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ifconfig - configure network interface parameters
ifconfig interface [address_family] [address [/prefix_length] [dest_address]] [addif address [/prefix_length]] [removeif address [/prefix_length]] [arp | -arp] [auth_algs authentication algorithm] [encr_algs encryption algorithm] [encr_auth_algs authentication algorithm] [auto-revarp] [broadcast address] [deprecated | -deprecated] [preferred | -preferred] [destination dest_address] [ether [address]] [failover | -failover] [group [name | ""]] [index if_index] [metric n] [modlist] [modinsert mod_name@pos] [modremove mod_name@pos] [mtu n] [netmask mask] [plumb] [unplumb] [private | -private] [nud | -nud] [set [address] [/netmask]] [standby | -standby] [subnet subnet_address] [tdst tunnel_dest_address] [token address/prefix_length] [tsrc tunnel_src_address] [trailers | -trailers] [up] [down] [usesrc [name | none]] [xmit | -xmit] [encaplimit n | -encaplimit] [thoplimit n] [router | -router] [zone zonename | -zone | -all-zones]
ifconfig [address_family] interface {auto-dhcp | dhcp} [primary]
[wait seconds] drop | extend | inform | ping
| release | start | status
The command ifconfig is used to assign an address to a network interface and to configure network interface parameters. The ifconfig command must be used at boot time to define the network address of each interface present on a machine; it may also be used at a later time to redefine an interface's address or other operating parameters. If no option is specified, ifconfig displays the current configuration for a network interface. If an address family is specified, ifconfig reports only the details specific to that address family. Only privileged users may modify the configuration of a network interface. Options appearing within braces ({}) indicate that one of the options must be specified.
The forms of ifconfig that use the auto-dhcp or dhcp arguments are used to control the Dynamic Host Configuration Protocol ("DHCP") configuration of the interface. In this mode, ifconfig is used to control operation of dhcpagent(1M), the DHCP client daemon. Once an interface is placed under DHCP control by using the start operand, ifconfig should not, in normal operation, be used to modify the address or characteristics of the interface. If the address of an interface under DHCP is changed, dhcpagent will remove the interface from its control.
The following options are supported:
addif address
all-zones
The tnzonecfg database is described in the tnzonecfg(4) man page, which is part of the Solaris Trusted Extensions Reference Manual.
anycast
-anycast
arp
-arp
auth_algs authentication algorithm
It is now preferable to use the ipsecconf(1M) command when configuring a tunnel's security properties. If ipsecconf was used to set a tunnel's security properties, this keyword will not affect the tunnel.
auto-dhcp
For IPv6, the interface specified must be the zeroth logical interface (the physical interface name), which has the link-local address.
primary
wait seconds
drop
extend
inform
ping
release
start
status
auto-revarp
broadcast address
example% ifconfig -a netmask + broadcast +
and
example% ifconfig -a broadcast + netmask +
may result in different values being assigned for the broadcast addresses of the interfaces.
deprecated
-deprecated
preferred
-preferred
destination dest_address
dhcp
down
When a logical interface is down, all routes that specify that interface as the output (using the -ifp option in the route(1M) command or RTA_IFP in a route(7P) socket) are removed from the forwarding table. Routes marked with RTF_STATIC are returned to the table if the interface is brought back up, while routes not marked with RTF_STATIC are simply deleted.
When all logical interfaces that could possibly be used to reach a particular gateway address are brought down (specified without the interface option as in the previous paragraph), the affected gateway routes are treated as though they had the RTF_BLACKHOLE flag set. All matching packets are discarded because the gateway is unreachable.
encaplimit n
-encaplimit
encr_auth_algs authentication algorithm
It is now preferable to use the ipsecconf(1M) command when configuring a tunnel's security properties. If ipsecconf was used to set a tunnel's security properties, this keyword will not affect the tunnel.
encr_algs encryption algorithm
It is now preferable to use the ipsecconf(1M) command when configuring a tunnel's security properties. If ipsecconf was used to set a tunnel's security properties, this keyword will not affect the tunnel.
ether [ address ]
Otherwise, if the user is root or has sufficient privileges, set the Ethernet address of the interfaces to address. The address is an Ethernet address represented as x:x:x:x:x:x where x is a hexadecimal number between 0 and FF. Similarly, for the IPoIB (IP over InfiniBand) interfaces, the address will be 20 bytes of colon-separated hex numbers between 0 and FF.
