Signed-off-by: Phil Sutter <>
 man/man8/ | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/man/man8/ b/man/man8/
index d4fae3cc783ba..c0acaa0020ef7 100644
--- a/man/man8/
+++ b/man/man8/
@@ -924,6 +924,12 @@ routes are left unchanged. Any routes specified in the 
data stream that
 already exist in the table will be ignored.
+Starting with Linux kernel version 3.6, there is no routing cache for IPv4
+anymore. Hence
+.B "ip route show cached"
+will never print any entries on systems with this or newer kernel versions.
 ip ro

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