New vlan and ip

Question

Hi,

I was wondering if there is a way for me to create the vlan below with IP address on the 2nd and 3rd octet of the existing IP subnet on my router.  I have a few of these to do and wondering if there's a script or something out there for it.

interface Vlan4
 description GAS
 ip address 10.x.y.129 255.255.255.248
 no ip redirects
 no ip proxy-arp
 ip nat inside
 ip virtual-reassembly
exit

Thanks!

Yann · Answer

Here is quick example, feel free to modify the for loop conditions to create the specified VLANs you need.

#!/usr/bin/perl
for ($x = 0; $x < 256; $x++) {
        for ($y = 0; $y < 256; $y++) {
                print "interface Vlan$x-$y
";
                print " description GAS
";
                print " ip address 10.$x.$y.129 255.255.255.248
";
                print " no ip redirects
";
                print " no ip proxy-arp
";
                print " ip nat inside
";
                print " ip virtual-reassembly
";
                print "exit
";
        }
}

Felix29 · Answer

Would you happen to have an example of the perl script that does this?

Yann · Answer

Hi,

In you situation, I would write a perl script with a for loop that prints the commands to a text file .

Once you have your text file, send the commands to the router either using NCM or pasting the commands directly on the router.

There might be a faster solution but this is the one I would first think about.

HTH,

Yann