Some, though not all, Ethernet interface cards have their own addresses. To use cards that do not have their own addresses, refer to section 3.2.3(4) of the IEEE 802.3 specification for a definition of the locally administered address space. The use of multipathing groups should be restricted to those cards with their own addresses (see MULTIPATHING GROUPS).
-failover
failover
group [ name |""]
index n
metric n
modinsert mod_name@pos
Based upon the example in the modlist option, use the following command to insert a module with name ipqos under the ip module and above the firewall module:
example% ifconfig eri0 modinsert ipqos@2
A subsequent listing of all the modules in the stream of the device follows:
example% ifconfig eri0 modlist 0 arp 1 ip 2 ipqos 3 firewall 4 eri
modlist
The following example lists all the modules in the stream of the device:
example% ifconfig eri0 modlist 0 arp 1 ip 2 firewall 4 eri
modremove mod_name@pos
Based upon the example in the modinsert option, use the following command to remove the firewall module from the stream after inserting the ipqos module:
example% ifconfig eri0 modremove firewall@3
A subsequent listing of all the modules in the stream of the device follows:
example% ifconfig eri0 modlist 0 arp 1 ip 2 ipqos 3 eri
Note that the core IP stack modules, for example, ip and tun modules, cannot be removed.
mtu n
netmask mask
If a pseudo host name/pseudo network name is supplied as the netmask value, netmask data may be located in the hosts or networks database. Names are looked up by first using gethostbyname(3NSL). If not found there, the names are looked up in getnetbyname(3SOCKET). These interfaces may in turn use nsswitch.conf(4) to determine what data store(s) to use to fetch the actual value.
For both inet and inet6, the same information conveyed by mask can be specified as a prefix_length attached to the address parameter.
nud
-nud
plumb
Before an interface has been plumbed, the interface will not show up in the output of the ifconfig -a command.
private
-private
removeif address
router
-router
set
standby
The status display shows "STANDBY, INACTIVE" indicating that that the interface is a standby and is also inactive. IFF_INACTIVE will be cleared when some other interface belonging to the same multipathing group fails over to this interface. Once a failback happens, the status display will return to INACTIVE.
-standby
subnet
tdst tunnel_dest_address
thoplimit n
token address/prefix_length
example% ifconfig eri0 inet6 token ::1/64
trailers
-trailers
tsrc tunnel_src_address
unplumb
up
usesrc [ name | none ]
When an application does not choose a non-zero source address using bind(3SOCKET), the system will select an appropriate source address based on the outbound interface and the address selection rules (see ipaddrsel(1M)).
When usesrc is specified and the specified interface is selected in the forwarding table for output, the system looks first to the specified physical interface and its associated logical interfaces when selecting a source address. If no usable address is listed in the forwarding table, the ordinary selection rules apply. For example, if you enter:
# ifconfig eri0 usesrc vni0
...and vni0 has address 10.0.0.1 assigned to it, the system will prefer 10.0.0.1 as the source address for any packets originated by local connections that are sent through eri0. Further examples are provided in the EXAMPLES section.
While you can specify any physical interface (or even loopback), be aware that you can also specify the virtual IP interface (see vni(7D)). The virtual IP interface is not associated with any physical hardware and is thus immune to hardware failures. You can specify any number of physical interfaces to use the source address hosted on a single virtual interface. This simplifies the configuration of routing-based multipathing. If one of the physical interfaces were to fail, communication would continue through one of the remaining, functioning physical interfaces. This scenario assumes that the reachability of the address hosted on the virtual interface is advertised in some manner, for example, through a routing protocol.
Because the ifconfig preferred option is applied to all interfaces, it is coarser-grained than the usesrc option. It will be overridden by usesrc and setsrc (route subcommand), in that order.
