10-23-2014
A network configuration file doesn't generally have the power to create a network device, just alter it. Take a closer look at eth4 and eth5 on those systems.
It's also possible that your systems have eth4/eth5, but aren't using them... If they're not "up", they wouldn't show in ifconfig. Try ifconfig -a to see if they appear.
As for what eth4/eth5 actually are, that's difficult to say without taking a look at them, examine them on one of the other systems, what are they connected to / doing, if anything?
9 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Hello,
I would like to know if there is a command or any configuration file to find and differentiate the Virtual IP Addresses (of the Cluster Resource Group) and the IP Address of the Cluster Node. I observe that the ifconfig -a command returns all the IP addresses configured on the ... (1 Reply)
Discussion started by: vineetd
1 Replies
2. Solaris
Do we have any Virtual Data Center software as we have Virtual Machine?
I want to practice everything of Solaris practically but i don't have resources like data center which includes Servers, Data storages, switches, and other things. (2 Replies)
Discussion started by: karman0931
2 Replies
3. Solaris
Hello All,
I have a requirement to add multiple virtual interfaces on a non-global zone (Solaris 10). The global zone is a 2 node Veritas Cluster Server. So, my question is do we have to make any modifications to the cluster config (which I think should not be the case)? Can anyone help with me... (11 Replies)
Discussion started by: mahive
11 Replies
4. UNIX for Dummies Questions & Answers
Not really a newbie, but I have a strange problem and I'm not sure how to further troubleshoot it.
I have to log out of a virtual terminal by typing exit, then exit again as in:
woodnt@toshiba-laptop ~ $ exit
logout
woodnt@toshiba-laptop ~ $ exit
logout
I DON'T have to do this when I'm... (1 Reply)
Discussion started by: Narnie
1 Replies
5. Linux
My setup consists of a hardware node, which hosts several virtual machines (OpenVZ, to be precise). The hardware node has two network interfaces (<ifA>, <ifB>) connected to different subnets (<networkA>, <networkB>). I want to route the traffic of certain VEs over <ifB> while routing the other VEs... (0 Replies)
Discussion started by: bakunin
0 Replies
6. Solaris
Trying to set or modify the randomly set hostID of a Solaris 10 virtual/guest machine that I installed on a Windows-XP host machine (using Virtual Box 4.1.12).
I was able to set/modify the hostname of the Solaris 10 virtual/guest machine during installation as well as via the Virtual Box... (4 Replies)
Discussion started by: Matt_VB
4 Replies
7. Solaris
Hi Al,
In course of understanding networking in Solaris, I have these doubts on Interfaces. Please clarify me. I have done fair research in this site and others but could not be clarified.
1. In the "ifconfig -a" command, I see many interfaces and their configurations. But I see many... (1 Reply)
Discussion started by: satish51392111
1 Replies
8. UNIX for Beginners Questions & Answers
Hi All,
Is there any way I can prioritize my VMs when there is resource crunch in host machine so that some VMs will be allocated more vcpu, more memory than other VMs in kvm/qemu hypervisor based virtual machines?
Lets say in my cloud environment my Ubuntu 16 compute hosts are running some... (0 Replies)
Discussion started by: SanjayK
0 Replies
9. UNIX for Beginners Questions & Answers
Hi,
I have RH Linux system on which we have a 10Gb nic card that we want to configure multiple Virtual interfaces that are all tagged on the switch side.
Here is what I am trying to do, I want to have clients from different vlans that are truncked to be able to communicate with my RHEL... (1 Reply)
Discussion started by: new2prog
1 Replies
ifup(8) ifup(8)
NAME
ifup - bring a network interface up
ifdown - take a network interface down
SYNOPSIS
ifup [-nv] [--no-act] [--verbose] [-i FILE|--interfaces=FILE] [--allow CLASS] -a|IFACE...
ifup -h|--help
ifup -V|--version
ifdown [-nv] [--no-act] [--verbose] [-i FILE|--interfaces=FILE] [--allow CLASS] -a|IFACE...
DESCRIPTION
The ifup and ifdown commands may be used to configure (or, respectively, deconfigure) network interfaces based on interface definitions in
the file /etc/network/interfaces.
OPTIONS
A summary of options is included below.
-a, --all
If given to ifup, affect all interfaces marked auto. Interfaces are brought up in the order in which they are defined in /etc/net-
work/interfaces. If given to ifdown, affect all defined interfaces. Interfaces are brought down in the order in which they are
currently listed in the state file. Only interfaces defined in /etc/network/interfaces will be brought down.
--force
Force configuration or deconfiguration of the interface.
-h, --help
Show summary of options.
--allow=CLASS
Only allow interfaces listed in an allow-CLASS line in /etc/network/interfaces to be acted upon.
-i FILE, --interfaces=FILE
Read interface definitions from FILE instead of from /etc/network/interfaces.
-e PATTERN, --exclude=PATTERN
Exclude interfaces from the list of interfaces to operate on by the PATTERN. Notice that the PATTERN can be a full interface name
or substrings that match interfaces. Users could easily have unexpected behaviour if they use a small string to do the match.
-n, --no-act
Don't configure any interfaces or run any "up" or "down" commands.
--no-mappings
Don't run any mappings. See interfaces(5) for more information about the mapping feature.
-V, --version
Show copyright and version information.
-v, --verbose
Show commands as they are executed.
EXAMPLES
ifup -a
Bring up all the interfaces defined with auto in /etc/network/interfaces
ifup eth0
Bring up interface eth0
ifup eth0=home
Bring up interface eth0 as logical interface home
ifdown -a
Bring down all interfaces that are currently up.
NOTES
ifup and ifdown are actually the same program called by different names.
The program does not configure network interfaces directly; it runs low level utilities such as ip to do its dirty work.
FILES
/etc/network/interfaces
definitions of network interfaces See interfaces(5) for more information.
/var/run/network/ifstate
current state of network interfaces
KNOWN BUGS
/LIMITATIONS
The program keeps records of whether network interfaces are up or down. Under exceptional circumstances these records can become inconsis-
tent with the real states of the interfaces. For example, an interface that was brought up using ifup and later deconfigured using ifcon-
fig will still be recorded as up. To fix this you can use the --force option to force ifup or ifdown to run configuration or deconfigura-
tion commands despite what it considers the current state of the interface to be.
The file /var/run/network/ifstate must be writable for ifup or ifdown to work properly. On Ubuntu the /var/run location is a temporary
filesystem which is always writable and thrown away on shutdown. You can also use the --force option to run configuration or deconfigura-
tion commands without updating the file.
Note that the program does not run automatically: ifup alone does not bring up interfaces that appear as a result of hardware being
installed and ifdown alone does not bring down interfaces that disappear as a result of hardware being removed. To automate the configura-
tion of network interfaces you need to install other packages such as hotplug(8) or ifplugd(8).
AUTHOR
The ifupdown suite was written by Anthony Towns <aj@azure.humbug.org.au>.
SEE ALSO
interfaces(5), ip(8), ifconfig(8).
IFUPDOWN
22 May 2004 ifup(8)