Technical Documentation



accelerations {initiate-alternative-queries;initiate-next-queries;no-refresh-before-ttl-expiry;}

Hierarchy Level

[edit services border-signaling-gateway gateway gateway-name name-resolution-cache]

Release Information

Statement introduced in JUNOS Release 10.0.


Configure the method, if any, that the BSG uses to accelerate the process of DNS name resolution for SIP servers.


initiate-alternative-queries—If this flag is on, the BSG initiates a name authority pointer (NAPTR) query, both a TCP and UDP service record (SRV) query, and an address record (A) query in parallel for each new SIP URI that it receives in a new transaction. This flag saves time if the NAPTR query fails.

Default: off

initiate-next-queries—If this flag is on, the BSG sends A record queries to all SIP servers returned in the SRV response instead of querying the first A record in the SRV response.

Default: off

no-refresh-before-ttl-expiry—if this flag is on, the BSG removes the SIP server from the cache when the TTL expires. If this flag is off, the BSG re-queries the A record and if the query is resolved, the BSG refreshes the TTL. As a result, the entry is not removed from the cache.

Default: off

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

Published: 2010-04-28