Arcserve 7100, Руководство пользователя

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How to Enable Round Robin on the DNS Server to Balance Load
How to Enable Round Robin on the DNS Server to Bal-
ance Load
The Microsoft DNS Server supports round robin, which is a technique used for bal-
ancing the load between servers. This feature enables DNS to send both IP
addresses when a query is received for
myserver.mydomain.com . The client (or
Resolver) always uses the first one. The next time when DNS receives a query for
this name, the order of the IP address list is changed using round robin method (the
address that was first in the previous list is last in the new list). Round Robin of
name records is not supported because only one canonical name is allowed for any
one alias.
In the Appliance, you can add record(s) for all the IPv4 address to the Domain
Name Service(DNS) Server to get load balance among the network interfaces.
For more information on load balancing between servers, refer to RFC 1794 .
How to Add a Record for Additional IP Addresses to Domain Name Service
Server
When a server has two or more network interface cards (NICs), or more than one
IP address for an NIC, you can add a record for the additional IP address(es) to the
DNS server by creating an "A" record for each IP address.
Example:
Consider that a server's DNS host name is <myserver> and DNS domain name is
<mydomain.com>. This server has following two IP addresses assigned:
IPAddress1
IPAddress2
To add these IP addresses to the DNS Server, create two "A" records in the <mydo-
main.com> zone as below:
Myserver A <IPAddress1>
Myserver A <IPAddress2>
For the Resolver to get the same IP address every time, create two more "A"
records assigning a unique name to each address as below:
Altname1 A <IPAddress1>
Altname2 A <IPAddress2>
222 Arcserve Appliance User Guide