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I've just had the 500mbps Community Fibre package installed, and while the Linksy app speed test confirms the speed to be 500mbps up and down, my iMac running BigSur is only getting a fraction of this, and they're right next to each other, so I can't imagine what the problem is with the iMac?
Can anyone offer any suggestions?
Edited by MysticLady (Thu 04-Nov-21 18:58:47)
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which imac and are you using ethernet or wireless ?
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iMac (Retina 5K, 27-inch, 2017) / BigSur 11.6
Connection is via WiFi to a Linksy router.
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Register (or login) on our website and you will not see this ad.
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Can you try using the Ethernet port and re-run the same speed test
Also which linksys router?
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It's a Linksy Velop Tri-Band AC2200 / Tri-Band Mesh WiFi Node
Will have a try with an ethernet connection tomorrow. It's awkward as the router is in the next room.
My old BT router sat on my desk, and was always connected via ethernet. This is my first try with a WiFi connection.
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Ethernet is even slower (via speedtest.net):
Response time: 2 ms
Down: 88.7
Up: 92.39
I just noticed I set my DNS server to 1.1.1.1, 1.001 some time ago. I can't remember why. Could this be causing it?
Edited by MysticLady (Thu 04-Nov-21 20:30:18)
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Linksy app speed test results on iPhone:
Ping: 1 ms
Down: 516 Mbps
Up: 517 Mbps
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Ethernet is even slower (via speedtest.net):
Response time: 2 ms
Down: 88.7
Up: 92.39
To me that looks like a bad ethernet cable, forcing the link to 100Mbps instead of 1G.
If you open a terminal and type "ifconfig" you should see the speed next to each interface, probably the wireless is en0 and the wired en1.
e.g.
| Text | 1
23
4 | en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
... media: autoselect (1000baseT <full-duplex,energy-efficient-ethernet>)
status: active |
If it says "100baseTX" instead of "1000baseT" then that's your problem.
As well as a bad cable it could also be a broken RJ45 port in either your Mac or your router, but the cable is the first thing to replace.
I just noticed I set my DNS server to 1.1.1.1, 1.001 some time ago. I can't remember why. Could this be causing it?
No.
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My money is on the network cable too. Hopefully not a hardware fault with the iMac!
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iMac (Retina 5K, 27-inch, 2017) / BigSur 11.6
Connection is via WiFi to a Linksy router.
2.4g or 5g connected
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I'm not a mac person but currently the OP has
iphone at full speed
imac with big sur running at 100mbit/s or less
there may be potential cable issue, or hardware issue or big sur having issues (some users have had had speed issues)
@MysticLady Which version of Big sur are you on?
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there may be potential cable issue, or hardware issue or big sur having issues (some users have had had speed issues)
@MysticLady Which version of Big sur are you on?
I'm a multi OS user so use Macs, PC's and some linux.
I had big sur and had some issues with networking over wireless, some days 500+ others 250 or less, it would then resolve itself on a few reboots. Now it's a lot more stable on the newer versions but I strongly recommend upgrading to Monterey if you have no compatibility issues with other apps, make sure to test this.
Do you happen to have another mac or PC lying around you could run a test on over ethernet just to give us an idea?
Also not sure if anyone said but have you tried disabling your antivirus to run the tests as I have enterprise grade antiviruses and they really suck all the resources.
as the others said its probably the ethernet cable causing a problem, i would be tempted to say so myself.
Let us know how you get on
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I'm hoping the OP will come back tomorrow with the cable test - so we can rule that out, and then on the Big sur version. As some BigSur versions have, as you said had issues with networking. If Monterey is free of wireless networking issues then this is the way to for the op as long they don't face compatibility issues
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Apple BigSur 11.6.1
I don't believe it's the cable. Even standing next to the router and running the Fing app on my iPhone 7 it is reporting WiFi speeds of 90.6 Mbps down and 103.0 Mbps up.
I also tested the speed on a MacBook pro next to the router and got a slightly faster down rate.
