Reflections on deploying enterprise Routers

When an enterprise's IT organization deploys new routers and switches, a common phenomenon is that they usually want the devices to have a long life cycle. However, they often face the challenge of ensuring that these devices not only support the current and those that are likely to become real in the short term, it can also meet the requirements that may arise in the next few years.

At present, most enterprise IT organizations usually adopt this method when deploying routes: Remove servers from the branches and include them in the central data center. In addition, many IT organizations have reduced the number of data centers supporting and deploying server virtualization. Personally, I think this method is quite a taste of "putting all the eggs in one basket"-in case of an accident, "basket" accidentally falls onto the ground, the consequences will be unimaginable. In this case, enterprise data centers become more important to enterprise operations, so they must be able to provide the highest level of availability while also providing a higher level of traffic aggregation and scalability.

To verify this, I spoke with the vice president of the architecture of a large financial service company. He said his company has deployed a series of virtualization solutions, and the root cause of their determination to take these initiatives is cost optimization. He added that, due to virtualization, their data center's previous "Five 9s" availability target is no longer acceptable, and their new goal is 100% availability.

There are many ways to improve the availability of the router. This includes the use of redundant hardware systems and high availability network operating system software. The former supports uninterrupted operations when server components fail, and the latter supports online software upgrades, troubleshooting of non-disruptive redundant routing processors, and non-Disruptive processes and Protocol restart.

When talking about the scalability of A vro, the most important thing is to verify whether its performance will be adversely affected when starting various functions. For example, in the integrated data center environment mentioned earlier, it is necessary to enable some security functions, such as the access control list ACL, firewall function set, and traffic event log. Other frequently used router functions and services include application identification and QoS policy execution.

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