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Cisco Broadband Access Center 3.8 Administrator Guide
OL-27172-01
Chapter 2 Broadband Access Center Architecture
Architecture
• STUN server:
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Supports a UDP based connection request mechanism defined in TR069 Annex G to allow Cisco
BAC to initiate a session with a CPE that is operating behind a NAT Gateway.
• Cisco Management Heartbeat Server (CMHS) server:
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A new connection request method that allows Cisco BAC to send connection requests to DLC
devices through the CMHS server, using BAC north bound API interfaces or BAC Admin UI.
• Client API that provides total client control over the system’s capabilities.
• Provisioning Groups that provide:
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Logical grouping of DPE servers, CAR-RADIUS servers and CNR-DHCP servers in a
redundant cluster.
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Redundancy and scalability
See Provisioning Groups, page 2-6, for additional information.
• The Cisco BAC process watchdog that provides:
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Administrative monitoring of all critical Cisco BAC processes.
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Automated process restart capability.
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Ability to start and stop Cisco BAC component processes.
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Ability to send the SNMP trap if any BAC process fails to start or stop, or stops unexpectedly.
SNMP trap is a mechanism that the trap receiver uses to get the information about the process
or component failure. A SNMP trap is also sent if Cisco BAC process watchdog fails to start on
any of the servers that run Cisco BAC components. Cisco BAC process watchdog reports all the
critical conditions of BAC components through SNMP trap.
See Cisco BAC Process Watchdog, page 2-7, for additional information.