SAS 9.4 Language Reference, 6th Edition

As an alternative, the block that contains the zero can be collapsed. Here is an example:

[2001:db8::1]:80

Example of an IPv6 Address That Includes a URL

Here is an example of an IP address that contains a URL:

http://[2001:db8:0::1]:80

The http:// prefix specifies a URL. The brackets are necessary only if also specifying

a port number. Brackets are used to separate the address from the port number. If no port

number is used, the brackets can be omitted.

Fully Qualified Domain Names (FQDN)

Because IP addresses can change easily, SAS applications that contain hardcoded IP

addresses are prone to maintenance problems.

To avoid such problems, use of an FQDN is preferred over an IP address. The name-

resolution system that is part of the TCP/IP protocol is responsible for locating the IP

address that is associated with the FQDN.

The following example restores client activity in the paused repository:

PROC METAOPERATE

SERVER="d6292.us.company.com"

PORT=2222

USERID="myuserid"

PASSWORD="mypassword"

PROTOCOL=BRIDGE

ACTION=RESUME

OPTIONS=""

NOAUTOPAUSE;

If an IP address had been used and if the IP address that was associated with the

computer node name had changed, the code would be inaccurate.

An FQDN can remain intact in the code while the underlying IP address can change

without causing unpredictable results. The TCP/IP name-resolution system automatically

resolves the FQDN to its associated IP address.

Here is an example of an FQDN that is specified in a SAS GUI application.

Fully Qualified Domain Names (FQDN) 781

Figure 42.1 Example of an FQDN in a SAS Management Console Window

The full FQDN, d11076.na.apex.com, is specified in the Remote Host field of the

Connect Server Properties window in SAS Management Console.

Some SAS products impose limits on the length for computer names.

The following code is an example of an FQDN that is assigned to a SAS menu variable:

%let sashost=hrmach1.dorg.com;

rsubmit sashost.sasport;

Because the FQDN is longer than eight characters, the FQDN must be assigned to a SAS

macro variable, which is used in the RSUBMIT statement.

782 Chapter 42 • Internet Protocol Version 6 (IPv6)