The use of the usesrc option is mutually exclusive of the IP multipathing ifconfig options, group and standby. That is, if an interface is already part of a IP multipathing group or specified as a standby interface, then it cannot be specified with a usesrc option, and vice-versa. For more details on IP multipathing, see in.mpathd(1M) and the .
xmit
-xmit
zone zonename
-zone
The interface operand, as well as address parameters that affect it, are described below.
interface
-a
-d
-D
-u
-Z
-4
-6
address_family
ifconfig honors the DEFAULT_IP setting in the /etc/default/inet_type file when it displays interface information . If DEFAULT_IP is set to IP_VERSION4, then ifconfig will omit information that relates to IPv6 interfaces. However, when you explicitly specify an address family (inet or inet6) on the ifconfig command line, the command line overrides the DEFAULT_IP settings.
address
For the IPv6 family (inet6), the address is either a host name present in the host name data base (see hosts(4)) or in the Network Information Service (NIS) map ipnode, or an IPv6 address expressed in the Internet standard colon-separated hexadecimal format represented as x:x:x:x:x:x:x:x where x is a hexadecimal number between 0 and FFFF.
prefix_length
dest_address
tunnel_dest_address
tunnel_src_address
The ifconfig command supports the following interface flags. The term "address" in this context refers to a logical interface, for example, eri0:0, while "interface " refers to the physical interface, for example, eri0.
ADDRCONF
ANYCAST
BROADCAST
CoS
DEPRECATED
DHCP
DUPLICATE
FAILED
FIXEDMTU
INACTIVE
LOOPBACK
MULTI_BCAST
MULTICAST
NOARP
NOFAILOVER
NOLOCAL
NONUD
NORTEXCH
NOXMIT
OFFLINE
POINTOPOINT
PREFERRED
PRIVATE
ROUTER
RUNNING
STANDBY
TEMPORARY
UNNUMBERED
UP
VIRTUAL
XRESOLV
Solaris TCP/IP allows multiple logical interfaces to be associated with a physical network interface. This allows a single machine to be assigned multiple IP addresses, even though it may have only one network interface. Physical network interfaces have names of the form driver-name physical-unit-number, while logical interfaces have names of the form driver-name physical-unit-number:logical-unit-number. A physical interface is configured into the system using the plumb command. For example:
example% ifconfig eri0 plumb
Once a physical interface has been "plumbed", logical interfaces associated with the physical interface can be configured by separate -plumb or -addif options to the ifconfig command.
example% ifconfig eri0:1 plumb
allocates a specific logical interface associated with the physical interface eri0. The command
example% ifconfig eri0 addif 192.168.200.1/24 up
allocates the next available logical unit number on the eri0 physical interface and assigns an address and prefix_length.
A logical interface can be configured with parameters ( address,prefix_length, and so on) different from the physical interface with which it is associated. Logical interfaces that are associated with the same physical interface can be given different parameters as well. Each logical interface must be associated with an existing and "up" physical interface. So, for example, the logical interface eri0:1 can only be configured after the physical interface eri0 has been plumbed.
To delete a logical interface, use the -unplumb or -removeif options. For example,
example% ifconfig eri0:1 down unplumb
will delete the logical interface eri0:1.
Physical interfaces that share the same IP broadcast domain can be collected into a multipathing group using the group keyword. Interfaces assigned to the same multipathing group are treated as equivalent and outgoing traffic is spread across the interfaces on a per-IP-destination basis. In addition, individual interfaces in a multipathing group are monitored for failures; the addresses associated with failed interfaces are automatically transferred to other functioning interfaces within the group.
For more details on IP multipathing, see in.mpathd(1M) and the . See netstat(1M) for per-IP-destination information.
When an IPv6 physical interface is plumbed and configured "up" with ifconfig, it is automatically assigned an IPv6 link-local address for which the last 64 bits are calculated from the MAC address of the interface.
example% ifconfig eri0 inet6 plumb up
The following example shows that the link-local address has a prefix of fe80::/10.
example% ifconfig eri0 inet6
ce0: flags=2000841<UP,RUNNING,MULTICAST,IPv6>
mtu 1500 index 2
inet6 fe80::a00:20ff:fe8e:f3ad/10
Link-local addresses are only used for communication on the local subnet and are not visible to other subnets.
