summaryrefslogtreecommitdiff
path: root/Documentation/networking/ip-sysctl.txt
diff options
context:
space:
mode:
authorNikolay Aleksandrov <nikolay@cumulusnetworks.com>2017-03-16 15:28:00 +0200
committerDavid S. Miller <davem@davemloft.net>2017-03-21 15:27:19 -0700
commitbf4e0a3db97eb882368fd82980b3b1fa0b5b9778 (patch)
treef1e5a3fd90d22fc603bc5a6780fc1c716684ad94 /Documentation/networking/ip-sysctl.txt
parent88997e4208aea117627898e5f6f9801cf3cd42d2 (diff)
net: ipv4: add support for ECMP hash policy choice
This patch adds support for ECMP hash policy choice via a new sysctl called fib_multipath_hash_policy and also adds support for L4 hashes. The current values for fib_multipath_hash_policy are: 0 - layer 3 (default) 1 - layer 4 If there's an skb hash already set and it matches the chosen policy then it will be used instead of being calculated (currently only for L4). In L3 mode we always calculate the hash due to the ICMP error special case, the flow dissector's field consistentification should handle the address order thus we can remove the address reversals. If the skb is provided we always use it for the hash calculation, otherwise we fallback to fl4, that is if skb is NULL fl4 has to be set. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking/ip-sysctl.txt')
-rw-r--r--Documentation/networking/ip-sysctl.txt8
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index ed3d0791eb27..b57308e76b1d 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -73,6 +73,14 @@ fib_multipath_use_neigh - BOOLEAN
0 - disabled
1 - enabled
+fib_multipath_hash_policy - INTEGER
+ Controls which hash policy to use for multipath routes. Only valid
+ for kernels built with CONFIG_IP_ROUTE_MULTIPATH enabled.
+ Default: 0 (Layer 3)
+ Possible values:
+ 0 - Layer 3
+ 1 - Layer 4
+
route/max_size - INTEGER
Maximum number of routes allowed in the kernel. Increase
this when using large numbers of interfaces and/or routes.