Linux route add using ‘route’ command

1.     Add/Check IP Address

# ifconfig eth0:1

eth0:1    Link encap:Ethernet  HWaddr 00:0C:29:CA:67:96

          inet addr:192.168.101.114  Bcast:192.168.101.255  Mask:255.255.254.0

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          Interrupt:67 Base address:0x2000

2.       Check default gateway

# netstat -nr

Kernel IP routing table

Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface

192.168.100.0   0.0.0.0         255.255.254.0   U         0 0          0 eth0

169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 eth0

10.0.0.0        0.0.0.0         255.0.0.0       U         0 0          0 eth0

0.0.0.0         10.0.0.1        0.0.0.0         UG        0 0          0 eth0

3.       Execute route command

# route add default gw 192.168.100.1 eth0:1

4.       Check new gateway

# netstat -nr

Kernel IP routing table

Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface

192.168.100.0   0.0.0.0         255.255.254.0   U         0 0          0 eth0

169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 eth0

10.0.0.0        0.0.0.0         255.0.0.0       U         0 0          0 eth0

0.0.0.0         192.168.100.1   0.0.0.0         UG        0 0          0 eth0

0.0.0.0         10.0.0.1        0.0.0.0         UG        0 0          0 eth0