Four most important points must be in place before any upgrade activity: 1) Implementation plan 2) Backout / Rollback plan 3) Impact analysis 4) UAT evidence Sharing Proper downtime notification to all impacted applications. A bridge call should be set up during the implementation window and shared. Redundancy path availability must be taken into consideration to avoid minimum downtime. A phased upgrade is the best way to have minimum downtime. Impacted applications must be noted and approval should be availed from respective application owners. If downtime is required. Emergency contact numbers of NOC must be shared with application teams. The details of the upgrade must be shared with all stakeholders holders for reference.

To reduce downtime below points should be considered. 1. Planning for all situations, considering anything that can go wrong will go wrong. 2. Redundancy, for nodes which will be effected. 3. Documentation and training for field engineers. 4. Comminication, between IT teams and stakeholders.

1. Planning is one of the most important steps. Carefully plan out the upgrade, what to do and how to do it. 2. Rollback Strategy is also important. If for some reason you can't continue to upgrade you need to be able to go back. 3. Redudancy is key. Having a backup connection or equipments is usually a good way to avoid downtime. 4. Phased Implementation. Don't rush it, step by step you will be able to test everything allong the way. 5. Careful monitoring after the upgrade is complete. Some problems may arise after the upgrade. 6. A good team is also key. Having the right persons by your side is fundamental to do something like this. "Two heads are better than one."

Upgrading network capacity requires planning to minimize downtime risks: 1. Audit your existing infrastructure Identify bottlenecks & compatibility issues. Ensure licenses are ready before starting upgrades. 2. Implement Redundant Network Architecture Use LB's & set up high-availability configs. 3. Schedule Maintenance During Off-Hours. Ensure (SLAs). 4. Backup Critical Data & Configurations 5. Real-Time Monitoring, SolarWinds, Nagios, or Zabbix. 6. Set up alerts for packet loss, latency spikes or hardware malfunctions. 7. Test each segment after implementation. 8. Deploy Skilled Teams On-Site and Remotely. 9. Update network diagrams, config's, & operational guides. Follow these & you can significantly reduce downtime risks.

I would mitigate downtime risks during a network capacity upgrade by implementing a robust plan that includes scheduling upgrades during low-usage periods, thorough pre-upgrade testing, having a rollback strategy, and ensuring proper backup systems are in place.

1. Completely undertand the goals before you start. 2. Have a roll back planning. 3. Have a redundancy planning. 4. Have a excelent communication with your team and be sure that they understand their part in the project.

Before you even start with anything, you should understand the new requirement and recognize an added value for the new implementation. In some environments, downtime can be expensive.

1. Create backup plan. 2. Create rollback if upgrade not success. 3. Upgrade with step by step procedure. 4. Upgrade in the low traffic. 5. Stop data transaction until upgrade process done. 6. Inform to another division about upgrade activity. 7. During the upgrade engineer must enough sleep and no stress.