Ubuntu network sometimes cannot be detected in installer

[UTMDiscordBot]

Sometimes the interface shows as down in the installer. But even if i go sett it to use DHCP, most often in these cases, it simply will not get an IP. But this behavior is in no way consistent.

Created using UTMbot

Questioner: jorn#2510
Moderator: ktprograms#2418

[UTMDiscordBot]

Sometimes killing VM, cycling the MAC, and trying again works. But i have <50% success with that.

Added comment using UTMbot

Questioner: jorn#2510
Moderator: ktprograms#2418

[ktprograms]

Here's the list of starting octet and success/fail with the Ubuntu server installer:

Octet	Ok
F3	N
EB	N
77	N
D3	N
F0	Y
D6	Y
F4	Y
92	Y
CD	N
CC	Y
55	N
8F	N
92	Y

Results:

• UTM doesn't constrain MAC addresses to Locally administrated Unicast.
• Ubuntu installer breaks if the MAC address is Multicast.

[ktprograms]

Re-adding this line of code (translated to swift) should fix it:

UTM/Configuration/UTMQemuConfiguration+Networking.m

Line 82 in 16d0710

bytes[0] = (bytes[0] & 0xFC) | 0x2;