Shulou(Shulou.com)06/02 Report--

DNS is divided into several regions for management, each of which is resolved by one or more domain name servers. If a separate DNS server is used and this server does not respond, domain name resolution for this area will fail. Therefore, it is recommended to use multiple DNS servers in each zone, which can provide domain name resolution fault tolerance. For regions with multiple domain name servers, you must select a primary domain name server (master) to save and manage the information of the whole zone. Other servers are called secondary domain name servers (slave).

Benefits of using a secondary domain name server:

1. The secondary DNS server provides zone redundancy and can resolve the DNS name of the zone for the client if the primary server in the zone stops responding.

two。 The creation of a secondary DNS server can reduce DNS network traffic, adopt a distributed structure, and add a DNS server to a low-speed WAN link can effectively manage and reduce network traffic.

3. The secondary server can be used to reduce the load on the primary server in the zone

The first step is to configure the network card address as 192.168.48.2

Step 2: install DNS

The third step is to set up a secondary DNS service

Set up area transfer (transfer the main DNS data over)

Step 4, set up the primary DNS area transfer (transfer the primary DNS to the secondary DNS)

Step 5: synchronize auxiliary DNS data

Different from the above

If two independent primary DNS map different domain names (need transponder to help them forward)

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