Brocade Unified IP MIB Reference (Supporting FastIron Releases 07.5.00 and 08.0.10) - Manual (Page 689)

Unified IP MIB Reference 663
53-1003106-01
GSLB remote ServerIron configuration table
65
GSLB remote ServerIron configuration table
The Global Server Load Balancing (GSLB) enables a ServerIron to add intelligence to authoritative
Domain Name System (DNS) servers by serving as a proxy to the servers. As a DNS proxy, the GSLB
ServerIron evaluates the server IP addresses in the replies from the DNS server for which the
ServerIron is a proxy. Based on the results of the evaluation, the GSLB ServerIron can change the
order of the addresses in the reply so that the “best” host address for the client is first on the list.
The GSLB remote ServerIron configuration table contains the configuration of ServerIrons that act
as DNS proxies to the clients. They also intercept the IP addresses replied by the DNS authoritative
servers to select the best address for the requesting client.
Name, OID, and syntax Access Description
snL4GslbSiteRemoteServerIronTa
ble
brcdIp.1.1.4.27.1 None GSLB remote ServerIron configuration table.
snL4GslbSiteRemoteServerIronIP
brcdIp.1.1.4.27.1.1.1
Syntax: IpAddress Read-only Specifies the management IP address of the remote
ServerIron in a site. This address must not be any of the
configured VIPs.
snL4GslbSiteRemoteServerIronPr
eference
brcdIp.1.1.4.27.1.1.2
Syntax: Integer Read-write Specifies the preference of a remote ServerIron. This metric is
a numeric preference value, that is assigned to each site
ServerIron. It is used to select that ServerIron if the previous
metrics do not select a best site. The GSLB policy prefers the
site ServerIron with the highest administrative preference. The
preference ServerIron to do the following.
•
Temporarily change the preference of a ServerIron site to
accommodate changing network conditions. For
example, if sites are offering proxy content service, the
link between a site proxy server farm and the content
origin may be highly congested, making that site less
desirable. This factor is not visible to the ServerIrons and
thus cannot be reflected in the other GSLB metrics.
•
Temporarily disqualify a site ServerIron from being
selected, without otherwise changing the site
configuration or the GSLB ServerIron configuration. For
example, maintenance can be performed on the site
ServerIron without making network changes. In this case,
set the preference to 0.
•
A GSLB ServerIron can be biased; that is, it can be
configured as a site ServerIron (for locally configured
VIPs) to always favor itself as the best site. In this case,
assign a preference of 255 to the site for the GSLB
ServerIron itself, and assign a lower preference to the
other site ServerIrons, or use the default (128) for those
sites.
The administrative preference is disabled by default,
which means it is not included as one of the GSLB
metrics. When this metric is enabled, the default
administrative preference for sites is applied. It can be
changed on an individual site basis.
Valid values: 0 – 255
Default: 128