Add pesistence static route

In this case the interface is called eth0. Same procedure with bonded interfaces. Eg. bond0

  /etc/sysconfig/network-scripts/route-eth0:
  GATEWAY0=192.168.1.254
  NETMASK0=255.255.255.0
  ADDRESS0=192.168.55.0
  GATEWAY1=10.164.234.112
  NETMASK1= 255.255.255.240
  ADDRESS1=10.164.234.132

Alternative use this notation in route-eth0:
  192.168.55.0/24 via 192.168.1.254
  
In order to add route restart network service:

  service network restart