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Diffstat (limited to 'docs/_include/interface-xdp.txt')
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1 files changed, 24 insertions, 0 deletions
diff --git a/docs/_include/interface-xdp.txt b/docs/_include/interface-xdp.txt new file mode 100644 index 00000000..6f5f88c1 --- /dev/null +++ b/docs/_include/interface-xdp.txt @@ -0,0 +1,24 @@ +.. cfgcmd:: set interfaces {{ var0 }} <interface> xdp + + Enable support for Linux :abbr:`XDP (eXpress Data Path)` on recent 1.3 rolling + releases. You must enable it for every interface which should participate in + the XDP forwarding. + + XDP is an eBPF based high performance data path merged in the Linux kernel + since version 4.8. The idea behind XDP is to add an early hook in the RX path + of the kernel, and let a user supplied eBPF program decide the fate of the + packet. The hook is placed in the NIC driver just after the interrupt + processing, and before any memory allocation needed by the network stack + itself, because memory allocation can be an expensive operation. + + .. warning:: This is highly experimental! + + .. note:: Enabling this feature will break any form of NAT or Firewalling on + this interface, as XDP is handled way earlier in the driver then iptables/ + nftables. + + Example: + + .. code-block:: none + + set interfaces {{ var0 }} {{ var1 }} xdp
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