Question about netmask format

Question about netmask format

[Orion Poplawski]

The dracut.cmdline man page lists:

ip=<client-IP>:[<peer>]:<gateway-IP>:<netmask>:<client_hostname>:<interface>:
   {none|off|dhcp|on|any|dhcp6|auto6|ibft}[:[<dns1>][:<dns2>]]

for explicit (static) network configuration.  To my old mind, "netmask"
refers to something of the form 255.X.X.X.  However if I use that form with
EL7 or Fedora 20, it fails with a message like:

Bringing up interface eth0:  Error: an inet prefix is expected rather than
"10.8.0.0/255.255.255.0".

It works if I give it a CIDR suffix.  It appears that the netmask for used
to work.

- Orion

Re: Question about netmask format

[Harald Hoyer]

On 14.10.2014 00:23, Orion Poplawski wrote:
> The dracut.cmdline man page lists:
> 
> ip=<client-IP>:[<peer>]:<gateway-IP>:<netmask>:<client_hostname>:<interface>:
>    {none|off|dhcp|on|any|dhcp6|auto6|ibft}[:[<dns1>][:<dns2>]]
> 
> for explicit (static) network configuration.  To my old mind, "netmask"
> refers to something of the form 255.X.X.X.  However if I use that form with
> EL7 or Fedora 20, it fails with a message like:
> 
> Bringing up interface eth0:  Error: an inet prefix is expected rather than
> "10.8.0.0/255.255.255.0".
> 
> It works if I give it a CIDR suffix.  It appears that the netmask for used
> to work.
> 
> - Orion

Hmm, in my case

	"ip=192.168.50.101::192.168.50.1:255.255.255.0:iscsi-1:ens3:off"

results in:

ip addr flush dev ens3
ip addr add 192.168.50.101/255.255.255.0 brd + dev ens3
ip route replace default via 192.168.50.1 dev ens3
echo iscsi-1 > /proc/sys/kernel/hostname

Which works on my machine.

Re: Question about netmask format

[Orion Poplawski]

On 10/24/2014 01:08 AM, Harald Hoyer wrote:
> On 14.10.2014 00:23, Orion Poplawski wrote:
>> The dracut.cmdline man page lists:
>>
>> ip=<client-IP>:[<peer>]:<gateway-IP>:<netmask>:<client_hostname>:<interface>:
>>    {none|off|dhcp|on|any|dhcp6|auto6|ibft}[:[<dns1>][:<dns2>]]
>>
>> for explicit (static) network configuration.  To my old mind, "netmask"
>> refers to something of the form 255.X.X.X.  However if I use that form with
>> EL7 or Fedora 20, it fails with a message like:
>>
>> Bringing up interface eth0:  Error: an inet prefix is expected rather than
>> "10.8.0.0/255.255.255.0".
>>
>> It works if I give it a CIDR suffix.  It appears that the netmask for used
>> to work.
>>
>> - Orion
> 
> Hmm, in my case
> 
> 	"ip=192.168.50.101::192.168.50.1:255.255.255.0:iscsi-1:ens3:off"
> 
> results in:
> 
> ip addr flush dev ens3
> ip addr add 192.168.50.101/255.255.255.0 brd + dev ens3
> ip route replace default via 192.168.50.1 dev ens3
> echo iscsi-1 > /proc/sys/kernel/hostname
> 
> Which works on my machine.

My full (obsufscated) args are:

method=http://centos/7.0.1406/os/x86_64 ksdevice=eth0 lang= text net.ifnames=0
ks=http://cobbler/ks
ip=4.X.X.X::4.X.X.X:255.255.225.224:test.domain.com:eth0:none:10.10.10.1:10.10.10.2
kssendmac

No idea how to determine what commands were run as a result of this.

This is an anaconda install, so not sure what interaction there might be with
that.

Same result with F21, rawhide is uninstallable today so can try that.

-- 
Orion Poplawski
Technical Manager                     303-415-9701 x222
NWRA, Boulder/CoRA Office             FAX: 303-415-9702
3380 Mitchell Lane                       orion-CfuHcwXVrUc@public.gmane.org
Boulder, CO 80301                   http://www.nwra.com

Re: Question about netmask format

[Harald Hoyer]

On 31.10.2014 17:55, Orion Poplawski wrote:
> On 10/24/2014 01:08 AM, Harald Hoyer wrote:
>> On 14.10.2014 00:23, Orion Poplawski wrote:
>>> The dracut.cmdline man page lists:
>>>
>>> ip=<client-IP>:[<peer>]:<gateway-IP>:<netmask>:<client_hostname>:<interface>:
>>>    {none|off|dhcp|on|any|dhcp6|auto6|ibft}[:[<dns1>][:<dns2>]]
>>>
>>> for explicit (static) network configuration.  To my old mind, "netmask"
>>> refers to something of the form 255.X.X.X.  However if I use that form with
>>> EL7 or Fedora 20, it fails with a message like:
>>>
>>> Bringing up interface eth0:  Error: an inet prefix is expected rather than
>>> "10.8.0.0/255.255.255.0".
>>>
>>> It works if I give it a CIDR suffix.  It appears that the netmask for used
>>> to work.
>>>
>>> - Orion
>>
>> Hmm, in my case
>>
>> 	"ip=192.168.50.101::192.168.50.1:255.255.255.0:iscsi-1:ens3:off"
>>
>> results in:
>>
>> ip addr flush dev ens3
>> ip addr add 192.168.50.101/255.255.255.0 brd + dev ens3
>> ip route replace default via 192.168.50.1 dev ens3
>> echo iscsi-1 > /proc/sys/kernel/hostname
>>
>> Which works on my machine.
> 
> My full (obsufscated) args are:
> 
> method=http://centos/7.0.1406/os/x86_64 ksdevice=eth0 lang= text net.ifnames=0
> ks=http://cobbler/ks
> ip=4.X.X.X::4.X.X.X:255.255.225.224:test.domain.com:eth0:none:10.10.10.1:10.10.10.2
> kssendmac
> 
> No idea how to determine what commands were run as a result of this.
> 
> This is an anaconda install, so not sure what interaction there might be with
> that.
> 
> Same result with F21, rawhide is uninstallable today so can try that.
> 

add "rd.debug" to the kernel cmdline.

Then inspect /run/initramfs/rdsosreport.txt

Re: Question about netmask format

[Orion Poplawski]

On 11/03/2014 04:28 AM, Harald Hoyer wrote:
> 
> add "rd.debug" to the kernel cmdline.
> 
> Then inspect /run/initramfs/rdsosreport.txt
> 

Turns out I had 255.255.225.224 instead of 255.255.255.224.  Finally started
at it enough to catch it.  Sorry for the noise.

-- 
Orion Poplawski
Technical Manager                     303-415-9701 x222
NWRA, Boulder/CoRA Office             FAX: 303-415-9702
3380 Mitchell Lane                       orion-CfuHcwXVrUc@public.gmane.org
Boulder, CO 80301                   http://www.nwra.com