3Com 3C16120 - SuperStack 3 Server Load Balancer, User Manual

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Creating a Balance Profile (Optional) 71
7 Leave Sticky Mode field set to Off .
8 The default health check is Ping , click Next. Other available health checks
are:
■
Ping — Server Load Balancer periodically pings each server using ICMP
Echo. The number of retries are configurable. If successive ping
attempts fail, the server is marked as down and is removed from the
pool of available servers.
■
TCP Port — Server Load Balancer periodically attempts to establish a
connection with each server using the same protocol (TCP or UDP)
and port number as the server load balancing service uses. If any
connection attempt fails, the server is marked as down and is removed
from the pool of available servers for the service.
■
HTTP URI — You can enter a URI that the Server Load Balancer
periodically requests from each server. A server response is considered
successful if the return code of response is within the range of
200-299. If any attempts fail, the server is marked as down and is
removed from the pool of available servers for the service. This
performs a more thorough check of the status of the Web servers.
■
None — No health checking is performed. All Servers are assumed to
be operational.
9 The Balance Profile Configuration - Health Checks page appears. This
page supplies default settings, which can be modified for your network,
for the following fields:
■
Period
This sets the number of seconds that elapse between health
checks.
■
Retries field
This sets the number of retries in a health check period.
■
Timeout
This sets the number of seconds the Server Load Balancer waits for
a health check reply from a server.
10 Click Next .
11 Click Finish . Your balance profile has been created.
slb_gsg.bk Page 71 Thursday, May 31, 2001 8:57 AM