![]() ![]() You can use the transferTo () method to transfer bytes directly from the channel on. The Java class libraries support zero copy on Linux and UNIX systems through the transferTo () method in. Ip route default via fe80::117:30ff:1e9c:b596 dev eno2 proto ra metric pref mediumĭefault dev he-ipv6-vz metric 100 pref mediumĭefault dev he-ipv6-nw metric 200 pref mediumīut accessing the translated IPv6 IPs for internal hosts only work when I change the default ipv6 route on the router. Zero copy greatly improves application performance and reduces the number of context switches between kernel and user mode. $IP6TABLES -t nat -A POSTROUTING -s $IPv6_ULA -o he-ipv6-nw -j NETMAP -to $HE_NW_IPv6 $IP6TABLES -t nat -A PREROUTING -d $HE_VZ_IPv6 -i he-ipv6-vz -j NETMAP -to $IPv6_ULA $IP6TABLES -t nat -A POSTROUTING -s $IPv6_ULA -o he-ipv6-vz -j NETMAP -to $HE_VZ_IPv6 It is designed around a native, zero-copy API that supports. $IP6TABLES -t nat -A PREROUTING -d $SPECTRUM_IPv6_PD -i eno2 -j NETMAP -to $IPv6_ULA The IX dataplane allows for networking stacks that op- timize for both bandwidth and latency. Iptables script $IP6TABLES -t nat -A POSTROUTING -s $IPv6_ULA -o eno2 -j NETMAP -to $SPECTRUM_IPv6_PD I have policy routing set up which works great for outgoing connections. The netmap framework provides zero-copy packet processing. ![]() Why can’t I map host memory I’m using a GeForce 9500 GT on a Ubuntu 9.10 (standard x86 version, no 64bits), and I’m using the toolkit 2.2 and the kernel mod. netmap, applications access the network card directly without involvement of the host stack. This causes all incoming connections to fail over WANs 2 + 3. So I tried the simpleZeroCopy example in the SDK and it returned Device 0 cannot map host memory which happens when the device does not have the canMapHostMemory property. Incoming connections to a ULA IP over WAN2 (translated) should then go back out WAN2, but instead they go out WAN1 (the default gw). Outgoing connections work fine and I can policy-route through the different ISPs. For example, I can ping the translated IP for WAN1, but the translated IPs for WANs 2 and 3 time out unless I change the default route to go out WAN 2 or 3. For some reason incoming connections only work for the default route, not ISPs #2 and #3. I have an ip6tables router with 3 WANs, each supporting IPv6.
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