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ipv6: Disable flowlabel state ranges by default

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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>
This commit is contained in:
Tom Herbert 2015-07-31 16:52:13 -07:00 committed by David S. Miller
parent 42240901f7
commit be26849bfb
1 changed files with 1 additions and 1 deletions
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2
net/ipv6/af_inet6.c
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@ -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);