[lug] Fedora 16 and network alias

[Kevin Fenzi]

On Fri, 2 Mar 2012 20:13:07 +0000 (UTC)
stimits at comcast.net wrote:

> Hi,
> 
> It looks like around Fedora 15, several changes were made to
> administrative configurations...lots of /etc/ changes. One change was
> to use the bios naming to produce network interface names like "em1"
> instead of "eth0", others were changes in CUPS file layout.

yeah: 
http://fedoraproject.org/wiki/Features/ConsistentNetworkDeviceNaming

> For the ethernet side, I don't mind using em1 versus eth0, though I
> see it has caused a number of people to have to rewrite scripts.
> However, I need to create a static alias for non-public internal
> networking, and although there are web pages which show
> aliases/second-IP should work via something similar to this
> in /etc/sysconfig/network-scripts/ifcfg-em1:0, the scripting is
> completely ignored:
> 
> <CODE SNIPPET>
>    IPADDR="192.168.1.2"
>    NETMASK="255.255.255.0"
>    NETWORK="192.168.1.0"
>    BROADCAST="192.168.1.255"
>    BOOTPROTO="static"
>    DEVICE="em1:0"
>    TYPE="Ethernet"
>    ONBOOT="yes"
> </CODE SNIPPET>
> (OT: Wish I had a patent on the word "snippet"...or better yet, a
> copyright on bugs...I'd sure be rich...let the guy with ownership of
> "1" and "0" be jealous :P )
> 
> Even with proper permissions, and network restart, no alias ever shows
> up. If I specifically use ifconfig on any alias name, whether it has
> a script or not, e.g., "ifconfig em1:25", it shows up without error,
> but unconfigured, like this:
> 
> em1:0     Link encap:Ethernet  HWaddr aa:bb:cc:dd:ee:ff  
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           Interrupt:41 Base address:0x8000 
> ...HWaddr edited, but it is the valid MAC in the real output.
> 
> Does anyone here know why Fedora 16 ignores a valid alias file? This
> install is a fairly normal installation for a developer, and kept up
> to date.

Well, are they using the old 'network' service (not default) or
NetworkManager (default now)?

Does a 'ifup em1:0' work to bring it up?

You may need a: 

NM_CONTROLLED=yes
(or no if you are using network). 

kevin

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