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5-39
Device Manager Guide, Cisco ACE 4700 Series Application Control Engine Appliance
OL-26645-02
Chapter 5 Configuring Virtual Servers
Configuring Virtual Servers
Transparent This field appears only for real servers identified as host servers.
Check the check box to specify that network address translation from the VIP address to the server IP is to
occur. Clear the check box to indicates that network address translation from the VIP address to the server
IP address is not to occur (default).
Dynamic
Workload
Scaling
This field appears only for host server farms.
Allows the ACE to burst traffic to remote VMs when the average CPU usage, memory usage, or both of the
local VMs has reached its specified maximum threshold value. The ACE stops bursting traffic to the remote
VMs when the average CPU or memory usage of the local VMs has dropped to its specified minimum
threshold value. This option requires that you have the ACE configured for Dynamic Workload Scaling
using a Nexus 7000, VM Controller, and VM probe (see the “Configuring Dynamic Workload Scaling”
section on page 6-14).
Click one of the following radio button options:
N/A—Not applicable (default).
Local—The ACE can use the VM Controller local VMs only for load balancing (bursting is not
allowed).
Burst—Enables the ACE to burst traffic to a remote VM Controller VMs.
When you choose Burst, the VM Probe Name field appears along with a list of available VM probes.
Choose an available VM probe or click Add to display the Health Monitoring pop-up window and
create a new VM probe or edit an existing one (see the “Configuring Health Monitoring” section on
page 6-39).
Fail-On-All This field appears only for host server farms.
By default, real servers that you configure in a server farm inherit the probes that you configure directly on
that server farm. When you configure multiple probes on a server farm, the real servers in the server farm
use an OR logic with respect to the probes, which means that if one of the probes configured on the server
farm fails, all the real servers in that server farm fail and enter the PROBE-FAILED state.
With AND logic, if one server farm probe fails, the real servers in the server farm remain in the
OPERATIONAL state. If all the probes associated with the server farm fail, then all the real servers in that
server farm fail and enter the PROBE-FAILED state. You can also configure AND logic for probes that you
configure directly on real servers in a server farm.
Check this check box to configure the real servers in a server farm to use AND logic with respect to multiple
server farm probes.
The Fail On All function is applicable to all probe types.
Table 5-11 New Server Farm Attributes (continued)
Field Description
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