Re: [gentoo-server] Interesting IP Aliasing Problem

[Konstantin Astafjev <konstantin@astafjev.com>]

Hello M,

Monday, December 3, 2007, 8:46:58 PM, you wrote:
> I have a rather pressing issue with IP aliasing.  So, my ISP assigns IPs
> via dhcp using the MAC address to bind it statically.   What I need to
> do is get multiple static public IPs via their dhcp server.  My ISPs
> reliance on dhcp presents an interesting problem.  How am I to acquire
> multiple static public IPs from one NIC, say eth0, if their dhcp server
> requires a unique MAC address per IP?  I have tried using macchanger,
> but it doesn't work for aliases alone.  It changes the MAC for the main
> interface, eth0, not eth0:{0,N}.

If I'm not mistaken you have 3 options:

 - force your ISP make some static rules mac=some_IPs in their
   switches/routers. I guess they forcing clients to use DHCP because
   of "dhcp snooping" and "arp inspection" features helps them filter
   alien ips&macs.

 - take a simple switch and some NICs with different MACs.
   Quantity depends on how many IPs do you need. ;)

 - the craziest one: take vlan switch, on your NIC create some VLANs,
   change MAC address on each VLAN.

AFAIK, DHCP assigning a different IPs simultaneously on one MAC impossible.
   
-- 
Konstantin


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