Why after reboot, an extra default route gets added in the system ?

Solution Verified - Updated -

Issue

  • At every system reboot, extra default route like below gets added in the system.
~]# cat route 
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
[...]
0.0.0.0         192.168.A.B     0.0.0.0         UG    0      0        0 eth3  <<--- [1]
0.0.0.0         10.5.X.Y        0.0.0.0         UG    0      0        0 eth3  <<--- [2]
~]#
  • Even after deleting route like route del -net 0.0.0.0 netmask 0.0.0.0 gw 10.5.X.Y same gets added after system reboot. Why ?

Environment

  • Red Hat Enterprise Linux (Any Version)

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