confused by netbase/udev

[Steffen Sledz <sledz@dresearch.de>]

I'm a bit confused about netbase and udev use im Angstrom.

Here's what i see:

I connect an USB-NIC.

/etc/udev/rules.d/70-persistent-net.rules is created:

 # This file was automatically generated by the /lib/udev/write_net_rules
 # program, run by the persistent-net-generator.rules rules file.
 #
 # You can modify it, as long as you keep each rule on a single
 # line, and change only the value of the NAME= key.

 # USB device 0x:0x (MOSCHIP usb-ethernet driver)
 SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:13:3b:04:02:ae", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

But the NIC is not comming up (no ip assigned via DHCP). :(

I disconnect the USB-NIC and reboot.

/etc/udev/rules.d/70-persistent-net.rules still exists with
the mentioned content. Why?

I connect another USB-NIC.

/etc/udev/rules.d/70-persistent-net.rules is extended:

 # This file was automatically generated by the /lib/udev/write_net_rules
 # program, run by the persistent-net-generator.rules rules file.
 #
 # You can modify it, as long as you keep each rule on a single
 # line, and change only the value of the NAME= key.

 # USB device 0x:0x (MOSCHIP usb-ethernet driver)
 SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:13:3b:04:02:ae", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

 # USB device 0x:0x (pegasus)
 SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:00:e8:00:0f:e0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth2"

This NIC is also not coming up. :(

And for each new NIC another name is created?! :(

And here's what i like to see:
* Connect an USB-NIC should result in an DHCP-configured interface.
* Disconnect the USB-NIC remove all traces from the system.

Hope you can clear the mist in my head.

Steffen