Cisco 4000 Series Integrated Services Routers (ISR 4000) vs Cisco SD-WAN

• Easy to use, simple to operate, highly predictable. IOS/IOS-XE is well known and there is a virtually limitless pool of engineers who know this platform and if not having direct experience, can apply knowledge from other IOS/IOS-XE with very little adjustment.
• Extremely flexible due to wide variety of interfaces. NIM and SM-X provide a great deal options: TDM, E&M, FXO, FXS, switches and servers are all options.
• Robust IP feature set: Routing protocols, NBAR, Netflow, QoS, DMVPN. This large IP feature set gives us the ISR makes it a highly re-usable router, capable in many different use cases.

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• Before Cisco SD-WAN, our users even struggled to send emails with Microsoft 365
• Cloud applications, such as SharePoint, were not taking a long time to load and made it impossible to collaborate
• Streaming services--even though video streaming does not work at desired levels, music streaming started to work without interruption

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• The UCS-E blades that you can insert into the routers only get refreshed every 4-5 years. So the cpu/memory/HDD options are limited and quite dated
• Some LTE connectivity options for some countries are lacking or LTE NIM cards for some countries are not supported
• Does not support dual power supply options for maintaining uptime from power events

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• Ease of initial configuration - I'm not actually sure how to make it easier without losing granularity and control, but it can be very difficult and confusing when first setting up. Afterwards, it's just point and click.
• Model upload - It would be nice if a given hardware model could be "uploaded" to provide a basic configuration to start with.
• Logs - I'd prefer more options for filtering logs and having certain ones not be alarms of any kind.

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• deployment in different branches were quick and easy to be done
• Same config push on all routers helped to get the setup done in few hours.
• expansion is very easy with NIM available for different purpose whether it be WAN port or PRI or FXS port.
• Cube license helps to increase the SIP channel as and when required as no hardware change is required which is very helpful.

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• In my previous company, we had several production facilities across the US using Cisco's SD-WAN and it allowed the company to continue to provide for employees and our end customers when problems arose with circuits.
• As I mentioned previously, vManage allowed the company to track when there are circuit outages in a really simple portal. Before Cisco's SD-WAN, we had to spend money on 3rd party monitoring.
• Whenever there was an issue with the server, an employee could request assistance from anywhere instead of worrying about whether or not there was an IT employee present.

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