Network configuration
DNS
5-14
DNS
The AP provides several options to customize DNS handling. To configure these options,
select Network > DNS.
DNS servers
Server 1: Specify the IP address of the primary DNS server for the AP to use.
Server 2: Specify the IP address of the secondary DNS server for the AP to use.
Server 3: Specify the IP address of the tertiary DNS server for the AP to use.
DNS advanced settings
DNS cache
Enable this checkbox to activate the DNS cache. Once a host name is successfully resolved to
an IP address by a remote DNS server, it is stored in the cache. This speeds up network
performance, because the remote DNS server does not have to be queried for subsequent
requests for this host.
An entry stays in the cache until one of the following is true:
An error occurs when connecting to the remote host
The time to live (TTL) of the DNS request expires
The AP restarts
DNS switch on server failure
This setting controls how the AP switches between the primary and secondary DNS servers.
When enabled, the AP switches servers if the current server replies with a DNS server
failure message.
When disabled, the AP switches servers if the current does not reply to a DNS request.
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