RHEL 7 hosts never expire ICMP Redirect route cache entries

Solution Verified - Updated -

Issue

  • RHEL 7 hosts which have received an ICMP Redirect never expire the entry from their route cache.

    # ip route show cache | wc -l
    0
    
    # cat /proc/net/rt_cache | wc -l
    0
    
    # ip route get 10.20.30.10
    10.20.30.10 via 192.168.100.10 dev eth1  src 192.168.100.113 
        cache <redirected> 
    

Environment

  • Red Hat Enterprise Linux 7

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