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===== Link Layer ===== The device must support L2MTU up to 9216, which is L3MTU of 9198. It should optimize for 4KB payload: 4096 + 40B IPv6 + 20B TCP + 12B TCP options (RFC 7323 timestamp). TCP options are included in MSS calculation [ref_id:rfc_6691], so this gives an MSS of 4108 and L3MTU of 4168. <pre>For VAL in 1500 4168 9198: ip link set dev eth0 mtu $VAL</pre> The device must support 64 concurrent unicast and multicast MAC filters: <pre>For BYTE in {1..64}: ip link add link eth0 dev eth0.$BYTE address 22:22:22:22:22:$BYTE type macvlan</pre> The device must support promiscuous (all addresses) and allmulti (all multicast addresses) modes: <pre>For VAL in off on off: ip link set dev eth0 promisc $VAL ip link set dev eth0 allmulticast $VAL</pre> <span id="functional"></span>
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