Dealing with network upgrade glitches while ensuring service delivery remains unaffected requires careful planning and proactive measures like Schedule Upgrades During Off-Peak Hours, Perform a Full Backup Before the Upgrade, Implement Network Monitoring Tools (Real-Time Monitoring and Alert Systems), Upgrade in phases, such as by individual segments or regions, to isolate potential problems and minimize widespread impact. Develop a detailed plan outlining each step of the upgrade process, including timelines, potential risks, and fallback procedures etc.

Para manter a qualidade do servi?o durante as atualiza??es de rede, realizo um planejamento estratégico, priorizando horários de baixo tráfego e aplicando testes extensivos para prevenir falhas. Uma vez que a atualiza??o está em andamento, monitoro em tempo real e ajusto rapidamente qualquer irregularidade, se necessário, através de solu??es emergenciais. A comunica??o transparente com clientes e equipes internas é o ponto-chave para uma transi??o suave, assegurando que todos estejam alinhados e o servi?o se mantenha estável.

There is a standard process for expansion or upgrading your network that design team have to follow. Staring with defining the scope of work that need to be done, designing the work and finally the Planning the strategy of execution. Network has to be divided into clusters abd wirk start from outside the least low traffic to inside the core busiest. The timing should be maintenance window only.

Here are key tactics that can be employed to maintain service quality during network enhancements: 1) Stage Upgrades During Low-Traffic Periods: Conducting upgrades during periods of low traffic is critical. By doing so, the organization minimizes potential disruptions to service, thereby ensuring that customers experience minimal impact during their usual usage times. 2) Comprehensive Testing Before Going Live: Rigorous testing of systems before making any changes live is vital. This includes running simulations and stress tests to identify any potential issues. 3) Keeping stakeholders informed about planned changes is crucial. This includes notifying both internal teams and external customers about upcoming upgrades.

You cannot Truly Test a Network Upgrade upfront if you are Working for a ISP. You can Check configs by multiple persons,but No matter what you are doing , there will be a Short Interruption in Traffic while upgrading. Also its not possible to allways have These cutovers outside of Working hours. From my experience its best to clearly Communicate this.