Managing Network Configuration Under Solaris 11

Network configuration in Oracle Solaris 11 works differently than in Oracle Solaris 10. This tutorial provides basic information about how to configure your network in this release.

Managing Network Configuration When in Manual Mode
Managing Network Configuration When in Automatic Mode

Managing Network Configuration When in Manual Mode

If you are manually configuring your network, keep the following key points in mind:

To manually configure the network by using the dladm and ipadm commands, the DefaultFixed NCP must be active (online) after the installation or upgrade. Use the netadm command to verify which NCP is currently active on your system. See Example 7-1. 

If the DefaultFixed NCP is not active, you will need to enable the profile before you can manually configure the network. See Example 7-2.

Persistent network configuration is now managed through SMF, not by editing the following files:
    • /etc/defaultdomain
    • /etc/dhcp.*
    • /etc/hostname.*
    • /etc/hostname.ip*.tun*
    • /etc/nodename
    • /etc/nsswitch.conf

Configuring Network Interfaces When in Manual Mode

The ipadm command is used to manually configure IP interfaces and addresses. For example, a static IPv4 interface is configured as follows:
# ipadm create-ip net0
# ipadm create-addr -T static -a local= net0/addr
The -T option can be used to specify three address types: static, dhcp, and addrconf (for auto-configured IPv6 addresses). In this example, the system is configured with a static IPv4 address. Use the same syntax to specify a static IPv6 address.

Configure an interface with DHCP as follows:

# ipadm create-ip net0
# ipadm create-addr -T dhcp net0/addr
Use the addrconf argument with the -T option to specify an automatically generated IPv6 address:

# ipadm create-ip net0
# ipadm create-addr -T addrconf net0/addr
If the net0 interface in this example was created, and you then wanted
to change the IP address that was provided for this interface, you would
need to first remove the interface and then re-add it:
# ipadm delete-ip net0
# ipadm create-ip net0
# ipadm create-addr -T addrconf net0/new-add

Displaying and Configuring Link Interfaces When in Manual Mode

Display information about the datalinks on a system as follows:  
# dladm show-phys
LINK              MEDIA                STATE      SPEED  DUPLEX    DEVICE
net2              Ethernet             up         10000  full      hxge0
net3              Ethernet             up         10000  full      hxge1
net4              Ethernet             up         10     full      usbecm0
net0              Ethernet             up         1000   full      igb0
net1              Ethernet             up         1000   full      igb1
net9              Ethernet             unknown    0      half      e1000g0
net5              Ethernet             unknown    0      half      e1000g1
net10             Ethernet             unknown    0      half      e1000g2
net11             Ethernet             unknown    0      half      e1000g3 
Display a datalink name, its device name, and its location in this
# dladm show-phys -L net0
LINK              DEVICE       LOC
net0              e1000g0      IOBD
Rename a datalink as follows:
If an IP interface is configured over the datalink, first remove that interface.

# ipadm delete-ip interface

Then, change the link's current name.

# dladm rename-link old-linkname new-linkname

Configuring Naming Services When in Manual Mode

The SMF repository is the primary repository for all naming services configuration. The previous behavior of modifying a configuration file to configure naming services no longer works. These services, for example, svc:/system/name-service/switch, svc:/network/dns/client, and svc:/system/name-service/cache must be enabled or refreshed for any changes to take affect.

Example 7-3 Configuring Naming Services by Using SMF

The following example shows how to configure DNS by using SMF commands.

# svccfg
svc:> select dns/client
svc:/network/dns/client> setprop config/search = astring: \
("" "" "" "" "" )
svc:/network/dns/client> setprop config/nameserver = net_address: \
( )
svc:/network/dns/client> select dns/client:default
svc:/network/dns/client:default> refresh
svc:/network/dns/client:default> validate
svc:/network/dns/client:default> select name-service/switch
svc:/system/name-service/switch> setprop config/host = astring: "files dns"
svc:/system/name-service/switch> select system/name-service/switch:default
svc:/system/name-service/switch:default> refresh
svc:/system/name-service/switch:default> validate
# svcadm enable dns/client
# svcadm refresh name-service/switch
# grep host /etc/nsswitch.conf
hosts:  files dns
# cat /etc/resolv.conf
# opyright (c) 2011, Oracle and/or its affiliates. All rights reserved.

# See resolv.conf(4) for details.

Example 7-4 Setting Multiple NIS Servers by Using SMF

The following example shows how to set multiple NIS servers.

# svccfg -s nis/domain setprop config/ypservers = host: ( 

Example 7-5 Setting Multiple DNS Options by Using SMF

The following example shows how to set multiple /etc/resolv.conf options.

