05-07-2020 11:21 AM
Just wanted to get something on the forum that might be a benefit to others running into the situation I've run into with a number of Telus business and home clients. The problem occurs when you want to bypass the ActionTec router that Telus provides and use your own. The ActionTec can either be in bridge mode or removed from the circuit completely and firewall/router duties replaced by your own on-premises device. In our case, all the affected circuits had the ActionTec replaced by Sonicwall firewalls. The main symptom is that the connection appears to drop periodically and no traffic is received by your on-premises firewall from the Telus gateway. Monitoring the connection showed that the connection would go down every 37 minutes precisely from the time it was reset (a simple unplug of the Internet cable usually did the trick). If left on its own, the connection would resume 2 hours and 53 minutes later, and the cycle would continue. Telus support was of no help at all, unsurprisingly, but analyzing packet captures revealed unusual ARP (Address Resolution Protocol) behavior. Sonicwall support confirmed that the problem was a "non-standard implementation of ARP". When I contacted Telus, they eventually confirmed that ARP was disabled on the circuit and is disabled on every circuit that the ActionTec T3200H router is deployed on. After Telus enabled ARP on the circuit, the connection stabilized completely. ARP is an essential last hop protocol and should never be disabled but, for some reason, Telus chooses to disable it. Consequently, it causes drop-out problems in moderately more sophisticated home and business environments that need more functionality than the simple ActionTec modem provides. Note that Telus will enable ARP on a business service but will not on a residential service, so in that case you're stuck with the ActionTec modem. Normally this is not a problem, but if you need more sophisticated services such as a VPN, you're simply out of luck. The only solution for a home user is to upgrade your circuit to business and have Telus enable ARP. I suppose you could downgrade to residential without losing the ARP setting but haven't tried. Hope this saves someone from the hours of work I had to do to figure it out. Telus was of very little help, sadly but unsurprisingly.
05-09-2020 02:22 AM
05-09-2020 11:13 AM
If using the ActionTec router in bridge mode works for you, I'd recommend you just go with it. The router is really just a dumb layer 2 device in that configuration. What sort of pattern are you seeing with dropouts? How long is the connection up before it drops? Have you run a packet capture on the circuit?
05-09-2020 07:21 PM
05-10-2020 10:44 AM
Look for a conversation between the Telus gateway and your device that might indicate a lack of response from one side or the other just before an outage. Not sure why you think there is a security issue with the ActionTec in bridge mode but if it's non-negotiable, just replace the ActionTec modem with your own small smart or dumb gigabit switch. I've seen an intermediate switch solve drop out issues on Telus circuits.
05-10-2020 11:41 AM
05-10-2020 11:53 AM
05-10-2020 12:04 PM
So you're trying to eliminate both the Telus ActionTec router and Lucent transceiver and go directly from the Ubiquiti router into their fibre network? Brave man. Totally unnecessary, but whatever. The TP-Link transceiver should work but you might want to try a different SFP module before you spend any money on something that may or may not work.
05-10-2020 12:08 PM
05-10-2020 06:47 PM
05-25-2020 07:03 PM
We're an IT company, and run into this issue all the time. It's maddening! We've fixed with a few times with MAC spoofing or having Telus add a static DHCP entry to their servers. In a few of those cases, neither of those worked, and Telus lost a customer over it.
Interesting about the ARP, and the small switch between Telus and the router ideas. We're currently fighting with a connection in Vernon, BC that the MAC spoof and static routes didn't help with. We'll have Telus enable ARP. We're putting in a small switch anyway, since the client wants to run a separate router for their automation and music stuff. Hopefully one of those does the trick, or Telus is going to lose another customer.
It's sad that Telus can't just follow standards. They're constantly screwing with stuff to force people to do things their way. The use of static DHCP entries for static IPs, for example. Why? Just give us static IP information, so we're not at the mercy of DHCP! Or the deliberate rejection of renewal of the current IP, forcing an IP change when renewing IPs - which is a violation of the DHCP standard - to make it difficult to run a server on a business connection without registering the MAC with them. That also messes with VPNs and other outgoing traffic that breaks when the IP changes. These things are just stupid and unnecessary.
Telus is so Mickey Mouse. Just consumer grade nonsense. If it wasn't for the fact that they're the only game in town for cheap fiber, I'd be all over other providers. I can't wait for other providers to be able to resell PureFiber. The second that happens, Telus is going to see a bunch of client migrate the next day.
05-26-2020 10:36 PM
Telus does do things its own way, to the point of frustration. In their defense, they're deploying for the lowest common denominator and really aren't setup to handle more advanced small business or consumer setups, mainly by design. Keeps costs down and profits up.
06-02-2020 03:39 PM
Just a quick update.
We finally got Telus' systems to be happy with the SonicWALL for our client.
