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Linux Networking static ip WRT54G linksys router

I found this solution to seta static ip address

If you want to be able to assign the linux machine a static IP, you need to:

1. Go into your routers configuration - 192.168.1.1
2. Click the DHCP tab
3. Set starting IP address to something like 192.168.100
*The important part is that you assign a static IP outside of this range.
4. Apply settings.
5. Assign your linux machine an IP lower than 192.168.1.100 (or lower than whatever you set that value in step 3) try 192.168.1.50

I have carried out the following to a linux1 and a linux2 box. http://www.oracle.com/technology/pub/articles/hunter_rac10gr2.html#7

of when I uncheck the box use DHCP and check static ip on network setting on linux box I cannot connect to the internet. When I check dhcp I can connect. Using the command ifconfig tells me I have an ip address of 192.168.1.nnn where nn is any number greater then 100. HOW can I make it work so that I can set the network setting to static ip address as below and connect everytime without having to check dhcp.
Thanks in advance.

Server 1 (linux1)
Device IP Address Subnet Purpose
eth0 192.168.1.100 255.255.255.0 Connects linux1 to the public network
eth1 192.168.2.100 255.255.255.0 Connects linux1 (interconnect) to linux2 (int-linux2)
/etc/hosts
127.0.0.1 localhost loopback

# Public Network - (eth0)
192.168.1.100 linux1
192.168.1.101 linux2

# Private Interconnect - (eth1)
192.168.2.100 int-linux1
192.168.2.101 int-linux2

# Public Virtual IP (VIP) addresses for - (eth0)
192.168.1.200 vip-linux1
192.168.1.201 vip-linux2

Server 2 (linux2)
Device IP Address Subnet Purpose
eth0 192.168.1.101 255.255.255.0 Connects linux2 to the public network
eth1 192.168.2.101 255.255.255.0 Connects linux2 (interconnect) to linux1 (int-linux1)
/etc/hosts
127.0.0.1 localhost loopback

# Public Network - (eth0)
192.168.1.100 linux1
192.168.1.101 linux2

# Private Interconnect - (eth1)
192.168.2.100 int-linux1
192.168.2.101 int-linux2

# Public Virtual IP (VIP) addresses for - (eth0)
192.168.1.200 vip-linux1
192.168.1.201 vip-linux2

Note

noci

If you dont use DHCP, what is the gateway?

use netstat -rn
to check on the server.
if ther is no line like

0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0

there then the gateway is not set and packets for the internet won't go to you linksys

dplinnane

ASKER

Started my linux up ran
1. ifconfig
2. netstat -rn
tried to connect to internet
no connection
checked enable dhcp
able to connect reran steps 1 and 2 results below.

WHAT DO I NEED TO DO?

[root@linux2 ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:13:72:C4:32:7F
inet addr:192.168.1.101 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::213:72ff:fec4:327f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:484 errors:0 dropped:0 overruns:0 frame:0
TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:36148 (35.3 KiB) TX bytes:630 (630.0 b)

eth1 Link encap:Ethernet HWaddr 00:14:BF:54:A2:51
inet addr:192.168.2.101 Bcast:192.168.2.255 Mask:255.255.255.0
inet6 addr: fe80::214:bfff:fe54:a251/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:630 (630.0 b)
Interrupt:193 Base address:0x6400

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:6191 errors:0 dropped:0 overruns:0 frame:0
TX packets:6191 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:8481314 (8.0 MiB) TX bytes:8481314 (8.0 MiB)

[root@linux2 ~]# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1
[root@linux2 ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:13:72:C4:32:7F
inet addr:192.168.1.101 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::213:72ff:fec4:327f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:619 errors:0 dropped:0 overruns:0 frame:0
TX packets:13 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:47036 (45.9 KiB) TX bytes:1314 (1.2 KiB)

eth1 Link encap:Ethernet HWaddr 00:14:BF:54:A2:51
inet addr:192.168.2.101 Bcast:192.168.2.255 Mask:255.255.255.0
inet6 addr: fe80::214:bfff:fe54:a251/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:630 (630.0 b)
Interrupt:193 Base address:0x6400

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:6194 errors:0 dropped:0 overruns:0 frame:0
TX packets:6194 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:8481470 (8.0 MiB) TX bytes:8481470 (8.0 MiB)

[root@linux2 ~]# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
[root@linux2 ~]#

noci

Compare Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1

with this
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0

The missing line is indeed:
the line with 0.0.0.0 when you setup manualy...

When configuring eth0:
(figure 3)
Look very careful to also fillout The bottom field: Gateway as this will add
extra routing entry.
The field after "Default Gateway address", If you specifiy DHCP it part of what is sent to your system,
if you setup manually thenyou need to suply it. The default Gateway is not needed for local access.

noci

ALso leave the default gateway address in eth1 empty!
As per figure 4.

dplinnane

ASKER

The good news is that LINUX2 works. I think the main reason is that I reset my linkskys mode to start from 168.192.1.50 and limit it to 49 DHCP users.
See below for LINUX1 comments.

