Radware WSD Server Farms Statistics Test

This test auto-discovers the web farms in the target Radware AppDirector, and reports statistics like SNMP errors, HTTP session requests etc. for each web farm. Triangulation requests are received, answered, and redirected so as to provide the ability to send server's responses directly to the client. Sending responses that way reduces the number of hops through which the reply packet passes, improving the response time. In addition, the traffic passing through AppDirector is reduced, since most incoming requests are rather small and outbound traffic represents the bulk of data exchanged between clients and servers. So, when a new request for service arrives, AppDirector selects the best server for the required service and the response from server to client, however, is sent directly to the client, without passing through AppDirector. The client can be located on the same network as AppDirector and the server, or it can be located behind the router. Using this test, administrators can identify if there is a malfunction or if there is a problem with incoming or outgoing data on each web farm. By taking corrective actions, administrators can avert problems from cascading through the web farm network.

Target of the test : A Radware AppDirector

Agent deploying the test : An External agent

Outputs of the test : One set of results for each web farm configured on the target Radware Appdirector that is to be monitored.

Configurable parameters for the test
Parameters	Description
Test period	How often should the test be executed
Host	The IP address of the target switch that is being monitored.
SNMPPort	The port at which the monitored target exposes its SNMP MIB; the default is 161.
SNMPVersion	By default, the eG agent supports SNMP version 1. Accordingly, the default selection in the SNMPversion list is v1. However, if a different SNMP framework is in use in your environment, say SNMP v2 or v3, then select the corresponding option from this list.
SNMPCommunity	The SNMP community name that the test uses to communicate with the firewall. This parameter is specific to SNMP v1 and v2 only. Therefore, if the SNMPVersion chosen is v3, then this parameter will not appear.
Username	This parameter appears only when v3 is selected as the SNMPversion. SNMP version 3 (SNMPv3) is an extensible SNMP Framework which supplements the SNMPv2 Framework, by additionally supporting message security, access control, and remote SNMP configuration capabilities. To extract performance statistics from the MIB using the highly secure SNMP v3 protocol, the eG agent has to be configured with the required access privileges – in other words, the eG agent should connect to the MIB using the credentials of a user with access permissions to be MIB. Therefore, specify the name of such a user against this parameter.
AuthPass	Specify the password that corresponds to the above-mentioned Username. This parameter once again appears only if the SNMPversion selected is v3.
Confirm Password	Confirm the AuthPass by retyping it here.
AuthType	This parameter too appears only if v3 is selected as the SNMPversion. From the AuthType list box, choose the authentication algorithm using which SNMP v3 converts the specified username and password into a 32-bit format to ensure security of SNMP transactions. You can choose between the following options: MD5 - Message Digest Algorithm SHA - Secure Hash Algorithm SHA224 - Secure Hash Algorithm 224 bit SHA256 - Secure Hash Algorithm 256 bit SHA384 - Secure Hash Algorithm 384 bit SHA512 - Secure Hash Algorithm 512 bit
EncryptFlag	This flag appears only when v3 is selected as the SNMPversion. By default, the eG agent does not encrypt SNMP requests. Accordingly, the this flag is set to No by default. To ensure that SNMP requests sent by the eG agent are encrypted, select the Yes option.
EncryptType	If the EncryptFlag is set to Yes, then you will have to mention the encryption type by selecting an option from the EncryptType list. SNMP v3 supports the following encryption types: DES - Data Encryption Standard 3DES - Triple Data Encryption Standard AES - Advanced Encryption Standard AES128 - Advanced Encryption Standard 128 bit AES192 - Advanced Encryption Standard 192 bit AES256 - Advanced Encryption Standard 256 bit
EncryptPassword	Specify the encryption password here.
Confirm Password	Confirm the encryption password by retyping it here.
Timeout	Specify the duration (in seconds) within which the SNMP query executed by this test should time out in this text box. The default is 10 seconds.
Data Over TCP	By default, in an IT environment, all data transmission occurs over UDP. Some environments however, may be specifically configured to offload a fraction of the data traffic – for instance, certain types of data traffic or traffic pertaining to specific components – to other protocols like TCP, so as to prevent UDP overloads. In such environments, you can instruct the eG agent to conduct the SNMP data traffic related to the monitored target over TCP (and not UDP). For this, set this flag to Yes. By default, this flag is set to No.
Engine ID	This parameter appears only when v3 is selected as the SNMPVersion. Sometimes, the test may not report metrics when AES192 or AES256 is chosen as the Encryption type. To ensure that the test report metrics consistently, administrators need to set this flag to Yes. By default, this parameter is set to No.

