Question: How to change an IP address on a SCO server? 2

[jamba]

Hi all. Before I start into the question I just want to say thanks for all of the help that people have given me in this newsgroup and with emails. It is all really appriciated.

I have asked this question before here and have gotten good information. I am just a little confused about what is happening.

I have a SCO Open Server 5. I want to change its IP address. Right now it is at a 198 scheme. I am able to ping the loop back address, the server's ip address, the gateway ip address and any pc on the network. When I type netstat -rn to see the local routing table this is what I see:

Destination Gateway Flags Refs Use Interface
default 198.x.x.1 UGS 0 8116 net0
127.0.0.1 127.0.0.1 UH 2 12 lo0
198.x.x.0 198.x.x.4 UC 1 0 net0
198.x.x.4 127.0.0.1 UGHS 4 46 lo0
224 198.x.x.4 UCS 0 0 net0

Everything works fine with this ip scheme. I go into the gui interface to change the IP address of the NIC. It automatically changes the /etc/tcp file. I have changed the /etc/hosts file to have the new ip addresses of the network in it. I then manually change to the /etc/default/tcp file so that it has the correct netmask and broadcast address. When I reboot I get an error message from the portmapper at the 198 ip address. When I type the netstat -rn I get everything except the default route. I add the default address as 10.10.1.1 which is the gateway for the new ip scheme. The problem is that I can't ping the machine's ip address. I can ping 127.0.0.1 and 10.10.1.1, but not 10.10.1.4 or the name of the machine. I have gotten information on all of the files that are responcible for ip addresses and have checked them all and it is still not acting right. Is there a script somewhere in SCO that creates the default ip route? How can I make sure that the new ip address becomes the default route?

I am getting extremely frustrated with this whole process. I must be missing something because I can't imagine that it should be this tough to change an IP address of this server. I would really appriciate any help.


Thank you in advance,

Andy Richards

arichards@bccz.com

 

[KenCunningham]

Andy,

don't know if this will help, but I've placed my default route in /etc/rc2.d/S99route so that it's picked up as one of the last events at boot time. Seems to work OK here.

Good luck.

 

[Nostradamus]

I got the same problem when changing ip-adress through Scoadmin.
I won´t do that again. I always do it manually like this...

Localhost seems to function all right but try these commands anyway.

ifconfig lo0 127.0.0.1 perf 57344 57344 1

ifconfig -p net0 [ip of server] netmask [your netmask] broadcast [broadcast ip] perf 24576 24576 1

/etc/route add 224.0.0.0 [ip of server] 0 > /dev/null 2>&1
(I don´t know if you use multicast but since you have it already...)

/etc/route add 0.0.0.0 [default gateway] 1 > /dev/null 2>&1
(this is the setting that scoadmin lost in my case)

Make sure that netmasks and ip-adresses are correct.
The next time you boot up SCO will read this file, assuming you use runlevel 2, /etc/rc2.d/S85tcp
Look into this file and make the above changes in the section...
#
# Interface configuration -- edit as appropriate.
#

ifconfig lo0 127.0.0.1 perf 57344 57344 1
ifconfig -p net0 [ip of server] netmask [your netmask] broadcast [broadcast ip] perf 24576 24576 1
/etc/route add 224.0.0.0 [ip of server] 0 > /dev/null 2>&1
/etc/route add 0.0.0.0 [default gateway] 1 > /dev/null 2>&1

since you have configured /etc/hosts and /etc/default/tcp I suggest a restart of the server and some wishthinking. /Sören

 

[abovebrd]

Check out this link. It pretty much sums up your problem.

URL:

http://www.sco.com/cgi-bin/ssl_reference?107569

TA #: 107569
Problem
I have manually run the 'route add default' command to add a default route to the route table. This route works successfully, but I also want this route to be added to the route table automatically whenever the system is rebooted.

Solution
The 'route add default' statement should be added in the /etc/rc2.d directory. In SCO Open Server 3.0, the route add statement was included in /etc/tcp or /etc/rc.d/8/userdef. However, in SCO OpenServer 5.0, some of the startup scripts are executed in parallel which cause some timing issues. Therefore it is recommended that a new file named S99route be created in /etc/rc2.d which includes the route add statement.

# cd /etc/rc2.d
# vi S99route
echo "Setting default route"
/etc/route add default <IP#>

(where <IP#> is the 'gateway' IP address)


# chown root S99route
# chgrp sys S99route
# chmod 744 S99route





-Danny

 

[treecody]

Andy,

All you have to do to keep it each time you re-boot is put the default gateway in /etc/tcp, there is a line in this file that says # Add My Static Route Here, this is what you type in /etc/route add default (gateway is your ip address).

It's important the you ad this after the routed and gated daemons have been started.

I did this and now every time I reboot, everything gets pointed in the right direction.

Hope this helps you.

Treecody

 

[stanhubble]

to get rid of the portmapper error for your old address make sure there are no entries for it in your /etc/hosts file

HTH
stan