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-rw-r--r--Documentation/networking/ip-sysctl.txt12
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diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 9375324aa8e1..5cdc37c34830 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -1560,6 +1560,18 @@ skip_notify_on_dev_down - BOOLEAN
on userspace caches to track link events and evict routes.
Default: false (generate message)
+nexthop_compat_mode - BOOLEAN
+ New nexthop API provides a means for managing nexthops independent of
+ prefixes. Backwards compatibilty with old route format is enabled by
+ default which means route dumps and notifications contain the new
+ nexthop attribute but also the full, expanded nexthop definition.
+ Further, updates or deletes of a nexthop configuration generate route
+ notifications for each fib entry using the nexthop. Once a system
+ understands the new API, this sysctl can be disabled to achieve full
+ performance benefits of the new API by disabling the nexthop expansion
+ and extraneous notifications.
+ Default: true (backward compat mode)
+
IPv6 Fragmentation:
ip6frag_high_thresh - INTEGER