Problem in network configuration

UNIX Solaris
1

Hi everybody,
I have a very strange problem ; if somebody could help me it would be very kind. I'll try to explain my problem.
I have 2 unix machines absolutely identical running solaris 9.
For network reasons I need to change the IP address of the 2 machines.
I proceed exactly the same on the 2 machines, that is :
update file /etc/inet/hosts
update file /etc/inet/netmasks
update file /etc/inet/defaultrouter
then reboot both machines

The machine 1 is OK : the new configuration is taken into account. Here is the result of some commands :

ifconfig -a
lo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1
inet 127.0.0.1 netmask ff000000
bge0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
inet 10.67.172.130 netmask ffffffe0 broadcast 10.67.172.159
ether 0:14:4f:c4:5e:d2

netstat -rn

Routing Table: IPv4
Destination Gateway Flags Ref Use Interface
-------------------- -------------------- ----- ----- ------ ---------
10.67.172.128 10.67.172.130 U 1 23 bge0
224.0.0.0 10.67.172.130 U 1 0 bge0
default 10.67.172.129 UG 1 79
127.0.0.1 127.0.0.1 UH 2 11 lo0

netstat -I bge0
Name Mtu Net/Dest Address Ipkts Ierrs Opkts Oerrs Collis Queue
bge0 1500 okapi1 okapi1 19672 0 21477 0 0 0

The second machine does not take the configuration I gave it. The same commands give :

ifconfig -a
lo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1
inet 127.0.0.1 netmask ff000000
bge0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
inet 10.67.172.131 netmask ff000000 broadcast 10.255.255.255
ether 0:14:4f:c4:34:c

netstat -rn

Routing Table: IPv4
Destination Gateway Flags Ref Use Interface
-------------------- -------------------- ----- ----- ------ ---------
10.0.0.0 10.67.172.131 U 1 60 bge0
224.0.0.0 10.67.172.131 U 1 0 bge0
default 10.67.172.129 UG 1 19
127.0.0.1 127.0.0.1 UH 2 25 lo0

netstat -I bge0
Name Mtu Net/Dest Address Ipkts Ierrs Opkts Oerrs Collis Queue
bge0 1500 arpanet okapi2 955 0 993 0 0 0

The result is that cannot connect via the network.
Note that if correct manually he configuration with the command ifconfig plumb netmask ... broadcast ....
it works again.

If someone could give me an idea ?
Excuse me for being so long in my explanation, but I never had such a problem !

2

I suspect a difference in the /etc/hostname.bge0 files.

3

Yes I had this idea too. But there is no difference /etc/hostname.bge0 contain the name of the machine on each machine and this file has not been modified during the change of IP address.

4

can we see /etc/inet/netmasks from both systems?

5

okapi1 (the right one)
10.67.172.130 255.255.255.224

okapi2 (the wrong one)
10.67.172.131 255.255.255.224

No difference !

6

I assume you have re-booted both systems after the change?

7

of course ! and several times concerning the wrong machine.

8

what's in /etc/inet/netmasks

if i remember right they should be linked.....

9

Excuse me I don't understand. I just posted the content of /etc/inet/netmasks

10

if I remember right...

the netmasks files should have the network number not the IP.

so try putting

10.67.172.128 255.255.255.224

and same in both systems.

11

Excuse me. You're right. I have corrected and the configuration is correct. I have been mistaken by the fact that one machine was working and the other no.
Thanks a lot. Best regards.

12

and FYI...

some systems have a /etc/netmasks and a /etc/inet/netmasks
and in that case they should be hard linked.

thus my random post about linking /etc/inet/netmasks