If an advertising IPv6 router exists on the link advertising prefixes, then the newly plumbed IPv6 interface will autoconfigure logical interface(s) depending on the prefix advertisements. For example, for the prefix advertisement 2001:0db8:3c4d:0:55::/64, the autoconfigured interface will look like:
eri0:2: flags=2080841<UP,RUNNING,MULTICAST,ADDRCONF,IPv6>
mtu 1500 index 2
inet6 2001:0db8:3c4d:55:a00:20ff:fe8e:f3ad/64
Even if there are no prefix advertisements on the link, you can still assign global addresses manually, for example:
example% ifconfig eri0 inet6 addif \ 2001:0db8:3c4d:55:a00:20ff:fe8e:f3ad/64 up
To configure boot-time defaults for the interface eri0, place the following entry in the /etc/hostname6.eri0 file:
addif 2001:0db8:3c4d:55:a00:20ff:fe8e:f3ad/64 up
An IPv6 over IPv4 tunnel interface can send and receive IPv6 packets encapsulated in an IPv4 packet. Create tunnels at both ends pointing to each other. IPv6 over IPv4 tunnels require the tunnel source and tunnel destination IPv4 and IPv6 addresses. Solaris 8 supports both automatic and configured tunnels. For automatic tunnels, an IPv4-compatible IPv6 address is used. The following demonstrates auto-tunnel configuration:
example% ifconfig ip.atun0 inet6 plumb example% ifconfig ip.atun0 inet6 tsrc IPv4-address \ ::IPv4 address/96 up
where IPv4-address is the IPv4 address of the interface through which the tunnel traffic will flow, and IPv4-address, ::<IPv4-address>, is the corresponding IPv4-compatible IPv6 address.
The following is an example of a configured tunnel:
example% ifconfig ip.tun0 inet6 plumb tsrc my-ipv4-address \ tdst peer-ipv4-address up
This creates a configured tunnel between my-ipv4-address and peer-ipv4-address with corresponding link-local addresses. For tunnels with global or site-local addresses, the logical tunnel interfaces need to be configured in the following form:
example% ifconfig ip.tun0 inet6 addif my-v6-address peer-v6-address up
For example,
example% ifconfig ip.tun0 inet6 plumb tsrc 109.146.85.57 \ tdst 109.146.85.212 up example% ifconfig ip.tun0 inet6 addif 2::45 2::46 up
To show all IPv6 interfaces that are up and configured:
example% ifconfig -au6
ip.tun0: flags=2200851<UP,POINTOPOINT,RUNNING,MULTICAST,NONUD,IPv6>
mtu 1480 index 3
inet tunnel src 109.146.85.57 tunnel dst 109.146.85.212
tunnel security settings --> use 'ipsecconf -ln -i ip.tun1'
tunnel hop limit 60
inet6 fe80::6d92:5539/10 --> fe80::6d92:55d4
ip.tun0:1: flags=2200851<UP,POINTOPOINT,RUNNING,MULTICAST,NONUD,IPv6>
mtu 1480 index 3
inet6 2::45/128 --> 2::46
In the output above, note the line that begins with "tunnel security settings". The content of this line varies according to whether and how you have set your security settings. See "Display of Tunnel Security Settings," below.
An IPv4 over IPv6 tunnel interface can send and receive IPv4 packets encapsulated in an IPv6 packet. Create tunnels at both ends pointing to each other. IPv4 over IPv6 tunnels require the tunnel source and tunnel destination IPv6 and IPv4 addresses. The following demonstrates auto-tunnel configuration:
example% ifconfig ip6.tun0 inet plumb tsrc my-ipv6-address \ tdst peer-ipv6-address my-ipv4-address \ peer-ipv4-address up
This creates a configured tunnel between my-ipv6-address and peer-ipv6-address with my-ipv4-address and peer-ipv4-address as the endpoints of the point-to-point interface, for example:
example% ifconfig ip6.tun0 inet plumb tsrc fe80::1 tdst fe80::2 \ 10.0.0.208 10.0.0.210 up
To show all IPv4 interfaces that are up and configured:
example% ifconfig -au4
lo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1
inet 127.0.0.1 netmask ff000000
eri0: flags=1004843<UP,BROADCAST,RUNNING,MULTICAST,DHCP,IPv4> mtu 1500 \
index 2
inet 172.17.128.208 netmask ffffff00 broadcast 172.17.128.255
ip6.tun0: flags=10008d1<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST,IPv4> \
mtu 1460
index 3
inet6 tunnel src fe80::1 tunnel dst fe80::2
tunnel security settings --> use 'ipsecconf -ln -i ip.tun1'
tunnel hop limit 60 tunnel encapsulation limit 4
inet 10.0.0.208 --> 10.0.0.210 netmask ff000000
In the output above, note the line that begins with "tunnel security settings". The content of this line varies according to whether and how you have set your security settings. See "Display of Tunnel Security Settings," below.
The ifconfig output for tunneled interfaces indicates security settings, if present, for a tunnel. The content of the line showing your settings differs depending on how you have made your settings:
tunnel security settings --> use 'ipsecconf -ln -i ip.tun1'
...in effect, hiding your settings from those without privileges to view them.
