I also do this. Xfinity went out for a few hours earlier this month and Unifi failed over almost instantly, and within minutes we had high speed internet once I upgraded us. The standby mode would have been plenty for basic web browsing, too.
$5/mo for pretty guaranteed connectivity, plus being able to take it around with me on travels is pretty awesome.
I was paying for gigabit with the local ISP and it slowed down and lost connection so frequently I bought a Starlink (the regular one, not the mini) as a "backup."
As per the usual, my internet went down and I switched to the backup Starlink. After working with it for about a week I cancelled my ISP.
Turned out around 350MBPS down was fine for everything I was doing (and it's way more reliable).
XFinity has been terrible lately, and I have a Starlink Mini. XFinity failed today, and I did fallback for a few hours on the Mini. Connectivity was actually better than fiber. If only it worked when it is cloudy -- for $50 on roaming, that's a no-brainer given the exorbitant cost of living in northern cal.
How likely is it that this $5 deal will continue in the future? It sounds like a no-brainer WAN backup option, are Starlink going to discontinue it when they realise that people are using it as such?
Also, is this available globally or UK-only? I can't find any mention of it on the local Starlink site.
It's $5 for every month where you don't actually use it. If they are still subsidizing the hardware cost, that's probably where that money goes. If you actually use it you pay regular price for that month
I don't see how this would be a bad deal for Starlink
Well you are actually using it, just at 500kbps. Oh, we used to DREAM of 500kbps. Would have been lightspeed to us. We used to live in an old water tank on a rubbish tip with a 9600bps dialup modem, IF WE WERE LUCKY!
There are probably cheaper options, especially if you want to literally use your smartphone as the hotspot, but the Verizon home backup internet plan I looked at recently is $20 a month (and gives you 7 24-hour periods per month of unlimited data).
The Verizon home router is included when you sign up (you have to return it if you cancel). I bought it out of desperation when my home fiber internet was down all weekend due to a local tech screwing up and unplugging my house from the breakout box on the curb, but given the cost and the normal reliability of my home internet it’s really barely worth it.
I prefer having a 2nd wired connection as my backup. The satellite connection has some clear benefits, but it's still going to outer space. A DOCSIS failover won't suffer from rain fade or a something landing on the antenna.
If I've got a situation so bad it takes out both of my connections I've probably got bigger things to deal with than internet access.
The buried fiber getting cut by is really the only thing that kills the connection. Fiber can go for a long time without power from the local grid infrastructure. My cable provider has a mostly orthogonal failure mode (goes down like clockwork with the grid).
Man, that 500kbit/s is quite generous for that price, can easily be used to access CCTV cameras in remote areas. I currently use LTE for that and it's 10 eur for 15GB data cap per month for that use case
A mobile failover would be cheaper and would give you better connectivity in heavy rain.
A 4G dongle can be purchased for $15, rather than $200 for a Starlink Mini. Then, let's say your main internet source fails and you need to actually use the backup plan beyond the standby amount of 0.5 Mbps. That will cost you a minimum of $50 for Starlink, versus roughly $25 for a month of unlimited cell service. As for standby costs, you can find phone plans for $5 per month tat give a small amount of fast data, as opposed to Starlink's unlimited amount of slow data.
But of course this only works for areas that actually have cell service.
If you're in a rural area (and heck, even in an urban era) the primary ISP of a region dropping is likely to cause a lot of congestion from cellphones falling back to the operator network.
I found it quite absurd that Spectrum (my cable operator) wants to sell me a modem with integrated 5G/4G backup knowing that as soon as the cable plant drops, hundreds of local phones are going to congest the network as well and my "Invincible WiFi(tm)" will end up dead as a dodo.
I'll just throw a Peplink up and throw the cable and Starlink into it and run that as my load balancer.
> A mobile failover would be cheaper and would give you better connectivity in heavy rain.
When I was living in the rural seaside (literally grapes growing in front of the sea: nice place), when a bad electricity outage would happen it'd take down everything, including the only cell tower we'd be connected to. So no Internet, no mobile phone. No nothing but the laptop's batteries.
There are also people who have the same ISP as the company giving them their phone number: about a year ago in my country (highly modern, western EU country) a major carrier went down for a few hours. Electricity kept working but all the people on that ISP and mobile phone carrier were sorry out of luck. Most shops couldn't accept payments anymore (except cash but people don't use that much here).
Failover on mobile is, for many, the same thing as no failover at all: you may as well not even bother.
Satellite failover, on the other hand, is quite harder to disrupt.
The issue is that mobile is easily overloaded if those around you are also failing over onto it. There are only so many channels available per sector. In my experience, when one of the two incumbent carriers in my area goes down, mobile is immediately useless as a backup.
