Dell Force10 S4820T FTOS Command Reference Guide - Page 565

20 High Availability (HA) Overview High Availability (HA) in FTOS is configuration synchronization to minimize recovery time in the event of a Route Processor Module (RPM) failure. The feature is available on the C-Series and E-Series where noted by these symbols under command headings: c e s and FTOS on the E-Series supports RPM 1 + 1 redundancy. The Primary RPM performs all routing and control operations, while the Secondary RPM is online and monitoring the Primary RPM. In general, a protocol is defined as "hitless" in the context of an RPM failure/failover, and not failures of a line card, SFM, or power module. A protocol is defined as hitless if an RPM failover has no impact on the protocol. Some protocols must be specifically enabled for HA, and some protocols are only hitless if related protocols are also enabled as hitless (Refer to the redundancy protocol command). High Availability is supported on the S-Series S4810 with FTOS 8.3.12.0 and E-Series ExaScale ex with FTOS 8.1.1.0 and later. High Availability is supported on the S4820T with FTOS 8.3.19.0 and later. Commands The HA commands available in FTOS are: • patch flash://RUNTIME_PATCH_DIR • process restartable • redundancy auto-failover-limit • redundancy disable-auto-reboot • redundancy force-failover • redundancy primary • redundancy protocol • redundancy reset-counter High Availability (HA) | 565