If you do net set security policy, using either ifconfig or ipsecconf, there is no tunnel security setting displayed.
Example 1 Using the ifconfig Command
If your workstation is not attached to an Ethernet, the network interface, for example, eri0, should be marked "down" as follows:
example% ifconfig eri0 down
Example 2 Printing Addressing Information
To print out the addressing information for each interface, use the following command:
example% ifconfig -a
Example 3 Resetting the Broadcast Address
To reset each interface's broadcast address after the netmasks have been correctly set, use the next command:
example% ifconfig -a broadcast +
Example 4 Changing the Ethernet Address
To change the Ethernet address for interface ce0, use the following command:
example% ifconfig ce0 ether aa:1:2:3:4:5
Example 5 Configuring an IP-in-IP Tunnel
To configure an IP-in-IP tunnel, first plumb it with the following command:
example% ifconfig ip.tun0 plumb
Then configure it as a point-to-point interface, supplying the tunnel source and the tunnel destination:
example% ifconfig ip.tun0 myaddr mydestaddr tsrc another_myaddr \
tdst a_dest_addr up
Use ipsecconf(1M), as described above, to configure tunnel security properties.
Example 6 Configuring 6to4 Tunnels
To configure 6to4 tunnels, use the following commands:
example% ifconfig ip.6to4tun0 inet6 plumb example% ifconfig ip.6to4tun0 inet6 tsrc IPv4-address 6to4-address/64 up
IPv4-address denotes the address of the encapsulating interface. 6to4-address denotes the address of the local IPv6 address of form 2002:IPv4-address:SUBNET-ID:HOSTID.
The long form should be used to resolve any potential conflicts that might arise if the system administrator utilizes an addressing plan where the values for SUBNET-ID or HOSTID are reserved for something else.
After the interface is plumbed, a 6to4 tunnel can be configured as follows:
example% ifconfig ip.6to4tun0 inet6 tsrc IPv4-address up
This short form sets the address. It uses the convention:
2002:IPv4-address::1
The SUBNET-ID is 0, and the HOSTID is 1.
Example 7 Configuring IP Forwarding on an Interface
To enable IP forwarding on a single interface, use the following command:
example% ifconfig eri0 router
To disable IP forwarding on a single interface, use the following command:
example% ifconfig eri0 -router
Example 8 Configuring Source Address Selection Using a Virtual Interface
The following command configures source address selection such that every packet that is locally generated with no bound source address and going out on qfe2 prefers a source address hosted on vni0.
example% ifconfig qfe2 usesrc vni0
The ifconfig -a output for the qfe2 and vni0 interfaces displays as follows:
qfe2: flags=1100843<UP,BROADCAST,RUNNING,MULTICAST,ROUTER,IPv4> mtu 1500 index 4 usesrc vni0 inet 1.2.3.4 netmask ffffff00 broadcast 1.2.3.255 ether 0:3:ba:17:4b:e1 vni0: flags=20011100c1<UP,RUNNING,NOARP,NOXMIT,ROUTER,IPv4,VIRTUAL> mtu 0 index 5 srcof qfe2 inet 3.4.5.6 netmask ffffffff
Observe, above, the usesrc and srcof keywords in the ifconfig output. These keywords also appear on the logical instances of the physical interface, even though this is a per-physical interface parameter. There is no srcof keyword in ifconfig for configuring interfaces. This information is determined automatically from the set of interfaces that have usesrc set on them.
The following command, using the none keyword, undoes the effect of the preceding ifconfig usersrc command.
example% ifconfig qfe2 usesrc none
Following this command, ifconfig -a output displays as follows:
qfe2: flags=1100843<UP,BROADCAST,RUNNING,MULTICAST,ROUTER,IPv4> mtu 1500 index 4 inet 1.2.3.4 netmask ffffff00 broadcast 1.2.3.255 ether 0:3:ba:17:4b:e1 vni0: flags=20011100c1<UP,RUNNING,NOARP,NOXMIT,ROUTER,IPv4,VIRTUAL> mtu 0 index 5 inet 3.4.5.6 netmask ffffffff
Note the absence of the usesrc and srcof keywords in the output above.
