What was the revenue growth rate for JNPR's cloud network offering in Q1 2021 compared to the same period in the previous year
n significant sustainable advantages over all competitive platforms.
Second is the Cloud and Service Provider transition to 400-gig systems, where we're continuing to see success, both in wide area as well as data center use cases. Our 400-gig solutions are highly competitive, and we remain optimistic in our ability to not only protect our footprint, but also to capture net new opportunities in hyperscale, cloud major and Service Provider accounts.
Last but not least, the Service Provider 5G and metro markets, which we view as a large opportunity, that is likely to see healthy growth over the next several years. We are playing to win in the Service Provider vertical and believe our investments in automation technologies, such as Netrounds and the introduction of new metro-oriented solution such as the award winning ACX7100 family should position us to gain share in this attractive portion of the market, where historically we've had limited presence.
I firmly believe we're taking share and that the investments we're making will position us to not only capitalize on the big market opportunities that will unfold over the next few years, but also to see broader market success that decreases our sensitivity to macro trends. We believe our plans will enable us to emerge from the pandemic stronger than we entered, and deliver sustainable top and bottom line growth over the next several years.
Now I'd like to provide some additional insight into the quarter and address some of the key developments we're seeing from a customer solutions perspective. Starting with our automated WAN solution, which saw strong double-digit revenue growth year-over-year, and exceeded our own expectations in Q1. We experienced strength with both our Service Provider and Cloud customers, each of which delivered double-digit sales growth year-over-year. We grew in all geographies year-over-year, and momentum is healthy entering the June period.
In the Service Provider vertical, our diversification strategy is continuing to yield positive results, and we remain optimistic regarding the outlook for our cloud network offering which combined our new ACX product with our Paragon Automation portfolio. We believe these solutions are highly competitive and well positioned to win in one of the fastest growing portion of the Service Provider routing market. As I mentioned previously, we are playing to win in the Service Provider market, and I remain optimistic regarding the outlook for our automated WAN solutions in this important vertical.
I'd also like to highlight that our automated WAN portfolio had particularly strong orders from our cloud customers in Q1. While our strength was across multiple hyperscale accounts, we also saw improved activity with our largest cloud customer following several quarters of softer demand. Our cloud pipeline remains strong, but we are optimistic regarding the outlook for our wide area solutions, particularly in areas where we maintain incumbency, and are well positioned to benefit from forming a big tailwind, that are likely to start ramping later this year. And for the year, we are confident in our outlook for our automated WAN solution and we expect 2021 results to be slightly above the high-end of the long-term forecast range we provided at our February Investor Day, calling for a 1% decline to 3% growth.
While our cloud-ready data center solutions declined 10% year-over-year during Q1, orders grew nearly 30% year-over-year due to broad based strength across our Cloud, Enterprise and Service Provider customers. Win rate improved and we saw a material increase in average deal size in the quarter. Apstra exceeded our expectation, and is already enabling us to win data center opportunity we likely wouldn't have been able to secure if we hadn't completed the deal in January. Customer interest in our cloud-ready data center portfolio is high, and we remain optimistic regarding the outlook for this business.
While the Q1 revenue decline in our cloud-ready data center business was almost entirely due to expected weakness at a singl
n significant sustainable advantages over all competitive platforms.
Second is the Cloud and Service Provider transition to 400-gig systems, where we're continuing to see success, both in wide area as well as data center use cases. Our 400-gig solutions are highly competitive, and we remain optimistic in our ability to not only protect our footprint, but also to capture net new opportunities in hyperscale, cloud major and Service Provider accounts.
Last but not least, the Service Provider 5G and metro markets, which we view as a large opportunity, that is likely to see healthy growth over the next several years. We are playing to win in the Service Provider vertical and believe our investments in automation technologies, such as Netrounds and the introduction of new metro-oriented solution such as the award winning ACX7100 family should position us to gain share in this attractive portion of the market, where historically we've had limited presence.
I firmly believe we're taking share and that the investments we're making will position us to not only capitalize on the big market opportunities that will unfold over the next few years, but also to see broader market success that decreases our sensitivity to macro trends. We believe our plans will enable us to emerge from the pandemic stronger than we entered, and deliver sustainable top and bottom line growth over the next several years.
Now I'd like to provide some additional insight into the quarter and address some of the key developments we're seeing from a customer solutions perspective. Starting with our automated WAN solution, which saw strong double-digit revenue growth year-over-year, and exceeded our own expectations in Q1. We experienced strength with both our Service Provider and Cloud customers, each of which delivered double-digit sales growth year-over-year. We grew in all geographies year-over-year, and momentum is healthy entering the June period.
In the Service Provider vertical, our diversification strategy is continuing to yield positive results, and we remain optimistic regarding the outlook for our cloud network offering which combined our new ACX product with our Paragon Automation portfolio. We believe these solutions are highly competitive and well positioned to win in one of the fastest growing portion of the Service Provider routing market. As I mentioned previously, we are playing to win in the Service Provider market, and I remain optimistic regarding the outlook for our automated WAN solutions in this important vertical.
 I'd also like to highlight that our automated WAN portfolio had particularly strong orders from our cloud customers in Q1. While our strength was across multiple hyperscale accounts, we also saw improved activity with our largest cloud customer following several quarters of softer demand. Our cloud pipeline remains strong, but we are optimistic regarding the outlook for our wide area solutions, particularly in areas where we maintain incumbency, and are well positioned to benefit from forming a big tailwind, that are likely to start ramping later this year. And for the year, we are confident in our outlook for our automated WAN solution and we expect 2021 results to be slightly above the high-end of the long-term forecast range we provided at our February Investor Day, calling for a 1% decline to 3% growth.
While our cloud-ready data center solutions declined 10% year-over-year during Q1, orders grew nearly 30% year-over-year due to broad based strength across our Cloud, Enterprise and Service Provider customers. Win rate improved and we saw a material increase in average deal size in the quarter. Apstra exceeded our expectation, and is already enabling us to win data center opportunity we likely wouldn't have been able to secure if we hadn't completed the deal in January. Customer interest in our cloud-ready data center portfolio is high, and we remain optimistic regarding the outlook for this business.
While the Q1 revenue decline in our cloud-ready data center business was almost entirely due to expected weakness at a singl