# svccg
svc:> select /network/dns/client
svc:/network/dns/client> setprop config/options = "ndots:2,retrans:3,retry:1"
svc:/network/dns/client> listprop config/options
config/options astring     ndots:2,retrans:3,retry:1

# svcadm refresh dns/client
# grep options /etc/resolv.conf
options ndots:2,retrans:3,retry:1 

Temporarily Resetting SMF Naming Services

Reset configuration properties of an SMF naming service back to a files only mode as follows:

# /usr/sbin/nscfg unconfig name-service/switch 
# svcadm refresh name-service/switch

Importing Network Configuration

The nscfg command transfers legacy file configuration for the name-service switch components into the SMF repository. The command imports the legacy file, converting and pushing the configuration to SMF. For example:

# /usr/sbin/nscfg import -f FMRI

In this example, the nscfg command reads information in the /etc/resolv.conf file, converts it, then stores the information in the svc:/network/dns/client SMF service.

# /usr/sbin/nscfg import -f dns/client
If your system is running in files only mode, and no naming services have been configured or enabled, use the nscfg command to manually configure the system, as shown here:

# vi /etc/resolv.conf
# /usr/sbin/nscfg import -f dns/client
# cp /etc/nsswitch.dns /etc/nsswitch.conf
# /usr/sbin/nscfg import -f name-service/switch
# svcadm enable dns/client
# svcadm refresh name-service/switch

How to Use a Legacy nsswitch.conf File

When you change a system's naming service, you need to modify the name service switch information accordingly.
  1. Become an administrator.
  2. Copy the nsswitch.conf file to the new system.
  3. Load the information from the file into the SMF repository.
    # nscfg import -f svc:/system/name-service/switch:default
  4. Refresh the name service switch SMF service.
# svcadm refresh name-service/switch

Managing Network Configuration When in Automatic Mode

An NCP configures network links and interfaces. A Location configures system-wide network settings, for example naming services and IPfilter settings. NCPs are made up of individual configuration objects that are called Network Configuration Units (NCUs). Each NCU represents a physical link or an interface that includes the properties that define the configuration for that particular link or interface, as shown in the output of the netcfg list command in the following example:

netcfg> select ncp myncp
netcfg:ncp:myncp:ncu:nge0> list
    type                interface
    class               ip
    parent              "myncp"
    enabled             true
    ip-version          ipv4,ipv6
    ipv4-addrsrc        dhcp
    ipv6-addrsrc        dhcp,autoconf

User-defined NCPs and Locations are created by using the netcfg command, either in command-line mode or interactively. For example, you would create a new NCP called myncp by using the netcfg command interactively as follows:
$ netcfg
netcfg> create ncp myncp
You can configure network settings for an NCP when you create it, or you can configure or reconfigure network settings for an existing NCP by using the nefcfg select command either in command-line mode or interactively, as shown in the following example.  
Example 7-6 Configuring a Static IP Address for an existing NCP
In the following example, the netcfg command is used interactively to select the newly created NCP, myncp, then a static IP address is configured for this NCP.  
netcfg> select ncp myncp
netcfg:ncp:myncp:ncu:nge0> list
    type                interface
    class               ip
    parent              "myncp"
    enabled             true
    ip-version          ipv4,ipv6
    ipv4-addrsrc        dhcp
    ipv6-addrsrc        dhcp,autoconf
netcfg:ncp:myncp:ncu:nge0> set ipv4-addrsrc=static
netcfg:ncp:myncp:ncu:nge0> set ipv4-addr=
netcfg:ncp:myncp:ncu:nge0> set ipv4-default-route=
netcfg:ncp:myncp:ncu:nge0> end
Committed changes
Example 7-7 Enabling an NCP

In the following example, a user-defined NCP named myncp is enabled by using the netadm command.
$netadm enable -p myncp
Enabling ncp 'myncp'

Configuring Naming Services When in Automatic Mode

System-wide network configuration, for example, naming services configuration, is managed in the Location profile. Properties are configured by using the netcfg command. The Automatic Location profile allows the system to automatically configure naming services. The Automatic Location profile is used to configure DNS through DHCP only. Note that the Automatic Location is different than the Automatic NCP, which configures link and IP interfaces.

Before configuring naming service properties in a Location, you need to update the file that is to be referenced by the nameservices-config-file property of the specified Location. This file can be stored anywhere on the system. However, do not use the /etc/nsswitch.conf file name, as this file is overwritten.

$ netcfg
netcfg> create loc officeloc
Created loc 'officeloc'.  Walking properties ...
activation-mode (manual) [manual|conditional-any|conditional-all]> conditional-all
conditions> advertised-domain contains
nameservices (dns) [dns|files|nis|ldap]> nis
nameservices-config-file ("/etc/nsswitch.dns")> /etc/nsswitch.nis
nis-nameservice-configsrc [manual|dhcp]> dhcp
netcfg:loc:officeloc> end
Committed changes
In the following example NIS is configured for an existing location. 

$ netcfg> select loc origloc
netcfg:loc:origloc> set nameservices=dns,nis
netcfg:loc:origloc> set nis-nameservice-configsrc=manual
netcfg:loc:origloc> set nis-nameservice-servers=""
netcfg:loc:origloc> set default-domain=""
netcfg:loc:origloc> set nameservices-config-file="/etc/nsswitch.dns"
netcfg:loc:origloc> end
Committed changes
netcfg> exit
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