Running a speed test via the Linksys app itself reports speeds of 500 Mbps up and down. Something isn't right with the way the router is configured perhaps?
I even called Apple yesterday and they said they could not see anything wrong with my iMac settings when sharing my screen. I spoke to a guy at Community Fibre too, but he didn't seem to have a clue.
I still have BT Wifi up and running, could that be interfering?
Here's what I get from ifconfig in Terminal:
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
options=1203<RXCSUM,TXCSUM,TXSTATUS,SW_TIMESTAMP>
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
nd6 options=201<PERFORMNUD,DAD>
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=50b<RXCSUM,TXCSUM,VLAN_HWTAGGING,AV,CHANNEL_IO>
ether 78:7b:8a:b1:df:46
nd6 options=201<PERFORMNUD,DAD>
media: autoselect (none)
status: inactive
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=400<CHANNEL_IO>
ether 98:9e:63:44:8f:22
inet6 fe80::c7b:c609:603f:2c6%en1 prefixlen 64 secured scopeid 0x5
inet 192.168.1.83 netmask 0xffffff00 broadcast 192.168.1.255
inet6 2a02:6b62:20a1:0:1029:32f3:8c69:65d3 prefixlen 64 autoconf secured
inet6 2a02:6b62:20a1:0:c80e:7a62:54f3:fc5a prefixlen 64 autoconf temporary
nd6 options=201<PERFORMNUD,DAD>
media: autoselect
status: active
en2: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
options=460<TSO4,TSO6,CHANNEL_IO>
ether 82:22:05:43:38:00
media: autoselect <full-duplex>
status: inactive
en3: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
options=460<TSO4,TSO6,CHANNEL_IO>
ether 82:22:05:43:38:01
media: autoselect <full-duplex>
status: inactive
bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=63<RXCSUM,TXCSUM,TSO4,TSO6>
ether 82:22:05:43:38:00
Configuration:
id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
ipfilter disabled flags 0x0
member: en2 flags=3<LEARNING,DISCOVER>
ifmaxaddr 0 port 7 priority 0 path cost 0
member: en3 flags=3<LEARNING,DISCOVER>
ifmaxaddr 0 port 8 priority 0 path cost 0
nd6 options=201<PERFORMNUD,DAD>
media: <unknown type>
status: inactive
p2p0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 2304
options=400<CHANNEL_IO>
ether 0a:9e:63:44:8f:22
media: autoselect
status: inactive
awdl0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1484
options=400<CHANNEL_IO>
ether 8a:a4:3a:2c:41:3c
inet6 fe80::88a4:3aff:fe2c:413c%awdl0 prefixlen 64 scopeid 0xb
nd6 options=201<PERFORMNUD,DAD>
media: autoselect
status: active
llw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=400<CHANNEL_IO>
ether 8a:a4:3a:2c:41:3c
inet6 fe80::88a4:3aff:fe2c:413c%llw0 prefixlen 64 scopeid 0xc
nd6 options=201<PERFORMNUD,DAD>
media: autoselect
status: active
utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
inet6 fe80::6370:2f97:ec48:6195%utun0 prefixlen 64 scopeid 0xd
nd6 options=201<PERFORMNUD,DAD>
utun1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 2000
inet6 fe80::22d6:74ad:8ce5:4348%utun1 prefixlen 64 scopeid 0xe
nd6 options=201<PERFORMNUD,DAD>
Edited by MysticLady (Fri 05-Nov-21 12:19:53)
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iMac (Retina 5K, 27-inch, 2017) / BigSur 11.6
Connection is via WiFi to a Linksy router.
2.4g or 5g connected
I'm not sure - how do I check? I think the router is set to "mixed" by default.
Edited by MysticLady (Fri 05-Nov-21 12:27:52)
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Mmm…that ifconfig output is not showing any network cable connected that I can see.
