Intergraph WebScale User Manual page 36

WebScale™ User's Guide
types, and filtering modes setup for them. If WebScale detects an inconsistent rule
among the hosts in the cluster, it will enter a message in the Windows NT Event Log.
When this happens, you should consult the Event Log to determine which rule was
disabled, fix it and restart WebScale on this host. Please see the Execution and
Control section for more information on error logging and cluster operations.
If your software license changes and you are no longer licensed for the number of rules
you have installed, you should delete some of the rules to comply with the new license
terms. You will be warned of this situation, and your rules will remain unchanged so
that you can make the necessary changes. Note that WebScale driver will use only the
number of rules for which you are licensed (starting from the first rule).
The following subsections explain each of the parameters used to build port rules.
Port Range
This parameter specifies the TCP/UDP port range that a port rule should cover. If a
given rule applies to a single port, set the start and end port numbers to the same value.
Port numbers in a range of 0 to 65,535 are currently supported.
Protocols
This parameter lets you choose the specific TCP/IP protocol that a port rule should
cover: TCP, UDP or both protocol types. Only the network traffic for the specified
protocol will be affected by the rule; the rest of the traffic will be handled according to
default filtering mode.
Single Host Filtering Mode
This parameter specifies that network traffic for the associated port rule will be handled
by a single host in the cluster according to the specified handling priority. This filtering
mode is similar to the default traffic handling policy. However, by setting the handling
priority parameter for each host, you can change the default host which handles this port
rule's traffic and override the order in which hosts take over the handling of traffic in
the event of a failure. This filtering mode provides fault tolerance for the handling of
network traffic.
Your current license key may disable the use of single host filtering mode. In this event,
please contact Intergraph Computer Systems, Inc. to obtain a new license key that will
enable this functionality.
Handling Priority
When using single host filtering mode, this parameter specifies the local host's priority
for handling the networking traffic for the associated port rule. The host with the highest
handling priority (lowest numerical value) for this rule among the current members of
32