I'm currently using 4G as a backup and the Starlink Standby plan would definitely be cheaper. Only by a few dollars, but still cheaper, and unlike the cellular plan there's unlimited bandwidth while with the cell plan I'm relying on rollover data accumulating during periods of non-use to cover when it's being used.
Every so often I do the numbers on a backup Internet connection and decide that it's not worth it, but understand that it is useful for peace of mind reasons. My Internet is just too reliable. When I'm out of contract with my current provider I'll need to reconsider this as the supplier I'm likely to move to has no obvious/simple/integrated backup option.
tl;dr FTTP. A single outage event in 16 months, lasted 40 minutes, whilst asleep.
I'm in the UK and have FTTP through BT. Way back when I also purchased the 4G backup option (Hybrid Connect) that comes with this service. That's an extra £7.50/mo when taken as part of the usual 24-month contract. It's simple to setup and doesn't require any specific maintenance.
Looking back at the logs it's clear (from an actual usage perspective) it's not been worth the £7.50/mo I've been paying for it, but I'll admit it helped give me peace of mind when I was on-call for work so it is easy to justify.
The BT supplied router (which is required if you want to use their 4G backup hardware) keeps a log of "Resilience events".
In the 16 months I've had FTTP it has had exactly one "resilience event". A 40m11s outage that started at 00:20:05 on 28/11/2025. I was unaware of this outage as I was asleep.
It was really useful when I moved house though. I was in the middle of a 24-month contract with BT at my old address so I ported my contract to my new address. This meant they had to come round and install FTTP at the new property, which they couldn't do for a couple of weeks, so I was without home Internet for these two weeks.
Luckily the 4G "Hybrid Connect" backup device wasn't geo-locked (or if it was maybe BT overlooked it given there was an outstanding "Moving house" order on the account) and so it worked perfectly for the ~2 weeks between moving in and FTTP being installed. If this hadn't worked then a temporary 4G router would have worked just as well.
I had a bunch of "resilience events" for this period (it wasn't one continuous event as I was moving/restarting the broadband router for various reasons). During those 13 days the logs show 163GB download and 25GB upload. That's an average of ~150KBps (note the capital B there, in bits-per-second it is ~1.1Mbps) download.
In the 26 months prior to moving (where I was on ~75Mbps FTTC with BT) I had 3 "resilience events". 17m36s, 47m7s, 31m22s. All between midnight and 4am where I wouldn't have noticed, these were also within 1 month of each other, the other 25 months had no problems at all. None.
When my current contract comes to an end I'll move to a different supplier (probably Community Fibre as I can get symmetric 5Gbps for less than I'm paying BT for 1Gbps/120Mbps) and then not worry about a backup. If it is less reliable then I'll look for a solution then.
My current backup is simply to hotspot on my mobile with 5G (good signal here). Doesn't help the others in the house but they can fend for themselves. Neighbours have different suppliers or technologies (DOCSIS vs FTTP) so swapping wifi details would also be an option.
As others have pointed out, a local power-cut that takes out of the FTTP cabinet could easily take out the local 4G/5G masts making a 4G backup solution useless. If this happens I can just take my laptop to a nearby cafe or the co-working space I use. That kind of outage is very rare though round here.
Then again with the sums involved (under £10/month extra) it may just be easier (for peace of mind again) to just plump for something that doesn't really make amazing financial sense as it's just the cost of a pint or two a month.
I was with a small company called BRSK who did the FTTP rollout in my area, I think they have changed hands a few times now, but the sheer reliability was legit 5-9s. I don't legally fully understand how small companies ended up getting lots of money from the government for FTTP but they absolutely crushed it in my area. Shame they got mega review-bombed because they installed telegraph poles outside people's houses and that's apparently evil
> Set IPv6 Connection to SLAAC (this is critical - SLAAC must be used, not DHCPv6) [...] Set 'Prefix Delegation Size' to 56
Is this also A UniFi bug, is Starlink doing IPv6 address assignment in a weird way, or is this a normal/RFC-compliant way of assigning a /56 subnet to a router?
I always assumed routeable prefixes on v6 require DHCPv6 (except for hacks like RFC 7278 and /64 subnets)?
I think that section left out some details. On my Unifi setup, the router's IPv6 connection is configured with DHCPv6 (SLAAC isn't even an option) while the local networks are configured with SLAAC.
I have a GL.iNet travel router. When I am not travel, it connects to the router's second WAN port. If my main internet goes down, it takes me 30 seconds to tether my phone and failover manually. My carrier detects and throttles hotspot traffic by measuring packets TTL, so I tweaks the router's iptables to dodge that. Typically I get over 400 Mbps.
From time to time I get the itch to improve my home network uptime, and I have to keep reminding myself that the current setup is fine.
