[lug] how many ways to get 2 IP on 1 NIC?

[Mark Horning]

D. Stimits wrote:

> I thought this would be simple, but I am having problems finding the 
> answer. I was under the impression that a single NIC can have two IP 
> addresses (versus 2 NICs on one machine). If I wanted to assign two IP 
> addresses with two netmasks, how could I do that manually (e.g., ip, 
> ifconfig, route)?
>
> D. Stimits, stimits AT attbi.com
>
[root at telecaster root]# ifconfig eth0:1 192.168.1.11 netmask 255.255.255.0 broadcast 192.168.1.255 up


[root at telecaster root]# ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:01:02:C2:56:A1  
          inet addr:192.168.1.10  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2402649 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1557258 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100 
          RX bytes:3427586863 (3268.8 Mb)  TX bytes:104958295 (100.0 Mb)
          Interrupt:12 Base address:0xdc00 

eth0:1    Link encap:Ethernet  HWaddr 00:01:02:C2:56:A1  
          inet addr:192.168.1.11  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Interrupt:12 Base address:0xdc00 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:11295 errors:0 dropped:0 overruns:0 frame:0
          TX packets:11295 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:1089324 (1.0 Mb)  TX bytes:1089324 (1.0 Mb)

--

Mark Horning
rip6 at rip6.net