ccna 200 301 bookshare org

ccna 200 301 bookshare org.Nexus7K#By the way, the output of this command shows only a small part of the content, from which we can see that there are 3 modular processes running: UDLD, CDP and STP, which are all running at layer 2. Layer 3 protocols, such as OSPF, HSRP and PIM, are not yet enabled.7.2.2 Process RecoveryBy far one of the best features that NX-OS brings to the table is that it is essentially self-monitoring and self-repairing.The PSS (Persistent Storage Service) is responsible for storing and managing the operational information and configuration of various services. Most services can use checkpoints to store their status on a regular basis, but not all services can do so. Some services will restart and revert to their last stored state of checkpoints after a service failure. After several attempts to restart and all fail, the system switches to the backup management engine. The system collects all information and is able to send this information to a remote file server. Keep the following important factors in mind.The various services store status information in checkpoints that are stored by the PSS. The system will automatically restart services after they fail... The restarted service contacts the PSS and reverts to its last checkpoint. Lo After several failed restarts. the system switches the management engine. -The system will log all information and will save and send it to the remote file server. However, it is also important to remember that not all services use the checkpointing feature of PSS. Some protocols, such as IS.7.2 NX-OS Software Overviewmachines need to rely on ray channel ports to communicate with each other and storage devices, and Catalyst switches need to use Ethernet ports to communicate with data devices. You can provide Ethernet ports, ray channel ports, or a combination of ports by adding expansion cards to first-generation Nexus devices. But the type of each port is determined at the factory by the hardware circuitry, meaning you can only use it for a specific type of traffic or it won't work.OSPF> BGP and RIP, will not revert to their previous state after a reboot, because they need to recreate new information after a reboot.I should clarify one thing: During the gentle restart required for management, all traffic in the data plane is forwarded as usual according to the information previously stored in the RIB (Routing Information Base). Once the service is restarted well, it begins to establish adjacencies and re-establish various table phases, with the ultimate goal of minimizing the chances of disturbing the data plane. We now use the command restart to trigger a gentle restart.