Behave With A Configured Dns Server; Static Dns Cache Configuration - Yealink SIP-T3 Administrator's Manual

Administrator's Guide for SIP-T2 /T3 /T4 /T5 /CP920 IP Phones

Behave with a Configured DNS Server

Static DNS Cache Configuration

Behave with a Configured DNS Server
When the phone is configured with a DNS server, it will behave as follows to resolve the domain name of the
server:
The phone performs a DNS query to resolve the domain name from the DNS server.
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If the DNS query returns no results for the domain name, or the returned record cannot be contacted, the values
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in the static DNS cache (if configured) are used when their configured time intervals are not elapsed.
If the configured time interval is elapsed, the phone will attempt to perform a DNS query again.
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If the DNS query returns a result, the phone will use the returned record from the DNS server and ignore the stat-
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ically configured cache values.
When the phone is not configured with a DNS server, it will behave as follows:
The phone attempts to resolve the domain name within the static DNS cache.
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The phone will always use the results returned from the static DNS cache.
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Static DNS Cache Configuration
The following table lists the parameters you can use to configure static DNS cache.
Parameter account.X.dns_cache_type
It configures whether the phone uses the DNS cache for domain name resolution of the SIP server
Description
and caches the additional DNS records.
0-Perform real-time DNS query rather than using DNS cache.
Permitted
1-Use DNS cache, but do not record the additional records.
Values
2-Use DNS cache and cache the additional DNS records.
Default 1
Parameter account.X.static_cache_pri
It configures whether preferentially to use the static DNS cache for domain name resolution of the SIP
Description
server.
0-Use domain name resolution from server preferentially
Permitted
Values
1-Use static DNS cache preferentially
Default
0
Parameter dns_cache_naptr.X.name
Description It configures the domain name to which NAPTR record X refers.
Permitted
Domain name
Values
Default Blank
Parameter dns_cache_naptr.X.order
It configures the order of NAPTR record X.
Description
NAPTR record with the lower order is more preferred.
Permitted
Integer from 0 to 65535
Values
Default 0
Parameter dns_cache_naptr.X.preference
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<MAC>.cfg
<MAC>.cfg
<y0000000000xx>.cfg
<y0000000000xx>.cfg
<y0000000000xx>.cfg