Can you disable WiFi on the iMac and please connect to the Community Fibre router using a direct network cable (Cat5e or Cat6 with RJ45 plugs) and redo both the speedtest and ifconfig command and repost the outputs. Thanks.
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iMac (Retina 5K, 27-inch, 2017) / BigSur 11.6
Connection is via WiFi to a Linksy router.
2.4g or 5g connected
I'm not sure - how do I check? I think the router is set to "mixed" by default.
On mac to check what frequency you are connected to you hold the option key and press on the WiFi icon in the Menu Bar, it will display a load of information about the channel, frequency, width, among other things could you let us know what channel and all of that information.
could you also share the "PHY mode" it will come up near the bottom of the list.
Not sure if it would be beneficial to ask for the noise rating as well as it could help to see if there is channel congestion?
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Using direct cable connection:
Speedtest.net:
Ping: 3 ms
Up: 89.38
Down: 94.99
ifconfig:
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
options=1203<RXCSUM,TXCSUM,TXSTATUS,SW_TIMESTAMP>
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
nd6 options=201<PERFORMNUD,DAD>
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=50b<RXCSUM,TXCSUM,VLAN_HWTAGGING,AV,CHANNEL_IO>
ether 78:7b:8a:b1:df:46
inet6 fe80::1008:cfe4:c747:3b0f%en0 prefixlen 64 secured scopeid 0x4
inet 192.168.1.91 netmask 0xffffff00 broadcast 192.168.1.255
inet6 2a02:6b62:20a1:0:145b:ee86:7523:ee50 prefixlen 64 autoconf secured
inet6 2a02:6b62:20a1:0:5f:c813:acae:8b31 prefixlen 64 autoconf temporary
nd6 options=201<PERFORMNUD,DAD>
media: autoselect (100baseTX <full-duplex,flow-control>)
status: active
en1: flags=8823<UP,BROADCAST,SMART,SIMPLEX,MULTICAST> mtu 1500
options=400<CHANNEL_IO>
ether 98:9e:63:44:8f:22
nd6 options=201<PERFORMNUD,DAD>
media: autoselect (<unknown type>)
status: inactive
en2: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
options=460<TSO4,TSO6,CHANNEL_IO>
ether 82:22:05:43:38:00
media: autoselect <full-duplex>
status: inactive
en3: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
options=460<TSO4,TSO6,CHANNEL_IO>
ether 82:22:05:43:38:01
media: autoselect <full-duplex>
status: inactive
bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=63<RXCSUM,TXCSUM,TSO4,TSO6>
ether 82:22:05:43:38:00
Configuration:
id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
ipfilter disabled flags 0x0
member: en2 flags=3<LEARNING,DISCOVER>
ifmaxaddr 0 port 7 priority 0 path cost 0
member: en3 flags=3<LEARNING,DISCOVER>
ifmaxaddr 0 port 8 priority 0 path cost 0
nd6 options=201<PERFORMNUD,DAD>
media: <unknown type>
status: inactive
p2p0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 2304
options=400<CHANNEL_IO>
ether 0a:9e:63:44:8f:22
media: autoselect
status: inactive
awdl0: flags=8902<BROADCAST,PROMISC,SIMPLEX,MULTICAST> mtu 1484
options=400<CHANNEL_IO>
ether 8a:a4:3a:2c:41:3c
nd6 options=201<PERFORMNUD,DAD>
media: autoselect
status: inactive
llw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=400<CHANNEL_IO>
ether 8a:a4:3a:2c:41:3c
nd6 options=201<PERFORMNUD,DAD>
utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
inet6 fe80::6370:2f97:ec48:6195%utun0 prefixlen 64 scopeid 0xd
nd6 options=201<PERFORMNUD,DAD>
utun1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 2000
inet6 fe80::22d6:74ad:8ce5:4348%utun1 prefixlen 64 scopeid 0xe
nd6 options=201<PERFORMNUD,DAD>
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I've also just just checked my iMac specs:
10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)
Wi-Fi
802.11ac Wi-Fi wireless networking
IEEE 802.11a/b/g/n compatible
Bluetooth 4.2 wireless technology
Edited by MysticLady (Fri 05-Nov-21 12:53:17)
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media: autoselect (100baseTX <full-duplex,flow-control>)
status: active
You're connected at 100Mbps - most likely a cable issue as has been said before.
