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NetStructure™ 480T Routing Switch User Guide
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For FTP, Telnet, and POP3, service-check attempts to log on and
off the application on the server using the specified userID and
password.
For SMTP, service-check identifies the identity of the switch by
providing the specified DNS domain. The SMTP server might not
even use the specified DNS domain for authentication, only
identification.
For NNTP, service-check queries the newsgroup specified.
Because service-checking is configured on a VIP basis, multiple
VIPs can use the same nodes, and you can run multiple service-
checks against a particular node IP address and port number, it is
possible for some of these service-checks to fail, while others pass.
Therefore, when determining if a given node can accept a new
connection for a VIP, the node must pass the service-check
configured for that VIP.
When showing detailed VIP information, the status for individual
nodes is shown with respect to that VIP.
To enable service-check, use this command:
enable slb vip [<vipname> | all] service-check
To disable service-check, use this command:
disable slb vip [<vipname> | all] service-check
GoGo Mode Health Checking
The 480T routing switch supports health checking on servers
participating in SLB GoGo mode. You can configure multiple
health checks (ping-check, tcp-port-checks and service-checks)
simultaneously on a given GoGo mode grouping. A physical port in
a GoGo mode grouping is considered available for GoGo traffic
only if all configured health checks pass.
Use these commands to enable GoGo mode health checking:
enable slb gogo-mode master ping-check {ipaddress}
enable slb gogo-mode master tcp-port-check [port |
all]