Measurements made by the test
Measurement	Description	Measurement Unit	Interpretation
DNS requests received	Indicates the number of DNS requests received by this web farm during the last measurement period.	Number	This measure is a good indicator of load on the web farm. Compare the value of this measure across web farms to identify the web farm that received maximum number of DNS requests. .
DNS requests answered	Indicates the number of DNS requests that were answered by this web farm during the last measurement period.	Number	A low value indicates that there are traffic issues in the web farm. Compare the value of this measure across web farms to identify the web farm that is poor in answering the DNS requests received.
DNS requests re-directed to remote server	Indicates the number of DNS requests that were redirected to a remote server from this web farm during the last measurement period.	Number	DNS requests that are received beyond the capacity of the web farm is redirected to a remote server in order to balance the load.
HTTP sessions received	Indicates the number of HTTP sessions that were received by this web farm during the last measurement period.	Number	This measure is a good indicator of load on the web farm. Compare the value of this measure across web farms to identify the web farm that received maximum number of HTTP requests.
HTTP sessions re-directed to local server	Indicates the number of HTTP sessions that were directed to a local server by this web farm during the last measurement period.	Number	HTTP requests that are received beyond the capacity of the web farm is redirected to a local server in order to balance the load.
HTTP sessions re-directed to remote server	Indicates the number of HTTP sessions that were redirected to remote server by this web farm during the last measurement period.	Number	HTTP requests that are received beyond the capacity of the web farm is redirected to a remote server in order to balance the load.
Triangulation requests received	Indicates the number of triangulation requests received by this web farm during the last measurement period.	Number	There are two modes of triangulation. To handle the distribution of IP protocols (for example, TCP or UDP), and when other redirection methods cannot be used, Global Triangulation redirection is used. Local Triangulation mode provides the ability to send server"s responses directly to the client. Requests are triangulated in order to improve network stability and reduce the number of hops and improve response time. Compare the value of this measure across web farms to identify the web farm that received maximum number of triangulation requests.
Triangulation requests answered	Indicates the number of triangulation requests that were answered by this web farm during the last measurement period.	Number	Compare the value of this measure across web farms to identify the web farm that is poor in answering the triangulation requests received.
Triangulation requests re-directed to remote server	Indicates the number of triangulation requests redirected to a remote server from this web farm during the last measurement period.	Number	Triangulation requests that are received beyond the capacity of the web farm is redirected to a remote server in order to balance the load.
RTSP requests received	Indicates the number of RTSP (Real Time Streaming protocol) requests received by this web farm during the last measurement period.	Number	Compare the value of this measure across web farms to identify the web farm that received maximum number of RTSP requests.
RTSP requests re-directed to local server	Indicates the number of RTSP requests that were redirected to a local server from this web farm during the last measurement period.	Number	RTSP requests that are received beyond the capacity of the web farm is redirected to a local server in order to balance the load.
RTSP requests re-directed to remote server	Indicates the number of RTSP requests that were redirected to a remote server from this web farm during the last measurement period.	Number	RTSP requests that are received beyond the capacity of the web farm is redirected to a remote server in order to balance the load.
SIP requests received	Indicates the number of SIP requests that were received by this web farm during the last measurement period.	Number	Compare the value of this measure across web farms to identify the web farm that received maximum number of SIP requests.
SIP requests re-directed to local server	Indicates the number of SIP requests that were redirected to a local server during the last measurement period.	Number	SIP requests that are received beyond the capacity of the web farm is redirected to a local server in order to balance the load.
SIP requests re-directed to remote server	Indicates the number of SIP requests that were redirected to remote servers by this web farm during the last measurement period.	Number	SIP requests that are received beyond the capacity of the web farm is redirected to a remote server in order to balance the load.
Proxy sessions received	Indicates the number of Proxy (Client NAT redirection) requests received by this farm during the last measurement period.	Number	Proxy requests are the ones whose IPs are masked. Compare the value of this measure across web farms to identify the web farm that received maximum number of proxy requests.
Proxy sessions re-directed to local server	Indicates the number of Proxy (Client NAT redirection) requests received by this farm and were redirected to a local server during the last measurement period.	Number	Proxy requests that are received beyond the capacity of the web farm is redirected to a local server in order to balance the load.
Proxy sessions re-directed to remote server	Indicates the number of Proxy (Client NAT redirection) received by this farm and were redirected to remote servers during the last measurement period.	Number	Proxy requests that are received beyond the capacity of the web farm is redirected to a remote server in order to balance the load.