 Comms is hard
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Would that be the cable that connects the wall mounted box to the router? There is a Huawei wall-mounted box connected via ethernet undeneath the Linksys router.
Edited by MysticLady (Fri 05-Nov-21 12:56:37)
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Let’s start with wired connection….
Your wired network connection (en0 on the output of ifconfig) is only connecting at a maximum link speed of 100 Mbps (see text.. “ media: autoselect (100baseTX )”). Therefore you won’t be able to get internet speeds beyond 100 Mbps whilst this persists.
To diagnose, Can you please plug into another LAN port on the router and rinse and repeat. If that does not alter matters then you need to try another network cable. They aren’t invincible unfortunately.
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No. The cable between your iMac and the router. See my post above.
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There is only the one ethernet port on the bottom of the router.
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In that case replace with a new/fresh cable between the router and your iMac.
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Interesting. Different cable attached.
Ping: 2 ms
Down: 377.00
Up: 181.97
and then again:
Down: 436.27
Up: 292.00
ifconfig:
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
options=1203<RXCSUM,TXCSUM,TXSTATUS,SW_TIMESTAMP>
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
nd6 options=201<PERFORMNUD,DAD>
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=50b<RXCSUM,TXCSUM,VLAN_HWTAGGING,AV,CHANNEL_IO>
ether 78:7b:8a:b1:df:46
inet6 fe80::1008:cfe4:c747:3b0f%en0 prefixlen 64 secured scopeid 0x4
inet 192.168.1.91 netmask 0xffffff00 broadcast 192.168.1.255
inet6 2a02:6b62:20a1:0:145b:ee86:7523:ee50 prefixlen 64 autoconf secured
inet6 2a02:6b62:20a1:0:1c7f:9b2:2236:5741 prefixlen 64 autoconf temporary
nd6 options=201<PERFORMNUD,DAD>
media: autoselect (1000baseT <full-duplex,flow-control>)
status: active
en1: flags=8823<UP,BROADCAST,SMART,SIMPLEX,MULTICAST> mtu 1500
options=400<CHANNEL_IO>
ether 98:9e:63:44:8f:22
nd6 options=201<PERFORMNUD,DAD>
media: autoselect (<unknown type>)
status: inactive
en2: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
options=460<TSO4,TSO6,CHANNEL_IO>
ether 82:22:05:43:38:00
media: autoselect <full-duplex>
status: inactive
en3: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
options=460<TSO4,TSO6,CHANNEL_IO>
ether 82:22:05:43:38:01
media: autoselect <full-duplex>
status: inactive
bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=63<RXCSUM,TXCSUM,TSO4,TSO6>
ether 82:22:05:43:38:00
Configuration:
id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
ipfilter disabled flags 0x0
member: en2 flags=3<LEARNING,DISCOVER>
ifmaxaddr 0 port 7 priority 0 path cost 0
member: en3 flags=3<LEARNING,DISCOVER>
ifmaxaddr 0 port 8 priority 0 path cost 0
nd6 options=201<PERFORMNUD,DAD>
media: <unknown type>
status: inactive
p2p0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 2304
options=400<CHANNEL_IO>
ether 0a:9e:63:44:8f:22
media: autoselect
status: inactive
awdl0: flags=8902<BROADCAST,PROMISC,SIMPLEX,MULTICAST> mtu 1484
options=400<CHANNEL_IO>
ether 8a:a4:3a:2c:41:3c
nd6 options=201<PERFORMNUD,DAD>
media: autoselect
status: inactive
llw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=400<CHANNEL_IO>
ether 8a:a4:3a:2c:41:3c
nd6 options=201<PERFORMNUD,DAD>
utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
inet6 fe80::6370:2f97:ec48:6195%utun0 prefixlen 64 scopeid 0xd
nd6 options=201<PERFORMNUD,DAD>
utun1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 2000
inet6 fe80::22d6:74ad:8ce5:4348%utun1 prefixlen 64 scopeid 0xe
nd6 options=201<PERFORMNUD,DAD>
Edited by MysticLady (Fri 05-Nov-21 13:10:45)
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Getting somewhere now.
