Technical data
ServerIron ADX Graphical User Interface Guide 69
53-1002412-01
Health checks
7
The Health Checks page is displayed, as shown in Figure 53.
FIGURE 53 Health check summary
3. Under Layer 2 ARP Check, provide the following information:
• Periodic ARP Check: Select the Enable check box to send layer 2 ARP request to the real
server to verify that the device can reach the server through the network. By default,
periodic ARP check is enabled.
• Interval: Enter the time of interval for Layer 2 ARP check, in seconds. The range is from 10
through 14,400 seconds. The default is 10 seconds.
4. Under Layer 3 Ping Check, provide the following information:
• Real Server: Select the Enable check box to enable Layer 3 ping check on the real server.
The device uses the IP ping to determine whether the slowed response time indicates loss of
the real server If the time between the last packet sent to the real server and the last packet
received from the real server increases,
• Remote Server: Select the Enable check box to enable Layer 3 ping check on the remote
server.
The device uses the IP ping to determine whether the slowed response time indicates loss of
the remote server if the time between the last packet sent to the remote server and the last
packet received from the remote server increases.
• Ping Interval: Enter the ping interval for Layer 3 ping check, in seconds. The range is from
1 through 10 seconds. The default is 5 seconds.
• Ping Retries: Specifies the number of times that the device will ping a real server before
changing the server state to FAILED. Enter the number of ping retries for Layer 3 ping
check. The range is from 2 through 10. The default is 4.
5. Under Layer 4 TCP/UDP Check, provide the following information:
• Layer 4 Health Check: Select the Enable check box for Layer 4 health check.
When you bind a real server to a virtual server, the device performs either a Layer 4 TCP health
check, a Layer 4 UDP health check, or a Layer 7 health check to bring up the application port
that binds the real and virtual servers. The Layer 4 health check can be a TCP check or a UDP
check
• Fast Port Bring-up: Select the Enable check box to increase the speed of the bringup
process by sending more (up to a maximum of 50) health-checks at one time.










