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|System Administration Guide: Oracle Solaris Containers-Resource Management and Oracle Solaris Zones|
You must determine the host name for the zone. Then, you must assign an IPv4 address or manually configure and assign an IPv6 address for the zone if you want it to have network connectivity.
The host name you select for the zone must be defined either in the hosts database or in the /etc/inet/hosts database, as specified by the /etc/nsswitch.conf file in the global zone. The network databases are files that provide network configuration information. The nsswitch.conf file specifies which naming service to use.
If you use local files for the naming service, the hosts database is maintained in the /etc/inet/hosts file. The host names for zone network interfaces are resolved from the local hosts database in /etc/inet/hosts. Alternatively, the IP address itself can be specified directly when configuring a zone so that no host name resolution is required.
If you are using IPv4, obtain an address and assign the address to the zone.
A prefix length can also be specified with the IP address. The format of this prefix is address/prefix-length, for example, 192.168.1.1/24. Thus, the address to use is 192.168.1.1 and the netmask to use is 255.255.255.0, or the mask where the first 24 bits are 1-bits.
If you are using IPv6, you must manually configure the address. Typically, at least the following two types of addresses must be configured:
A link-local address is of the form fe80::64-bit interface ID/10. The /10 indicates a prefix length of 10 bits.
A global unicast address is based off a 64–bit prefix that the administrator configures for each subnet, and a 64-bit interface ID. The prefix can also be obtained by running the ifconfig command with the -a6 option on any system on the same subnet that has been configured to use IPv6.
The 64–bit interface ID is typically derived from a system's MAC address. For zones use, an alternate address that is unique can be derived from the global zone's IPv4 address as follows:
16 bits of zero:upper 16 bits of IPv4 address:lower 16 bits of IPv4 address:a zone-unique number
For example, if the global zone's IPv4 address is 192.168.200.10, a suitable link-local address for a non-global zone using a zone-unique number of 1 is fe80::c0a8:c80a:1/10. If the global prefix in use on that subnet is 2001:0db8:aabb:ccdd/64, a unique global unicast address for the same non-global zone is 2001:0db8:aabb:ccdd::c0a8:c80a:1/64. Note that you must specify a prefix length when configuring an IPv6 address.
For more information about link-local and global unicast addresses, see the inet6(7P) man page.
Inside an exclusive-IP zone, configure addresses as you do for the global zone. Note that DHCP and IPv6 stateless address autoconfiguration can be used to configure addresses.
See sysidcfg(4) for more information.