rfc9715v2.txt		rfc9715.txt
	skipping to change at line 591 ¶		skipping to change at line 591 ¶
	limit (max-udp-size). The UDP response packet is bound to be between		limit (max-udp-size). The UDP response packet is bound to be between
	512 and 4096 bytes, with the default set to 1232. BIND 9 supports		512 and 4096 bytes, with the default set to 1232. BIND 9 supports
	the requestor's size up to the configured limit (max-udp-size).		the requestor's size up to the configured limit (max-udp-size).
	In the case of R4 and the send fails with EMSGSIZE, BIND 9 sets the		In the case of R4 and the send fails with EMSGSIZE, BIND 9 sets the
	TC bit and tries to send a minimal answer again.		TC bit and tries to send a minimal answer again.
	For R5, BIND 9 uses the edns-buf-size option, with the default of		For R5, BIND 9 uses the edns-buf-size option, with the default of
	1232.		1232.
	BIND 9 does implement R6.
	For R7, after two UDP timeouts, BIND 9 will fall back to TCP.		For R7, after two UDP timeouts, BIND 9 will fall back to TCP.
	C.2. Knot DNS and Knot Resolver		C.2. Knot DNS and Knot Resolver
	Both Knot servers set IP_PMTUDISC_OMIT to avoid path MTU spoofing.		Both Knot servers set IP_PMTUDISC_OMIT to avoid path MTU spoofing.
	The UDP size limit is 1232 by default.		The UDP size limit is 1232 by default.
	Fragments are ignored if they arrive over a Linux XDP interface.		Fragments are ignored if they arrive over a Linux XDP interface.
	TCP is attempted after repeated UDP timeouts.		TCP is attempted after repeated UDP timeouts.
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