Radware Alteon, Инструкция по применению

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Alteon Application Switch Operating System Application Guide
Health Checking
Document ID: RDWR-ALOS-V2900_AG1302
503
Failure Types
This section describes the following failure types:
• Service Failure, page 503
• Server Failure, page 504
Service Failure
If a certain number of connection requests for a particular service fail, Alteon puts the service into
the service failed state. While in this state, no new connection requests are sent to the server for
this service. However, if graceful real server failure is enabled (using
/cfg/slb/adv/grace ena
),
state information about existing sessions is maintained and traffic associated with existing sessions
continues to be sent to the server. Connection requests to, and traffic associated with, other
load-balanced services continue to be processed by the server.
radius-any Sends either a RADIUS authentication or a RADIUS accounting
request, depending on the service port. The service port must be the
standard port for either RADIUS Authentication or Accounting.
rtsp Connects to the RTSP server on the standard 554 port and sends an
RTSP request determined by the group health check content value.
sip Sends an SIP ping (proprietary Nortel) request to the real server.
sipoptions Sends an SIP OPTIONS request to the real server.
smtp Attempts to access the SMTP server on the standard port 25 and
verify the validity of the username configured in the group health
check content.
sslh Sends an SSL Hello version 2 to the real server.
sslh3 Sends an SSL Hello version 3 to the real server.
tftp Attempts to connect to the TFTP server on the standard port 69 and
download the file specified in the group health check content using
TFTP.
wsp Monitors unencrypted connection-less WAP service availability,
optionally in conjunction with the RADIUS service.
Note: This health check is editable.
wtls-wsp Monitors encrypted connection-less WAP service availability,
optionally in conjunction with the RADIUS service.
Note: This health check is editable.
wtls-wtp Monitors encrypted connection-oriented WAP service availability,
optionally in conjunction with the RADIUS service.
Note: This health check is editable.
wtls Monitors encrypted connection-less or connection-oriented WAP
service availability, depending on the server port of the virtual
service. If the service port is not standard secure WSP or WTP port
(9202 or 9203), a TCP health check is performed.
wts Monitors WTS (Window Terminal Server) service availability.
Name Description