Network maintenance / disaster recovery

what is preventative

• update firmware / software

• run antivirus scans

• inspect network cables

what is corrective

• replace faulty switch

• remove malware

• restore connection

what is adaptive

• update ip SCHEMES

• expand bandwidth for increased network

what is perfective

• change router config

• upgrade software

• change to a better ISP

what is HSRP

Hot standby router protocol

what is Hot standby router protocol

multiple routers can share ip / MAC addresses

what is VRRP

Virtual router redundancy protocol

what is Virtual router redundancy protocol

enhances network reliability by having extra default gateways

what is BGP

boarder gateway protocol

what is boarder gateway protocol

can exchange information between different networks on the internet.

how to plan

• create rollback

• downtime turn off devices

• compatibility with new devices

how to back up config

• document all previous config

how to test

verify connectivity through ping

record changes and why

how to automate tasks

python scripts to manage config, and run repetitive jobs

how to maintain security performance

regular updates

firewalls

antivirus software

strong passwords / MFA