create a "route" file:
vi /etc/sysconfig/network-scripts/route-eno16777736
default via 192.168.26.2
[root@centos7 network-scripts]# systemctl restart network.service
[root@centos7 network-scripts]# ip route
default via 192.168.26.2 dev eno16777736
169.254.0.0/16 dev eno16777736 scope link metric 1002
192.168.26.0/24 dev eno16777736 proto kernel scope link src 192.168.26.11