Linux, adding sub-interfaces

I'll start out by saying networking isn't my strong suit, I'm trying to configure a few sub-interfaces so that some code I am working will have more sockets to locally bind to. So far i've done the following, I can locally bind to my sub interface 192.168.2.210, but I can not make a remote connection with it.

Here is my ifconfig:

eth0      Link encap:Ethernet  HWaddr 00:50:56:BB:00:0B  
          inet addr:10.6.19.18  Bcast:10.255.255.255  Mask:255.255.255.0
          inet6 addr: fe80::250:56ff:febb:b/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1056026 errors:0 dropped:0 overruns:0 frame:0
          TX packets:638290 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:237037186 (226.0 MiB)  TX bytes:126161362 (120.3 MiB)

eth0:1    Link encap:Ethernet  HWaddr 00:50:56:BB:00:0B  
          inet addr:192.168.2.210  Bcast:192.168.2.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

Here is what i've tried to do to configure eth0:1

ifconfig eth0:1 192.168.2.210/32 up
ip route add 192.168.2.210/32 via 10.6.19.18

Here is my netstat -r output:

192.168.2.210   devserv.        255.255.255.255 UGH       0 0          0 eth0
192.168.2.0     *               255.255.255.0   U         0 0          0 eth0
10.6.19.0       *               255.255.255.0   U         0 0          0 eth0
link-local      *               255.255.0.0     U         0 0          0 eth0
default         10.6.19.1       0.0.0.0         UG        0 0          0 eth0

Any thoughts? Thanks for looking

Ditch ifconfig as this is being phased out for the iproute2 package;

root@bensley-n2:~# ip address show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
    link/ether 00:e0:4c:6d:0a:49 brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether 74:ea:3a:ad:2e:00 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.5/24 brd 192.168.0.255 scope global wlan0
    inet6 fe80::76ea:3aff:fead:2e00/64 scope link 
       valid_lft forever preferred_lft forever
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN 
    link/ether ce:70:78:f8:10:75 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
root@bensley-n2:~# ip address add 1.1.1.1/24 dev wlan0
root@bensley-n2:~# ip address show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
    link/ether 00:e0:4c:6d:0a:49 brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether 74:ea:3a:ad:2e:00 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.5/24 brd 192.168.0.255 scope global wlan0
    inet 1.1.1.1/24 scope global wlan0
    inet6 fe80::76ea:3aff:fead:2e00/64 scope link 
       valid_lft forever preferred_lft forever
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN 
    link/ether ce:70:78:f8:10:75 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
root@bensley-n2:~# ip route show
default via 192.168.0.1 dev wlan0 
1.1.1.0/24 dev wlan0  proto kernel  scope link  src 1.1.1.1 
192.168.0.0/24 dev wlan0  proto kernel  scope link  src 192.168.0.5 
192.168.122.0/24 dev virbr0  proto kernel  scope link  src 192.168.122.1

(You can abbreviate the ip commands: ip address add can be shortened all the way down to ip a a, and ip address show can be shortened to ip a s. show is the default action if you don't specify the second argument, so you can just type ip a if you want to be really terse.)

You don't need to add a route either for a local subnet.

Firstly, sockets aren't actually bound to an interface -- they're bound to an IP address. Virtual/alias interfaces are deprecated and should be avoided -- you should rather add multiple IP addresses directly to eth0. Secondly, if you want these addresses to be routable on the local network you need to use addresses on that network (i.e. 10.6.19.0/24) and not a machine-local subnet like 192.168.2.0/24 (unless you can get the router or the remote machines reconfigured with this other subnet). To add additional address, use the following command:

ip addr add 10.6.19.19/24 dev bond0

You shouldn't require any additional routing configuration since the addresses are on an existing subnet.

Linux, adding sub-interfaces

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