Beginning with Cisco IOS XE Release 2.5, a second style, This prefix style originated in RFC 2052. The query string has a prefix in the form of "ansport." and is attached to the fully qualified domain name (FQDN) Session Initiation Protocol (SIP) on Cisco VoIP gateways uses the DNS SRV query to determine the IP address of the user endpoint. SIP RFC 2782 Compliance with DNS SRV Queries To accommodate older systems, where the underscore is not used, CUBE may be configured In this case, protocol labels are prefixed with an underscore,įor example "_sip._". IPv6 Address Record (AAAA) Record: Maps a 128-bit IPv6 address to an FQDN.ĬUBE resolves SRV records in compliance with RFC2782 by default. The SRV RR also allows you to designate some hosts as primary servers and others as backups for a service.Īddress Record (A Record): Maps a 32-bit IPv4 address to a Fully Qualified Domain Name (FQDN). The SRV Resource Record (RR) allows you to use several servers for a single domain to move services from Service Record: SRV record is a specification of data in the DNS that defines the hostname and port number of servers for Feature Information for Configure and Troubleshoot DNS Lookup on CUBE on the CUBEĭescribes how Domain Name System (DNS) lookup takes place in CUBE to determine the IP address that corresponds to the hostnames used for Session Initiation Protocol (SIP) calls.ĬUBE can resolve the following DNS record types: Cisco Feature NavigatorĮnables you to determine which software images support a specific software release, feature set, or platform. Use Cisco Feature Navigator to find information about platform support and software image support. Otherwise, subsequent releases of that software release train also support that feature. Lists only the software release that introduced support for a given feature in a given software release train. The following table provides release information about the feature or features that are described in this module. This section describes how a DNS lookup takes place in CUBE to determine the IP address that corresponds to the hostnames used for Session Initiation Protocol (SIP) calls. Is required when hostnames are used as target endpoints under the dial-peers of the CUBE to route the calls out. The conversion from a hostname to an IP address Each unique IP address can have an associated hostname. The Domain Name System (DNS) is a distributed database in which you can map hostnames to IP addresses through the DNS protocolįrom a DNS server. Hosted Scenairos (Lineside Connectivity)Ĭonfigure and Troubleshoot DNS Resolution.CVP Survivability TCL support with High Availability.Stateful Switchover Between Redundancy Paired Intra or Inter-box Devices.High Availability on Cisco C8000V Series Cloud Services Routers.High Availability on Cisco ASR 1000 and Cisco Catalyst 8000 Series Routers.High Availability on Cisco 4000 Integrated Services Routers and Cisco Catalyst 8000 Series Edge Platforms.Configure Multiple Trunks Using Tenants.WebSocket-Based Media Forking for Cloud Speech Services.Support for PAID, PPID, Privacy, PCPID, and PAURI Headers.Pass-Through of Unsupported Content Types in SIP INFO Messages.SIP: RFC 2782 Compliance with DNS SRV Queries.Manipulate SIP Status-Line Header of SIP Responses.Inbound Leg Headers for Outbound Dial-Peer Matching.Outbound Dial Peer Group as an Inbound Dial-Peer Destination.Multiple Pattern Support on a Voice Dial Peer.Matching Inbound Dial Peers by URI of Incoming SIP Calls.Configure and Troubleshoot DNS Resolution.Advanced Features for Cisco Contact Center.Overview of Cisco Unified Border Element.
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