Example 9 Configuring Source Address Selection for an IPv6 Address
The following command configures source address selection for an IPv6 address, selecting a source address hosted on vni0.
example% ifconfig qfe1 inet6 usesrc vni0
Following this command, ifconfig -a output displays as follows:
qfe1: flags=2000841<UP,RUNNING,MULTICAST,IPv6> mtu 1500 index 3 usesrc vni0 inet6 fe80::203:baff:fe17:4be0/10 ether 0:3:ba:17:4b:e0 vni0: flags=2002210041<UP,RUNNING,NOXMIT,NONUD,IPv6,VIRTUAL> mtu 0 index 5 srcof qfe1 inet6 fe80::203:baff:fe17:4444/128 vni0:1: flags=2002210040<RUNNING,NOXMIT,NONUD,IPv6,VIRTUAL> mtu 0 index 5 srcof qfe1 inet6 fec0::203:baff:fe17:4444/128 vni0:2: flags=2002210040<RUNNING,NOXMIT,NONUD,IPv6,VIRTUAL> mtu 0 index 5 srcof qfe1 inet6 2000::203:baff:fe17:4444/128
Depending on the scope of the destination of the packet going out on qfe1, the appropriately scoped source address is selected from vni0 and its aliases.
Example 10 Using Source Address Selection with Shared-IP Zones
The following is an example of how the usesrc feature can be used with the zones(5) facility in Solaris. The following commands are invoked in the global zone:
example% ifconfig hme0 usesrc vni0 example% ifconfig eri0 usesrc vni0 example% ifconfig qfe0 usesrc vni0
Following the preceding commands, the ifconfig -a output for the virtual interfaces would display as:
vni0: flags=20011100c1<UP,RUNNING,NOARP,NOXMIT,ROUTER,IPv4,VIRTUAL> mtu 0 index 23 srcof hme0 eri0 qfe0 inet 10.0.0.1 netmask ffffffff vni0:1: flags=20011100c1<UP,RUNNING,NOARP,NOXMIT,ROUTER,IPv4,VIRTUAL> mtu 0 index 23 zone test1 srcof hme0 eri0 qfe0 inet 10.0.0.2 netmask ffffffff vni0:2: flags=20011100c1<UP,RUNNING,NOARP,NOXMIT,ROUTER,IPv4,VIRTUAL> mtu 0 index 23 zone test2 srcof hme0 eri0 qfe0 inet 10.0.0.3 netmask ffffffff vni0:3: flags=20011100c1<UP,RUNNING,NOARP,NOXMIT,ROUTER,IPv4,VIRTUAL> mtu 0 index 23 zone test3 srcof hme0 eri0 qfe0 inet 10.0.0.4 netmask ffffffff
There is one virtual interface alias per zone (test1, test2, and test3). A source address from the virtual interface alias in the same zone is selected. The virtual interface aliases were created using zonecfg(1M) as follows:
example% zonecfg -z test1 zonecfg:test1> add net zonecfg:test1:net> set physical=vni0 zonecfg:test1:net> set address=10.0.0.2
The test2 and test3 zone interfaces and addresses are created in the same way.
Example 11 Turning Off DHCPv6
The following example shows how to disable automatic use of DHCPv6 on all interfaces, and immediately shut down DHCPv6 on the interface named hme0. See in.ndpd(1M) and ndpd.conf(4) for more information on the automatic DHCPv6 configuration mechanism.
example% echo ifdefault StatefulAddrConf false >> /etc/inet/ndpd.conf example% pkill -HUP -x in.ndpd example% ifconfig hme0 dhcp release
/etc/netmasks
/etc/default/inet_type
See attributes(5) for descriptions of the following attributes:
| ||||||||||||
dhcpinfo(1), dhcpagent(1M), in.mpathd(1M), in.ndpd(1M), in.routed(1M), ipsecconf(1M), ndd(1M), netstat(1M), zoneadm(1M), zonecfg(1M), ethers(3SOCKET), gethostbyname(3NSL), getnetbyname(3SOCKET), hosts(4), inet_type(4), ndpd.conf(4), netmasks(4), networks(4), nsswitch.conf(4), attributes(5), privileges(5), zones(5), arp(7P), ipsecah(7P), ipsecesp(7P), tun(7M)
ifconfig sends messages that indicate if:
Do not select the names broadcast, down, private, trailers, up or other possible option names when you choose host names. If you choose any one of these names as host names, it can cause unusual problems that are extremely difficult to diagnose.
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