From: Jakub Sitnicki <j...@redhat.com> Date: Wed, 23 Aug 2017 09:55:41 +0200
> Reflecting IPv6 Flow Label at server nodes is useful in environments > that employ multipath routing to load balance the requests. As "IPv6 > Flow Label Reflection" standard draft [1] points out - ICMPv6 PTB error > messages generated in response to a downstream packets from the server > can be routed by a load balancer back to the original server without > looking at transport headers, if the server applies the flow label > reflection. This enables the Path MTU Discovery past the ECMP router in > load-balance or anycast environments where each server node is reachable > by only one path. > > Introduce a sysctl to enable flow label reflection per net namespace for > all newly created sockets. Same could be earlier achieved only per > socket by setting the IPV6_FL_F_REFLECT flag for the IPV6_FLOWLABEL_MGR > socket option. > > [1] https://tools.ietf.org/html/draft-wang-6man-flow-label-reflection-01 > > Signed-off-by: Jakub Sitnicki <j...@redhat.com> Ok, applied.