Network interface on the iMac now connecting at 1000baseT so full speed. However connection should be bouncing off your 500 up/down limits, so something is still not happy.
Can you reboot the Linksys router and also the iMac and retest.
Are you running any anti-virus or malware protection software on the iMac? Can you retest speedtest on the iMac with no other apps running?
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Looking better, you now have a gigabit ethernet connection
...media: autoselect (1000baseT <full-duplex,flow-control>)
The previous cable was probably just 2 twisted pairs which only works up to 100Mbps or it was faulty.
Speed test still looks a bit low, there must be some other reason for that.
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Mac rebooted.
Down: 445
Up: 506
Will re-boot the Linksys router when the other half has finished her zoom call. 
How can I get the same speeds via WiFi?
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Interesting. Different cable attached.
Ping: 2 ms
Down: 377.00
Up: 181.97
and then again:
Down: 436.27
Up: 292.00
Missed your updated second speedtest result. That’s much healthier. Almost ‘normal’.
Can you rinse and repeat as noted above, following reboot of both router and iMac
Now test to the Community Fibre server under speedtest using wired connection on the iMac and also do the same test to the same server using your iPhone and post the results.
I suspect if the results don’t improve much on the iMac then you have either software or MacOS issues which may be throttling the speeds.
You could also try a WiFi connection from the iMac - just make sure there’s no chance of interference with your previous WiFi. I’d use a fresh SSID setup to test.
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Mac rebooted.
Down: 445
Up: 506
Will re-boot the Linksys router when the other half has finished her zoom call.
How can I get the same speeds via WiFi?
I suspect the zoom call might be eating some bandwidth and probably some CPU cycles from the router, so it may not reach the full capacity of the pipe unless your the only one on the connection (whilst your testing).
You can reorder the network connection preferences on the iMac to prioritise WIFi over the wired connection - however for the sake of simplicity just disconnect the wired network connection.
I don’t have a Velop router, but in general you need to connect to an SSID that using the 5 GHz band on WiFi. The router and iMac will negotiate the best connection speed - you should be able to achieve near enough 500 Mbps in both directions using your 802.11AC based network adapter that’s in the iMac.
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Router now re-booted, no change ion speeds via ethernet direct connection.
Logging in to the Linksys router settings I see:
2.4 GHz band - Security mode = WPA2 Personal - WiFi Mode = Mixed
5 GHz band - Security mode = WPA2 Personal - WiFi Mode = Mixed
I'm not sure what would be the best thing to change, or how?
I'd prefer to connect via WiFi and get those same faster speeds.
New test via WiFi:
Down: 173.40
Up: 74.90
Edited by MysticLady (Fri 05-Nov-21 13:49:18)
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Post deleted by candlerb
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WiFi speeds can be impacted by so many variables.
Something as simple as living in an urban area with lots of close neighbours sharing the same WiFi channel can have considerable impact on wireless throughput/speed.
You have ruled out community fibre being the issue with the wired speed test.
Does your Linksys router allow you to name the 2.4GHz and 5GHz band separately? That way you can select which of the 2 you wish to use rather than the router deciding which is best.
You won't be able to get full speeds on the 2.4GHz band.
Edited by j0hn83 (Fri 05-Nov-21 13:56:15)
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I have no idea about naming each band, or how to select which I am connected to. Anyone know how?
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First, see which band you're connected to: option-click the wifi signal strength icon in the menu bar, and the details will be in grey under the network you're connected to.
