPv4 packets with IPv6 payload) is very slow with 4.1 if GRO is enabled (youtube for example about 64kbit). Disabling GRO on the interfaces restores performance to values comparable to 3.14.x.
The kernel is build with IPv6 support but IPv6 is disabled via kernel command line. The router is not a tunnel endpoint, it only forwards the ISATAP- packets. MTU is 1500 on both interfaces. Netfilter conntrack is not used and disabling netfilter has no effect. Regards, -- Wolfgang Walter Studentenwerk München Anstalt des öffentlichen Rechts -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
