Re: [opensuse] Easter Puzzle[2] - two virtually identical systems, only on one do the interfaces get assigned broadcast addresses

24.03.2016 17:05, Per Jessen пишет:

I really try hard to entertain everyone :-), but this morning's puzzle didn't last long ...

How about this one instead -

I have two virtually identical systems, both xen DomUs, hosted on the same xen host. Both are openSUSE 13.2, one is kernel-3.16.7-35, the other kernel-3.16.7-24.

On system A I have eth0:

2: eth0: mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000 link/ether 00:16:3e:a3:22:47 brd ff:ff:ff:ff:ff:ff inet 192.168.2.144/21 brd 192.168.7.255 scope global eth0 valid_lft forever preferred_lft forever inet6 fe80::216:3eff:fea3:2247/64 scope link valid_lft forever preferred_lft forever

# cat /etc/sysconfig/network/ifcfg-eth0 BOOTPROTO='static' STARTMODE='auto' NAME='Virtual Interface 0' BROADCAST='' ETHTOOL_OPTIONS='' IPADDR='192.168.2.144/21'

As you can tell, a broadcast address was assigned (apparently automatically).

System B, eth0:

2: eth0: mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000 link/ether 7a:11:a2:12:35:22 brd ff:ff:ff:ff:ff:ff inet 192.168.2.106/21 scope global eth0 valid_lft forever preferred_lft forever inet6 fe80::7811:a2ff:fe12:3522/64 scope link valid_lft forever preferred_lft forever

# cat /etc/sysconfig/network/ifcfg-eth0 BOOTPROTO='static' BROADCAST='' ETHTOOL_OPTIONS='' IPADDR='192.168.2.106/21' MTU='' NAME='Virtual Ethernet Card 0' NETWORK='' REMOTE_IPADDR='' STARTMODE='auto'

Why doesn't system B get a broadcast address assigned?

As a wild guess - the first system has globally unique and the second - locally administered MAC address. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org