Look for a line like this:
Channel: 36 (5 GHz, 80 MHz)
and tell us what you see.
The "5 GHz" is what you're looking for here; if it says "2.4 GHz" then we'll need to drill down to find out why your Mac chose that band.
The "80 MHz" is also important, as it's the channel width. If it says "160 MHz" then so much the better. However if it says "20 MHz" or "40 MHz" then these are narrow channels, which won't support the full available speed.
Again, given that info, it will be possible to suggest how to change your router's configuration to use one of the wide channels - that may be a setting like "Channel Width", "VHT 80". But let's first find the problem before looking at how to fix it
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I managed to rename the 2.4Ghz channel, so I now know I am connected to the 5 Ghz. Speeds via WiFi are still slow, so for the moment I'm back on ethernet.
Would love to get WiFi speeds fixed.
Edited by MysticLady (Fri 05-Nov-21 15:02:01)
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First, see which band you're connected to: option-click the wifi signal strength icon in the menu bar, and the details will be in grey under the network you're connected to.
Look for a line like this:
Channel: 36 (5 GHz, 80 MHz)
and tell us what you see.
Other things we'd like to see:
RSSI
Noise
Tx Rate
PHY Mode
These may indicate if the problem is with a broken antenna inside either your Mac or your router (given that they're right next to each other)
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https://www.linksys.com/us/support-article?articleNu...
That walk through shows you how to change the ssid name ..
so you could do
MysticLady2-4ghz
and
MysticLady5ghz
that way you can choose which frequency to connect to
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I think the router settings are generally fine, given that an iPhone can max the broadband throughput on speedtests.
But let’s see what the diagnostic from the iMac say…
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I think the router settings are generally fine, given that an iPhone can max the broadband throughput on speedtests.
But let’s see what the diagnostic from the iMac say…
yeah it is the imac, the question is; is it hardware or the os, and Big sur has had its fair share of wifi issues
@mysticLady can you try wifi via safe mode and see if the issue occurs again?
Edited by Taras (Fri 05-Nov-21 16:03:13)
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I have just run Apple's network diagnostics tool and I now have a folder with a huge amount of files. I'm hoping somebody can help me work out what I now need to do
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Can you also try safe mode as well. Third party software can cause issues too .
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I already tried that. Also tried signing into a guest account. No speed difference.
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ahh ok, so in theory we can discount 3rd party software.
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Here's a sample of one (of around 50+) diagnostic files.
Conflicting Wi-Fi CC 0.001 Yes 16:26:19.452 Found conflicting country code(s) (gb)
'SKYVF8RT_2GEXT' — 44:a5:6e:93:bd:24 (FR)
Congested Wi-Fi Channel 0.005 Yes 16:26:19.441 Current channel (112) is congested (CCA = n/a)
Recommended 2.4GHz — 11
Recommended 5GHz — 161
Large PNL 0.002 Yes 16:26:19.425 Wi-Fi PNL count (14)
Uncommon DTIM Interval 0.001 Yes 16:26:19.407 DTIM interval is 0ms
