ADD
ADDITIONAL IP’s
Well…Suppose a situation that, suddenly one of vendor told that we
want to implement an application which needs two physical IP’s and two virtual
IP’s.
Range of Subnets would be same.
OK… so let’s begin with adding New IP’s to System.
Generally there are 4 interfaces in Sparc Servers or depending upon
HW config.
I don’t have Sparc now, so added 2 new interfaces to VM.
Go to VM settings
Click on add
I had previously selected NAT so I continue with it, plz check in
your setting that what is selected already and go with same.
This way I added 2 interfaces,
Well… Now I have to assign IP’s to them.
But before that I need to find the interfaces… right?
root@sol-test-1:>/#devfsadm
root@sol-test-1:>/#ifconfig -a
lo0:
flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232
index 1
inet 127.0.0.1 netmask
ff000000
e1000g0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu
1500 index 2
inet 192.168.234.133
netmask ffffff00 broadcast 192.168.234.255
ether 0:c:29:b:3:12
Nothing happened… I have only one interface,
There is one more command through which we know that how many
interface we have
root@sol-test-1:>/#dladm show-dev
e1000g0 link: up speed: 1000 Mbps
duplex: full
[**in sparc we will get all interfaces we have]
Still only one…
We need to reboot the System,
Normal init 6 will also work but just given a reconfiguration reboot
root@sol-test-1:>/#reboot -- -r
Now system is back,
root@sol-test-1:>/#who -b
. system boot Oct 10 19:57
Well, Let’s check what happened?
root@sol-test-1:>/#ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL>
mtu 8232 index 1
inet 127.0.0.1 netmask
ff000000
e1000g0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu
1500 index 2
inet 192.168.234.133
netmask ffffff00 broadcast 192.168.234.255
ether 0:c:29:b:3:12
Still… 1 interface,
No Problem, dladm will help
root@sol-test-1:>/#dladm show-dev
e1000g0 link: up speed: 1000 Mbps
duplex: full
e1000g1 link:
unknown speed: 0 Mbps
duplex: unknown
e1000g2 link:
unknown speed: 0 Mbps
duplex: unknown
Super… we got 2 extra interfaces…
Now we have to assign IP to interfaces, Great…
First we need to plumb the Interfaces
root@sol-test-1:>/#ifconfig e1000g1 plumb
root@sol-test-1:>/#ifconfig e1000g2 plumb
root@sol-test-1:>/#ifconfig -a |grep e100*
e1000g0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu
1500 index 2
e1000g1: flags=1000842<BROADCAST,RUNNING,MULTICAST,IPv4> mtu
1500 index 3
e1000g2: flags=1000842<BROADCAST,RUNNING,MULTICAST,IPv4> mtu
1500 index 4
Good…
Now assign IP
root@sol-test-1:>/#ifconfig
e1000g1 inet 192.168.234.168 netmask + broadcast + up
Setting netmask of e1000g1 to 255.255.255.0
root@sol-test-1:>/#ifconfig
e1000g2 inet 192.168.234.169 netmask + broadcast + up
Setting netmask of e1000g2 to 255.255.255.0
Inet for ip
netmask + & broadcast + means hey system, plz derive these values
from existing
up means after setting these values plz bring this interface online.
OK… IP HAS BEEN SET… n joy….
root@sol-test-1:>/#ifconfig -a
lo0:
flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232
index 1
inet 127.0.0.1 netmask
ff000000
e1000g0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu
1500 index 2
inet 192.168.234.133
netmask ffffff00 broadcast 192.168.234.255
ether 0:c:29:b:3:12
e1000g1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu
1500 index 3
inet 192.168.234.168
netmask ffffff00 broadcast 192.168.234.255
ether 0:c:29:b:3:1c
e1000g2: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu
1500 index 4
inet 192.168.234.169
netmask ffffff00 broadcast 192.168.234.255
ether 0:c:29:b:3:26
Now I told my boss and vendor that IP’s are assigned… vendor came and
installed the application and did the config…. Then reboot….
And BOOOOM…. All IP’s are gone…
OMG… I forgot to make them persistent,
So… before we did such mistake, let’s make it Permanent.
Make the entry of both IP’s in /etc/hosts
root@sol-test-1:>/#vi /etc/hosts
"/etc/hosts" [Read only] 6 lines, 97 characters
#
# Internet host table
#
::1 localhost
127.0.0.1 localhost
192.168.234.133 sol-test-1
loghost
192.168.234.168 sol-test-1
192.168.234.169 sol-test-1
:wq!
Crete following file and enter the ip address of that interface
#vi /etc/hostname.<name of interface>
root@sol-test-1:>/#vi /etc/hostname.e1000g1
"/etc/hostname.e1000g1" [New file]
192.168.234.168
:wq!
root@sol-test-1:>/#vi /etc/hostname.e1000g2
"/etc/hostname.e1000g2" [New file]
192.168.234.169
:wq!
Now RELAX…
Cont……
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