I'm running into this curious problem.  I start a uml (LFS base system)
with only one interface, lo:

uml2 # ip link ls
1: lo: <LOOPBACK,UP,10000> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

Then using uml_mconsole I add a eth device:

host: uml_mconsole uml2 config eth0=mcast

uml2 # Configured mcast device: 239.192.168.1:1102-1
Choosing a random ethernet address for device eth0
Netdevice 0 (f2:11:f9:d7:7b:23) : mcast backend multicast address: 
239.192.168.1:1102, TTL:1

So far, it looks all right.

But then, there's no eth0 device in the uml, but an eth4 instead:

uml2 # ip link ls
1: lo: <LOOPBACK,UP,10000> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth4: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000
    link/ether f2:11:f9:d7:7b:23 brd ff:ff:ff:ff:ff:ff

What would the uml kernel intepret differently the uml_mconsole
parameter ?  Any advice appreciated - thanks.

Al

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