Network setting under Linux ---Embedded Linux Internet Access

[1] http://www.linuxhomenetworking.com/wiki/index.php/Quick_HOWTO_:_Ch03_:_Linux_Networking


[root@GsnCommsModule rc.d]# ifconfig -a
[root@GsnCommsModule rc.d]# cat rc.conf
all_services="mount-proc-sys mdev udev hostname devfsd depmod modules filesystems syslog network inetd portmap dropbear sshd boa smb dhcpd settime qtopia watchdog gtk2 pango"
all_services_r="pango gtk2 watchdog qtopia settime dhcpd smb boa sshd dropbear portmap inetd network syslog filesystems modules depmod devfsd hostname udev mdev mount-proc-sys"

cfg_services="mount-proc-sys mdev hostname depmod modules filesystems syslog network sshd settime "

cfg_services_r=" settime sshd network syslog filesystems modules depmod hostname mdev mount-proc-sys"

export HOSTNAME="GsnCommsModule [-m ] [options....]"
export NTP_SERVER="ntp.cs.strath.ac.uk"
export MODLIST=""
export RAMDIRS="/tmp /var"
export TMPFS="tmpfs"
export TMPFS_SIZE="512k"
export READONLY_FS=""
export INETD_ARGS=""
export BOA_ARGS=""
export SMBD_ARGS=""
export NMBD_ARGS=""
export DHCP_ARG=""
export DEPLOYMENT_STYLE="JFFS2"
export SYSCFG_DHCPC_CMD="udhcpc -b -i "
export DROPBEAR_ARGS=""
# net interface 1
export SYSCFG_IFACE1=y
export INTERFACE1="eth0"
export IPADDR1="10.10.20.89"
export NETMASK1="255.255.0.0"
export BROADCAST1="10.10.255.255"
export GATEWAY1="10.10.10.1"
export NAMESERVER1="10.10.10.1"

[root@GsnCommsModule rc.d]# source rc.local

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VIEW ROUTING TABLE

[root@GsnCommsModule rc.d]# netstat -nr
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
10.10.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo

------------------------------
ADD DEFAULT GATEWAY

[root@GsnCommsModule rc.d]# route add default gw 10.10.10.1 eth0

Routing table with 0.0.0.0 as destination is the default gateway.
[root@GsnCommsModule rc.d]# netstat -nr
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface.1
10.10.0.0 10.10.10.1 255.255.255.255 UGH 0 0 0 eth0
10.10.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 10.10.10.1 0.0.0.0 UG 0 0 0 eth0

------------------------
DELETE GATEWAY

[root@GsnCommsModule rc.d]# route del -net 10.10.0.0 netmask 255.255.255.255 gw 10.10.10.1 eth0
[root@GsnCommsModule rc.d]# netstat -nr
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
10.10.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 10.10.10.1 0.0.0.0 UG 0 0 0 eth0