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Device Manager Guide, Cisco ACE 4700 Series Application Control Engine Appliance
OL-26645-02
Chapter 6 Configuring Real Servers and Server Farms
Configuring Health Monitoring
Configuring DNS Probe Expect Addresses
When a DNS probe sends a domain name resolve request to the server, it verifies the returned IP address
by matching the received IP address with the configured addresses.
Use this procedure to specify the IP address that the ACE appliance expects to receive in response to a
DNS request.
Assumption
A DNS probe has been configured. See Configuring Health Monitoring for Real Servers, page 6-41 for
more information.
Procedure
Step 1 Choose Config > Virtual Contexts > context > Load Balancing > Health Monitoring. The Health
Monitoring table appears.
Step 2 Select the DNS probe that you want to configure with an expected IP address. The Expect Addresses
subtable appears.
Step 3 Click Add to add an entry to the Expect Addresses table. The Expect Address configuration screen
appears.
Note You cannot modify an entry in the Expect Addresses table. Instead, delete the existing entry, and
then add a new one.
Step 4 In the IPv4/IPv6 Address field, enter the IP address that the ACE appliance is to expect as a server
response to a DNS request. You can enter multiple addresses in this field. However, you cannot mix IPv4
and IPv6 addresses.
Step 5 Do the following:
• Click Deploy Now to deploy this configuration on the ACE appliance.
• Click Cancel to exit this procedure without saving your entry and to return to the Expect Addresses
table.
• Click Next to save your entry and to add another IP Address to the Expect Addresses table.
Related Topics
• Configuring Health Monitoring for Real Servers, page 6-41
• DNS Probe Attributes, page 6-48
Configuring Headers for HTTP and HTTPS Probes
Use this procedure to specify header fields for HTTP and HTTPS probes.
Assumption
An HTTP or HTTPS probe has been configured. See Configuring Health Monitoring for Real Servers,
page 6-41 for more information.
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