[root@linux2 ~]# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
[root@linux2 ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:13:72:C4:32:7F
inet addr:192.168.1.101 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::213:72ff:fec4:327f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:138 errors:0 dropped:0 overruns:0 frame:0
TX packets:145 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:18151 (17.7 KiB) TX bytes:11921 (11.6 KiB)

eth1 Link encap:Ethernet HWaddr 00:14:BF:54:A2:51
inet addr:192.168.2.101 Bcast:192.168.2.255 Mask:255.255.255.0
inet6 addr: fe80::214:bfff:fe54:a251/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:630 (630.0 b)
Interrupt:193 Base address:0x6400

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:6213 errors:0 dropped:0 overruns:0 frame:0
TX packets:6213 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:8714466 (8.3 MiB) TX bytes:8714466 (8.3 MiB)

[root@linux2 ~]#

########################## LINUX1 #####################################

[root@linux1 ~]# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1
[root@linux1 ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:13:72:D1:A7:AF
inet6 addr: fe80::213:72ff:fed1:a7af/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:13 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1476 (1.4 KiB) TX bytes:420 (420.0 b)

eth1 Link encap:Ethernet HWaddr 00:14:BF:54:A2:6A
inet addr:192.168.2.100 Bcast:192.168.2.255 Mask:255.255.255.0
inet6 addr: fe80::214:bfff:fe54:a26a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:630 (630.0 b)
Interrupt:193 Base address:0x6400

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:6092 errors:0 dropped:0 overruns:0 frame:0
TX packets:6092 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:7969414 (7.6 MiB) TX bytes:7969414 (7.6 MiB)

#########################################
I checked DHCP and reran ifconfig and it grabs ip address 192.168.1.51 and I can not connect to the internet.
At the same time I noticed my laptop had an IP address of 192.168.1.100. Two machines can'thave the same ip so maybe that's why LINUX1 fails. The laptop IP was grabbed before I reset linksys router. I guessed that if I set the LINUX1 to 192.168.1.110 for etho and 192.168.2.100 for ETH1 and rebooted it may work. Low and behold after checking static ip check box modifying to new ip address and restarting LINUX1 that it had an ip address of 192.168.1.110 and I was able to connect to the internet.
I'm guessing that if I reset it back to 192.168.1.100 with my laptop disconnected it will still work or even if I have my laptop connected it will grab lowestip address
192.168.1.51. Am I making sense. I will check the following when I go home, may have a few more questions before I close out.

ifconfig
eth0 Link encap:Ethernet HWaddr 00:13:72:D1:A7:AF
inet addr:192.168.1.51 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::213:72ff:fed1:a7af/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:465 errors:0 dropped:0 overruns:0 frame:0
TX packets:438 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:406668 (397.1 KiB) TX bytes:77999 (76.1 KiB)

eth1 Link encap:Ethernet HWaddr 00:14:BF:54:A2:6A
inet addr:192.168.2.100 Bcast:192.168.2.255 Mask:255.255.255.0
inet6 addr: fe80::214:bfff:fe54:a26a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:630 (630.0 b)
Interrupt:193 Base address:0x6400

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:6095 errors:0 dropped:0 overruns:0 frame:0
TX packets:6095 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:7969570 (7.6 MiB) TX bytes:7969570 (7.6 MiB)

######################## LAPTOP ##########################################
C:\Documents and Settings\plinnane>ipconfig/all

Windows IP Configuration

Host Name . . . . . . . . . . . . : plinnane-us
Primary Dns Suffix . . . . . . . : us.oracle.com
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : us.oracle.com
austin.rr.com
oracle.com

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . : austin.rr.com
Description . . . . . . . . . . . : Broadcom NetXtreme 57xx Gigabit Controller
Physical Address. . . . . . . . . : 00-15-C5-0A-D5-85
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.1.100
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IP Address. . . . . . . . . . . . : fe80::215:c5ff:fe0a:d585%20
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DNS Servers . . . . . . . . . . . : 24.93.41.125
24.93.41.126
fec0:0:0:ffff::1%4
fec0:0:0:ffff::2%4
fec0:0:0:ffff::3%4
Lease Obtained. . . . . . . . . . : Wednesday, July 19, 2006 9:04:23 PM
Lease Expires . . . . . . . . . . : Thursday, July 20, 2006 9:04:23 PM

Tunnel adapter Teredo Tunneling Pseudo-Interface:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : FF-FF-FF-FF-FF-FF-FF-FF
Dhcp Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : fe80::5445:5245:444f%5
Default Gateway . . . . . . . . . :
NetBIOS over Tcpip. . . . . . . . : Disabled

Tunnel adapter Automatic Tunneling Pseudo-Interface:

Connection-specific DNS Suffix . : austin.rr.com
Description . . . . . . . . . . . : Automatic Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : C0-A8-01-64
Dhcp Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : fe80::5efe:192.168.1.100%2
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%4
fec0:0:0:ffff::2%4
fec0:0:0:ffff::3%4
NetBIOS over Tcpip. . . . . . . . : Disabled

ASKER CERTIFIED SOLUTION

noci

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noci

btw your current setup should be OK because the hight DHCP addres now can be 99, that's safe.

dplinnane

ASKER

Great job everythinG is now working.