Commit be26849b authored Jul 31, 2015 by Tom Herbert Committed by David S. Miller Jul 31, 2015

ipv6: Disable flowlabel state ranges by default



Per RFC6437 stateful flow labels (e.g. labels set by flow label manager)
cannot "disturb" nodes taking part in stateless flow labels. While the
ranges only reduce the flow label entropy by one bit, it is conceivable
that this might bias the algorithm on some routers causing a load
imbalance. For best results on the Internet we really need the full
20 bits.

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 42240901

net/ipv6/af_inet6.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -771,7 +771,7 @@ static int __net_init inet6_net_init(struct net *net)
		net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
		net->ipv6.sysctl.idgen_retries = 3;
		net->ipv6.sysctl.idgen_delay = 1 * HZ;
		net->ipv6.sysctl.flowlabel_state_ranges = 1;
		net->ipv6.sysctl.flowlabel_state_ranges = 0;
		atomic_set(&net->ipv6.fib6_sernum, 1);

		err = ipv6_init_mibs(net);