[SLL] Router config help needed

[Chuck Wolber]

On Tue, 19 Jun 2007, Ralph Sims wrote:

> I have set up a simple Linux router that I want to use to help test some 
> applications.  Is there a simple way to assign a full private address 
> block (176.16.0 /16) to eth0?

<CaptainObvious>
That's 65,535 IP addresses...
</>

Without knowing more about what you're trying to do, my instinct says that 
by looking at the problem in a different way, you'll probably find a 
better way to do what you need to do.


But... in the MythBuster spirit of wanting to blow stuff up for the sake 
of making shiny things go boom...


You *COULD* brute force it with virtual interfaces. It wouldn't be that 
hard assuming you had a dedicated box to do it with and the box didn't 
melt down due to some internal limitation.

A couple of nested "for loops" with this as the meat and potatoes:

ifconfig eth0:$i_num 176.16.$i.$j netmask 255.255.0.0

Where $i_num is a simple counter and $i is the counter from one for loop 
and $j is the counter from another (extra points if you can find the 
hidden potential bug).



> I need to be able to ping and traceroute to these addresses.  I can 
> break the /16 into subnets to get around any limitation to the number of 
> addresses I don't need to "route" these beyond the test box nor make 
> them publicly available beyond the lab.

Google doesn't seem to show any virtual interface limits, but then again, 
my google-foo may be a bit lacking...

..Chuck..




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