Initially, we'd called Telus and had them enable ARP, which didn't help. We then put in a small HP OfficeConnect 5-Port switch between the Nokia and the SonicWALL. That didn't help either. We called Telus back, and got a different tech. It turned out the first guy didn't enable ARP, like he said he had. The second tech enabled it, and the connection has been stable ever since. ARP not being enabled was the issue.
ARP is required on a network for things to work, unless static ARP is being employed - which of course won't work if the router being communicated with hasn't been instructed to keep the ARP entry it makes for the SonicWALL. As soon as the dynamic ARP entry expires, traffic flow stops. This is just boneheaded on Telus' side. They do this seemingly randomly (though often) on the PureFiber network. There's just no reason to do this and generate support calls where the technician has no idea what the problem is, because they're not receiving training on a very common issue. That is very annoying.
At least we now know what the issue is, and can have Telus address it out of the gate from now on - so, thank you, rf94z. 🙂
06-02-2020 05:15 PM
Glad it worked for you. Agreed, Telus support is pretty low grade, really hit and miss. For people like yourself that have a solid networking background, it's even worse because once you penetrate that first layer of support and get escalation, you hit a brick wall of bureaucracy where they're loathe to change anything despite the evidence you might have that Telus is the problem. Not my favourite provider for that reason but I do like the robustness of the service once it's working.
07-25-2020 11:26 AM
Just went through another Telus Business Fibre deployment, bypassing the Telus router directly to a Sonicwall firewall. As part of the installation order, I requested that ARP be enabled on the circuit and was assured it was. Yet I had the same symptoms, ~37 minutes uptime followed by ~2 hours, 54 minutes downtime. Contacted Telus support five times, waited on hold probably 5 hours total. Each time I was told that ARP was enabled. It wasn't. I finally reached someone competent in the Fibre division who said it wasn't enabled and enabled it for me, which immediately fixed the problem. Of course, the process took two full days to play out. Bottom line: don't get fooled by Telus' protestations that ARP is enabled if you continue to see these symptoms. Insist that it isn't until you get someone competent who can fix it. Start by calling the Fibre support line at 888-310-2267. Refer them to this thread if you need to.
The bigger moral to all this is that, if you need support beyond the mundane level 1 issues, Telus will give you the worst technical support out there. Not just in the industry, but overall. I'd rather deal with the federal government. Bunch of employees who don't seem to want to help resolve your issue, just want to move on to the next easy call. Long holds, dropped calls, transferring around, finger-pointing, uneducated agents. If you have the opportunity to get a similar service from a competitive provider, do it, even if you have to pay more. Telus' glossy marketing veneer belies an incompetent beast below. They don't deserve your business.
04-04-2021 03:05 PM
Thank you for this extremely valuable info!! Are you taking the "naked" fibre SFP connection directly into the customer owned router (Sonicwall, in your case, I want to use Ubiquiti) or is it going to the Nokia equipment then ethernet to your Sonicwall?
06-11-2021 10:40 AM
You may not have the problem with a Ubiquiti firewall. I've just used the Telus-provided Nokia fibre transceiver but there's no reason you can't eliminate it and use your own SFP port.
09-12-2020 02:44 PM
Props to you, rf94z, and to Paul Reid for taking the time to post this issue.
I had the exact same 37:00 up, 2:53:36 down problem with our Sonicwall router on a new fibre install. Thanks to the information you guys posted I was able to point the Telus tech to the "enable the ARP port" solution and get it resolved quickly. Fortunately a tier 2 tech answered the call had some past experience with similar issues - really cut down on the time spent finger pointing before we got down to having it fixed by tier 3.
One thing I'll add is that enabling the ARP port didn't immediately fix the connection and get me ping response. They also had to power cycle the Nokia modem.
07-06-2021 01:51 PM
Thank you for this detailed post and thread. I am a residential fibre customer and have been suffering these disconnects for a couple of years now and finally was able to find a resolution once you pointed me towards the ARP issue.
The Sonicwall TZ400 has some "undocumented" options which include allowing for some less than secure behaviours. I enabled Open ARP Behaviour on the TZ400 that allows it to respond to ARP requests from 0.0.0.0 Depending on your use case this may or may not be a good idea. It's entirely possible that I do not fully understand the security implications of doing this either.
Further, I asked them for their Actiontec device but instead of putting it in bridge mode I just put it away and deployed its MAC address on the TZ-400 WAN interface. It's been over a week of a stable Fibre connection in over two years.
I did try using the Actiontec in bridge mode but it wasn't enough and I had to still configure the Sonicwall TZ400 to respond to ARP requests from 0.0.0.0 So I figured if that was the root cause then there was no need for this extra device. So I am back to SFP->Nokia ONT->TZ400->LAN etc