Port Status - Field Help
Current Statistics
To refresh statistics at any time, click Refresh Statistics.
- Cluster
- The cluster name or address to which clients connect. The cluster value is either a
symbolic name or in dotted-decimal format. A cluster value of 0.0.0.0 can be used to
specify a wildcard cluster. Please refer to the "Use a wildcard cluster to combine server
configurations" section in the
Load Balancer Administration Guide
for more information.
- Cluster Address
- The address to which clients connect. The cluster address can be either the
dotted-decimal IP address or the host name of the machine. If the cluster value is not resolvable,
you must provide this IP address of the physical machine.
- Port number
- The number of the port.
- Number of servers
- The number of servers running on this port.
- Maximum server weight
- The maximum server weight for servers on this port. The weight is based on internal
counters in the executor, feedback from the advisors, and feedback from a
system-monitoring program, such as Metric Server.
- Total active connections
- The current total number of active connections for this port.
- Connections per second
- The current number of connections per second for this port.
- KBytes transferred per second
- The number of kilobytes transferred per second on this port.
- Number of half open connections
- The number of half open connections on this port.
- Forwarding Method
- Displays the forwarding method protocols for this port:
- MAC Based forwarding (default)
- NAT/NAPT
- Content-based routing
- Protocol forwarding (Only valid with Content-based routing forwarding method)
- Indicates the type of protocol you are using in your forwarding method, either HTTP or SSL.
Configuration Settings
Edit any of the values on the Configuration Settings tab, then click Update Configuration.
- Stale timeout (seconds)
- The number of seconds during which there can be no activity on a connection before that
connection is removed. The default value for port 21 is 900; the default value for port 23
is 259,200. The default value for all other ports is 300 and can also be set at the
executor and cluster levels.
- Weight bound
- The weight bound for this port. The default value is 20 and can also be set at the
executor and cluster level.
- Maximum number of servers
- The maximum number of servers for this port. The default value is 32 and can also be set
at the executor and cluster levels.
- Sticky time (seconds)
- The sticky time for this port.
Sticky time is used to create an affinity relationship between a client and a specific
server. After the sticky time is exceeded, the client might be sent to a server
different from the previous. The default value is 0, meaning that the port is not sticky.
Sticky time can also be set at the executor and cluster levels.
Note: When using cbr forwarding method, sticky time is only valid with SSL protocol, not
HTTP.
Note: Once a client has an affinity record at the port level, all subsequent requests from that
client within the sticky time interval are not analyzed by rules. Port affinity has precedence over
rule affinity.
- Port protocol
- The port protocol. This can be overridden on a per-cluster or per-port basis. Possible
values are TCP (Transmission Control Protocol), UDP (User Datagram Protocol),
or both protocols (TCP/UDP) and can also be set
at the executor and cluster levels. The default value is TCP/UDP.
- Cross port affinity (applies to Dispatcher's NAT/NAPT and MAC Based forwarding methods only)
- The default is the port's own port number. To enable cross port affinity,
set the cross port value to a port that:
- shares the same cluster address
- shares the same servers
- has the same (non-zero) sticky time value
- has the same sticky address mask bits value
Cross port affinity is the sticky/affinity feature expanded to cover
across multiple ports. When a client first makes a connection to one of the
ports, the server is selected. When subsequent connections come in from the
same client on the same port or a shared port (cross port), the same server
is accessed.
- Sticky address mask bits
- The number of high-order bits that can be defined for the client IP address mask.
Possible values are 8, 16, 24 and 32. The default is 32 bits, which disables
the sticky/affinity address masking feature.
Sticky address masking is an affinity feature enhancement to group clients
together based upon common subnet address; that is, common high-order bits
of the IP address. When sticky/affinity address masking is enabled for all subsequent
connections coming in from the same subnet, the same server is selected.
- Maximum number of half open connections
- The number of half open connections allowable before an alert signal is passed to indicate a possible
denial of service attack. The default is zero. To analyze incoming
requests for half-open connections, this number must be set to an integer greater than zero.
- Send TCP resets
- (Dispatcher only) If activated (yes), Dispatcher will send a TCP reset to the client when
the client has a connection to a server whose weight is 0 (either configured at 0 or if an advisor
marks it down). A TCP reset will cause the connection to be immediately closed. The default is no.
Note:TCP reset applies to all of the Dispatcher's forwarding methods. However, to use the TCP
reset feature, you must configure the client gateway address on the Executor status panel.
Lists
- List of Servers
- The numerical dotted decimal address (such as 9.37.52.11) and weight
(such as 10) of the currently-active servers. Weights are applied to all servers
on a port. Requests are distributed between servers based on their
weights relative to each other. For example, if one server is set to a weight
of 10 and the other to 5, the server set to 10 should get twice as many
requests as the server set to 5.
To remove a server, highlight the server in the list and click remove.
- List of Rules
-
To refresh the list at any time, click Refresh Statistics.
Please refer to the "Configuring rules-based load balancing" section of the
Load Balancer Administration Guide for
more information regarding rules-based load balancing.
Report
- Server
- The server that is being reported on.
- Active %
- The proportion of weight given to the active connections.
- New %
- The proportion of weight given to the new connections.
- Port %
- The proportion of weight given to the port.
- System %
- The proportion of weight given to the system load determined by the metric servers results.
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