Cisco ASR1002 Configuration Guide - Page 228

Hardware Redundancy Overview on the Cisco ASR 1000 Series Routers High Availability Overview • Software Redundancy on the Cisco ASR 1000 Series Routers, page 3 • Route Processor Redundancy, page 5 • Stateful Switchover, page 5 • IPsec Failover, page 6 • Bidirectional Forwarding Detection, page 6 Hardware Redundancy Overview on the Cisco ASR 1000 Series Routers Some models of the Cisco ASR 1000 Series Routers offer hardware redundancy within the same Cisco ASR 1000 Series Router through the following methods: • Allowing two Route Processors (RPs) in the same Cisco ASR 1000 Series Router • Allowing two Enhanced Services Processors (ESPs) in the same Cisco ASR 1000 Series Router No hardware redundancy is supported for the following hardware: • SPA interface processors (SIPs)-A SIP must be reloaded, and traffic briefly interrupted, for a SIP upgrade to complete. • Shared port adapters (SPAs)-A SPA must be reloaded, which will briefly interrupt traffic to that SPA, for a SPA software subpackage update to complete. Hardware redundancy on the Cisco ASR 1000 Series Routers gives users the following benefits: • A failover option-If a processor fails, the standby processor immediately becomes the active processor with little or no delay. The failover happens completely within the same router, so a second standby router is not needed. • No downtime upgrades-Using features like ISSU, a software upgrade can be handled on the standby processor while the active processor continues normal operation. Hardware redundancy is available on the Cisco ASR 1006 Router only at this time. provides a hardware redundancy overview. Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide 2