##HOT## Download Uplink

Excellent, this is the detail I was looking for. Went digging around on the uplink configuration/SD-WAN configuration docs but they don't have much mention of this feature. Was apparently looking at the wrong docs.

No, 3G or 4G modem cannot be used for this purpose. While the MX supports a range of 3G and 4G modem options, cellular uplinks are currently used only to ensure availability in the event of WAN failure and cannot be used for load balancing in conjunction with an active wired WAN connection or VPN failover scenarios.

Download Uplink

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Asking because I'm having some trouble testing this feature at a remote location, which is using a full-tunnel AutoVPN back to our concentrator(s). Seems like AutoVPN isn't detecting the cellular uplink, or isn't establishing across it.

Have you tried running a packet capture on the Internet side of the MX, to see what the cellular interface is sending & receiving to/from the Hub? This would likely be Support's first ask - so worth doing in advance. Take a look at the firewall logs at the Hub site too - see if any tunnel-related packets from the Spoke are being changed in transit by the carrier. This because, with cellular uplinks, you often run into CG-NAT related issues, which often stops tunnels from forming properly. You may need to set up the destination Hub (and any upstream firewall) to work with Manual NAT traversal, tying VPN to a specific public IP and port (I recommend picking one between 1025 and 32768, but avoiding 4500) as per -to-site_VPN/Site-to-Site_VPN_Settings#NAT_Traversal

When I run a throughput test it will provide one number. When I look at the Uplink traffic during the time of the test it always shows higher sometimes by 10s of Mbs. I was assuming that the throughput test shows download speed and the Uplink shows total download and upload. Is this correct or am I bearing out an old adage? If I am wrong what is the cause of the difference between the uplink traffic and the result from the throughput test?

Also you need to consider the measurement basis. I don't know, but the speed test might be av instantaneous reading, or an average over the duration of the test, while the uplink results might be a 60s (or some other period) average.

Good point. On investigating they both show the measurement in Mbps. I also look at the Uplink traffic bandwidth usage before and after the test. The off test bandwidth usage appears to be less than the difference between the throughput test result and the uplink traffic. Would it be safe to assume that could be upload that is being used during the test. That the throughput test does also kinda tests upload bandwidth?

In my experience the throughput has always just been the down speed. No indication of upload speed. But I stopped using that test in lieu of running from a client machine since I typically need to know the circuits upload capabilities as well. Also if you have two WAN connections that tool doesn't give you the ability to select which one you want to test the throughput on. So it'll likely just use whichever you have specified as the primary uplink.

Rebooting the modem, for a very short time, will help, but the error will come back and my service will go back to being very slow/sluggish, pages take forever to load, and overall very poor performance. I will have red X under going across the 'uplink' section of the row.

Shortly after my last reply and reboot, I went ahead and rebooted for a 3rd time, and so far, now going on 6 hours, there has been NO uplink error code popping up. This time, instead of rebooting from the system control center, I went ahead and completely unplugged the modem for several minutes.

It's funny though because now that I think about it, several weeks ago I had pulled out my computer desk so that we could install a 'Joey' (Dish Network) receiver to a TV that is sitted up on top of the computer desk hutch, and I THINK that in the process of pulling out the desk, we may of inadvertently, and ever so slightly, tugged on the DIN cord which caused the uplink issues...

Hello Johnie Steve,

Thank you for reaching out to the community, if you have both the interfaces set to the Active Interfaces box then uplink balancing automatically organizes the balancing between those interfaces. And with the equal weight of 100 on both the interfaces, a weighted round robin algorithm is used for this. With the persistence of 5 mins meaning it will ensures that traffic having specific attributes is always routed over the same uplink interface.

I have played around with the configuration a bit with no luck. However I noticed when changing the max data rate in the Service Profile in ChirpStack from 3 to 2 it almost completely eliminated the frame increment errors, however I still see this error every 20 uplinks or so.

Unfortunately not an answer to your question, but I have faced the same/similar issue with my devices as well. In theory: This error is supposed to trigger at the event of a replayed uplink packet. However, I have seen it trigger so often and from different devices that I doubt it is actually a replay attack.

I spent a lot of time trying to figure out the source of the problem and at this point I am almost giving up.

In my case, I get a few of these retransmission errors per device after a successful uplink, this happens for a few uplinks and then they stop showing for a while. The timings between the retransmissions are consistent, as well as the timings for the periods of uplinks that are followed up by these errors.

I tried it already but the uplink port group is mandatory. A NIC doesn't actually have to be assigned to it but I'm a little uneasy of any possible related issues of not having any. Also, what happens with options such as Network I/O Control, Egress/Ingress Traffic Shaping and Load Balancing? They all are basically functions of the uplink port group either with the distributed port groups or the physical ports?

How does traffic flow? Y'know, given the uplink port group thingy. Does it need to go up and out like in a star topology (A in my little doodle above) or from distribport to distribport? Is the data flow governed in C or D when NIOC is being used? It's not compatible with NFS4.1 if I remember correctly, so I'm sort of thinking D, but I'm here to learn, so please correct me!

Hey Mate, how are you, hope you are doing fine.

First of all, the uplink portgroup is mandatory, basically, it "simulates" the uplinks of a physical switch and it maps to a NIC.

Why would you have a Physical that has no uplinks? I don't think it is very useful unless you want to keep your machines connected between them but with no external access.

A NIC doesn't actually have to be assigned to it but I'm a little uneasy of any possible related issues of not having any.

This is correct, the issue you will face here is that all the VMs in VLAN4095,3450,3451 and 3452 will be disconnected from the network.

Also, what happens with options such as Network I/O Control, Egress/Ingress Traffic Shaping and Load Balancing? They all are basically functions of the uplink port group either with the distributed port groups or the physical ports?

At a higher level they are handled by the vDS, for Load Balancing you can set specific policies per distibuted portgroup, as for the others I'm not 100% sure.

As for the traffic flow:

Yes, it needs to go up. But not to the portgroup, It will go to the pNICs, then to the pSwitch and it will be routed back to the Appliance.

Is the data flow governed in C or D when NIOC is being used? Neither C or D, it is governed by the vDS.

As for the NFS 4.1 and NIOC compatibilitly this post says it is compatible.

Using both Storage I/O Control & Network I/O Control for NFS - VMware vSphere Blog

Let me know if this was useful.

I wanted to connect them but using another VM with its own passed-through NICs. I've had DMZ-style virtual switches, they've worked fine and they're actually kind of awesome because they trapped in the virtual environment, there's no wiring, and can do all sorts of setups, they weren't distributed virtual switches though so it mandatory uplink threw me off this time and as I progressed came the options for the load balancing, then I remembered about NIOC and all that so I better came here to ask. 2351a5e196