Brocade Communications Systems 12.4.00 Specifying Gslb controller locations, Configuring a zone

Proxy for DNS server 1

Specifying GSLB controller locations

By default, the GSLB controller is assigned to the North America geographic. Specify the GSLB controller location by entering the following command at the global configuration level.

ServerIronADX(config)# gslb default-location asia

ServerIronADX(config)# write memory

Syntax: [no] gslb default-location asia europe n-america s-america africa

If GSLB default location is not specified and if the requesting client prefix is from an unknown geography, then the GSLB controller assigns "north-america" as its geography. However, if the default location is specified, the GSLB controller assigns the configured geography to unknown client prefixes.

NOTE

This command needs a reload, therefore, issue the write memory command after configuring the command.

Configuring a zone

You must specify the DNS zone name and the host information (applications) within each zone for which you want the GSLB ServerIron ADX to provide global SLB. There are no defaults for these parameters. As soon as you specify the hosts and applications, the GSLB ServerIron ADX queries the DNS server (the one for which the GSLB ServerIron ADX is a proxy) for the IP addresses associated with the hosts and begins sending health checks to the hosts.

To configure a zone, enter commands such as the following:

ServerIronADX(config)# gslb dns zone-name brocade.com ServerIronADX(config-gslb-dns-brocade.com)# host-info www http ServerIronADX(config-gslb-dns-brocade.com)# host-info ftp ftp

This example adds the zone brocade.com and two host names within that zone: www and ftp. The GSLB ServerIron ADX will provide global SLB for these two hosts within the zone.

Syntax: [no] gslb dns zone-name <name>

The <name> parameter specifies the DNS zone name. If you delete a DNS zone (by entering no gslb dns zone-name <name>), the zone and all the host names you associated with the zone are deleted.

Syntax: [no] host-info<host-name> <host-application> <TCP/UDP-port-num>

The <host-name>parameter specifies the host name. You do not need to enter the entire (fully-qualified) host name. Enter only the host portion of the name. For example, if the fully qualified host name is www.brocade.com, do not enter the entire name. Enter only “www”. The rest of the name is already specified by the gslb dns zone-name command. You can enter a name up to 32 characters long.

The <host-application>parameter specifies the host application for which you want the GSLB ServerIron ADX to provide global SLB. You can specify one of the following:

•FTP: the well-known name for port 21. (Ports 20 and 21 both are FTP ports but on the ServerIron ADX, the name “FTP” corresponds to port 21.)

•TFTP: the well-known name for port 69

•HTTP: the well-known name for port 80

ServerIron ADX Global Server Load Balancing Guide	21
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