I live pretty rural and starlink has been worth the price over the last few years. When you compare it to dialup or hughesnet or viasat, it just works.
I was looking at the Standby plan a few months ago. There was some talk as to needing to activate it to full speed and price at least once per year or pay an extra fee which makes it a lot less attractive.
Whatever one might think about Elon Musk's posts on X, the engineering and achievements coming out of SpaceX are genuinely extraordinary and deserve a lot of respect.
We've used this in San Francisco to great effect. Once the Internet went down and I took our portable battery to the roof with the Mini and my wife was only a few minutes on her phone hotspot before she was able to have meetings normally. Great functionality.
The use case varies but for what it’s worth, most major cellular provider in the US offer fallback Internet plans. Ranges from 10-20 a month depending if you already have a line with them. AT&T has an interesting one where your phone lines hotspot is free and unthrottled whenever your fiber is impacted.
And yet again 50% of the work is working around IPv6 nonsense. I long for the day when we give up on it and try again (with proper DHCP and proper support for NAT)
I wish I had an excuse to actually need this much uptime at home. It's not the hardest thing to jump over to my phone as hotspot the very few times I need it to work.
Would be easy for unit to go over 50 C due to combination of heat from the sun and heat generated from the electronics. Where I am, temperatures of 30 C are common - in the shade.
I use Starlink as a backup provider, have done loads of work to tunnel public IPs via it, automatically fail over traffic etc, yet had no idea they supported public IPv6 subnets until reading this article.
I've just done something similar in response to a heavy storm that's taken out the fiber where I live (7 weeks now, still hasn't been reconnected). Starlink has been a life saver and works flawlessly (~200Mbps, <35ms latency) but I've also added a cheap 4G data SIM in to the mix too for extra resilience (no 5G coverage where I am but 4G gets ~45Mbs with an external antenna).
Had to get this going quickly so used tplink gear as it was readily accessible and surprisingly it's worked quite well. Used an NX210 (for WiFi to house and the backup 4G sim). Connected the NX210's WAN to an ER605, with Starlink router in WAN1 (in bypass mode) and fiber router in WAN2. This gives me instant fail over across all three and the option of load balancing across fiber and starlink (whenever the fiber comes back). Last step was to get an EAP211 so I could share my starlink over to a neighbour who also lost their fiber after the storm. That has worked well too.
* I'm using a residential starlink plan with the full dish (not mini), mounted with their pipe adapter accessory
53 comments
[ 6.5 ms ] story [ 61.8 ms ] thread$5/mo for pretty guaranteed connectivity, plus being able to take it around with me on travels is pretty awesome.
As per the usual, my internet went down and I switched to the backup Starlink. After working with it for about a week I cancelled my ISP.
Turned out around 350MBPS down was fine for everything I was doing (and it's way more reliable).
Also, is this available globally or UK-only? I can't find any mention of it on the local Starlink site.
I don't see how this would be a bad deal for Starlink
It's in available on most plans in most locations, with some restrictions described here: https://starlink.com/ca/support/article/37bb3b47-9525-7224-5...
Depending on your area you don't even need an external one. A simple 4g dongle would do.
The Verizon home router is included when you sign up (you have to return it if you cancel). I bought it out of desperation when my home fiber internet was down all weekend due to a local tech screwing up and unplugging my house from the breakout box on the curb, but given the cost and the normal reliability of my home internet it’s really barely worth it.
Big Oligarchs are not your friend and some of them are way worse than Musk, partially because they keep their cards close to their chests.
If I've got a situation so bad it takes out both of my connections I've probably got bigger things to deal with than internet access.
The buried fiber getting cut by is really the only thing that kills the connection. Fiber can go for a long time without power from the local grid infrastructure. My cable provider has a mostly orthogonal failure mode (goes down like clockwork with the grid).
A 4G dongle can be purchased for $15, rather than $200 for a Starlink Mini. Then, let's say your main internet source fails and you need to actually use the backup plan beyond the standby amount of 0.5 Mbps. That will cost you a minimum of $50 for Starlink, versus roughly $25 for a month of unlimited cell service. As for standby costs, you can find phone plans for $5 per month tat give a small amount of fast data, as opposed to Starlink's unlimited amount of slow data.
But of course this only works for areas that actually have cell service.
I found it quite absurd that Spectrum (my cable operator) wants to sell me a modem with integrated 5G/4G backup knowing that as soon as the cable plant drops, hundreds of local phones are going to congest the network as well and my "Invincible WiFi(tm)" will end up dead as a dodo.
I'll just throw a Peplink up and throw the cable and Starlink into it and run that as my load balancer.
My cell is unusable.
