I’ve had around two weeks of significant issues since joining Rise Fibre on an Openreach full-fibre line. I am moving to a new ISP after giving notice in my cooling off period.Initially I suspected their use of CGNAT (no public IPv4 address) was the cause. To their credit, Rise provided a static IPv4 address free for two years (normally £5/month), but unfortunately this did not resolve the problem.After extensive troubleshooting, the connection only became stable when I manually reduced advanced packet size settings on my own router. This effectively forces the connection to run below normal performance levels just to work reliably.Because Rise’s supplied router locks these settings, most customers will never see this behaviour. It is likely the ISP router is automatically compensating behind the scenes rather than the underlying issue being fixed.👍 Positives• Competitive price• Uses Openreach FTTP• Static IPv4 offered free for two years when requested• Works for basic use with the supplied router except they bricked mine at the end of the second week. 👎 Negatives• Slower download and upload speeds than my previous ISP on the same fibre line• Stability issues out of the box• Uses CGNAT by default• Very limited support for third-party routers• Poor communication and missed callbacks• Required repeated chasing for updatesI was confident my equipment was configured correctly and provided detailed technical information about the issue, but received little feedback or progress updates. Tip for Anyone Using Their Own Router:If you plan to use third-party equipment:• Get your PPPoE username and password from your Rise online account• Leave DNS set to automatic• Consider disabling IPv6 (Rise does not appear to use it currently)• If web pages fail to load, speed tests stall, or devices randomly drop out, reduce the MSS (packet size) settingThe normal value is 1452, but lowering it to around 1380 may restore stability (though this can reduce performance). OverallRise Fibre is inexpensive and adequate for everyday browsing and streaming if you use the supplied router and performance is not your top priority. However, my experience suggests speeds, reliability, and support may fall short of other providers on the same Openreach infrastructure, especially for more advanced users.“Rise will not support 3rd party routers”
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