When I was living in the rural seaside (literally grapes growing in front of the sea: nice place), when a bad electricity outage would happen it'd take down everything, including the only cell tower we'd be connected to. So no Internet, no mobile phone. No nothing but the laptop's batteries.
There are also people who have the same ISP as the company giving them their phone number: about a year ago in my country (highly modern, western EU country) a major carrier went down for a few hours. Electricity kept working but all the people on that ISP and mobile phone carrier were sorry out of luck. Most shops couldn't accept payments anymore (except cash but people don't use that much here).
Failover on mobile is, for many, the same thing as no failover at all: you may as well not even bother.
Satellite failover, on the other hand, is quite harder to disrupt.
tl;dr FTTP. A single outage event in 16 months, lasted 40 minutes, whilst asleep.
I'm in the UK and have FTTP through BT. Way back when I also purchased the 4G backup option (Hybrid Connect) that comes with this service. That's an extra £7.50/mo when taken as part of the usual 24-month contract. It's simple to setup and doesn't require any specific maintenance.
Looking back at the logs it's clear (from an actual usage perspective) it's not been worth the £7.50/mo I've been paying for it, but I'll admit it helped give me peace of mind when I was on-call for work so it is easy to justify.
The BT supplied router (which is required if you want to use their 4G backup hardware) keeps a log of "Resilience events".
In the 16 months I've had FTTP it has had exactly one "resilience event". A 40m11s outage that started at 00:20:05 on 28/11/2025. I was unaware of this outage as I was asleep.
It was really useful when I moved house though. I was in the middle of a 24-month contract with BT at my old address so I ported my contract to my new address. This meant they had to come round and install FTTP at the new property, which they couldn't do for a couple of weeks, so I was without home Internet for these two weeks.
Luckily the 4G "Hybrid Connect" backup device wasn't geo-locked (or if it was maybe BT overlooked it given there was an outstanding "Moving house" order on the account) and so it worked perfectly for the ~2 weeks between moving in and FTTP being installed. If this hadn't worked then a temporary 4G router would have worked just as well.
I had a bunch of "resilience events" for this period (it wasn't one continuous event as I was moving/restarting the broadband router for various reasons). During those 13 days the logs show 163GB download and 25GB upload. That's an average of ~150KBps (note the capital B there, in bits-per-second it is ~1.1Mbps) download.
In the 26 months prior to moving (where I was on ~75Mbps FTTC with BT) I had 3 "resilience events". 17m36s, 47m7s, 31m22s. All between midnight and 4am where I wouldn't have noticed, these were also within 1 month of each other, the other 25 months had no problems at all. None.
When my current contract comes to an end I'll move to a different supplier (probably Community Fibre as I can get symmetric 5Gbps for less than I'm paying BT for 1Gbps/120Mbps) and then not worry about a backup. If it is less reliable then I'll look for a solution then.
My current backup is simply to hotspot on my mobile with 5G (good signal here). Doesn't help the others in the house but they can fend for themselves. Neighbours have different suppliers or technologies (DOCSIS vs FTTP) so swapping wifi details would also be an option.
As others have pointed out, a local power-cut that takes out of the FTTP cabinet could easily take out the local 4G/5G masts making a 4G backup solution useless. If this happens I can just take my laptop to a nearby cafe or the co-working space I use. That kind of outage is very rare though round here.
Then again with the sums involved (under £10/month extra) it may just be easier (for peace of mind again) to just plump for something that doesn't really make amazing financial sense as it's just the cost of a pint or two a month.
Is this also A UniFi bug, is Starlink doing IPv6 address assignment in a weird way, or is this a normal/RFC-compliant way of assigning a /56 subnet to a router?
I always assumed routeable prefixes on v6 require DHCPv6 (except for hacks like RFC 7278 and /64 subnets)?
From time to time I get the itch to improve my home network uptime, and I have to keep reminding myself that the current setup is fine.
Would be easy for unit to go over 50 C due to combination of heat from the sun and heat generated from the electronics. Where I am, temperatures of 30 C are common - in the shade.
Had to get this going quickly so used tplink gear as it was readily accessible and surprisingly it's worked quite well. Used an NX210 (for WiFi to house and the backup 4G sim). Connected the NX210's WAN to an ER605, with Starlink router in WAN1 (in bypass mode) and fiber router in WAN2. This gives me instant fail over across all three and the option of load balancing across fiber and starlink (whenever the fiber comes back). Last step was to get an EAP211 so I could share my starlink over to a neighbour who also lost their fiber after the storm. That has worked well too.
* I'm using a residential starlink plan with the full dish (not mini), mounted with their pipe adapter accessory
Reminds me of the good old days of the internet.
I also migrated to Starlink recently and quite like the service so far.