Poor Wi-Fi Signal 0.001 Yes 16:26:19.404 Current network has poor signal (RSSI=-71dBm, SNR=21dB)
BT Connected Count 0.000 Yes 16:26:19.402 Connected Bluetooth device count (2)
BT Paired Count 0.044 Yes 16:26:19.357 Paired Bluetooth device count (3)
Custom Web Proxy 0.001 Yes 16:26:19.356 Detected custom web proxy settings
Custom IPv6 0.001 Yes 16:26:19.354 Wi-Fi is using 'Link Local' for IPv6
Primary IPv6 is Wi-Fi 0.002 No 16:26:19.350 None
IPv6 Assigned 0.001 No 16:26:19.346 Wi-Fi does not have IPv6 assigned
Ping6 AWDL 0.001 No 16:26:11.424 Could not ping AWDL ((null) / 0.00ms / BE / 64 bytes / w=0.000000s / c=0)
Ping WAN 1.006 No 16:26:08.322 Could not ping DNS server (17.254.0.22 / 0.00ms / BE / 68 bytes / i=0.100000s / W=1.600000s / t=1.600000s / c=1)
Curl Apple 0.508 Yes 16:25:36.388 Could curl 'https://captive.apple.com'
Reach Apple 2.567 Yes 16:25:36.388 Could reach 'www.apple.com'
Ping6 AWDL 2.567 No 16:25:36.388 Could not ping AWDL ((null) / 0.00ms / BE / 64 bytes / w=0.000000s / c=0)
Resolve DNS 2.568 Yes 16:25:36.388 Could resolve 'captive.apple.com'
Ping WAN 3.587 No 16:25:36.388 Could not ping DNS server (17.254.0.22 / 0.00ms / BE / 68 bytes / i=0.100000s / W=1.600000s / t=1.600000s / c=1)
Ping WAN 3.893 Yes 16:25:36.388 Could ping DNS server (192.168.1.1 / 3.17ms / BE / 69 bytes / i=0.100000s / W=1.600000s / t=1.600000s / c=1)
Ping LAN 3.902 Yes 16:25:36.388 Could ping router (192.168.1.1 / 7.89ms / VI / 66 bytes / i=0.100000s / W=1.600000s t=1.600000s / c=1)
Ping LAN 3.902 Yes 16:25:36.388 Could ping router (192.168.1.1 / 8.08ms / VO / 67 bytes / i=0.100000s / W=1.600000s t=1.600000s / c=1)
Ping LAN 3.902 Yes 16:25:36.388 Could ping router (192.168.1.1 / 7.22ms / BK / 65 bytes / i=0.100000s / W=1.600000s t=1.600000s / c=1)
Ping LAN 3.902 Yes 16:25:36.388 Could ping router (192.168.1.1 / 6.93ms / BE / 64 bytes / i=0.100000s / W=1.600000s t=1.600000s / c=1)
Ping LAN 4.398 Yes 16:25:36.388 Could ping router (192.168.1.1 / 2.00ms / VO / 73 bytes / i=0.100000s / W=0.200000s t=1.600000s / c=6)
Ping LAN 4.399 Yes 16:25:36.388 Could ping router (192.168.1.1 / 2.03ms / BK / 71 bytes / i=0.100000s / W=0.200000s t=1.600000s / c=6)
Ping LAN 4.399 Yes 16:25:36.388 Could ping router (192.168.1.1 / 2.02ms / BE / 70 bytes / i=0.100000s / W=0.200000s t=1.600000s / c=6)
Ping LAN 4.466 Yes 16:25:36.388 Could ping router (192.168.1.1 / 1.47ms / VI / 72 bytes / i=0.100000s / W=0.200000s t=1.600000s / c=6)
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2 lines worth looking at
Poor Wi-Fi Signal 0.001 Yes 16:26:19.404 Current network has poor signal (RSSI=-71dBm, SNR=21dB)
Congested Wi-Fi Channel 0.005 Yes 16:26:19.441 Current channel (112) is congested (CCA = n/a)
So you need to access your router and change the wifi channels being used to
Recommended 2.4GHz — 11
Recommended 5GHz — 161
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Here's a sample of one (of around 50+) diagnostic files.
Ping WAN 1.006 No 16:26:08.322 Could not ping DNS server (17.254.0.22 / 0.00ms / BE / 68 bytes / i=0.100000s / W=1.600000s / t=1.600000s / c=1)
Apple heads
Any reason why it needs to use apple dns servers...
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I would suspect it's just doing some sort of diagnostic *test* against Apple DNS servers. Anyway that won't affect wifi throughput.
Still waiting for the results of option-click on the wifi. On my machine for example, I get:
Channel: 36 (5 GHz, 80 MHz)
RSSI: -55 dBm
Noise: -92 dBm
Tx Rate: 434 Mbps
PHY Mode: 802.11ac
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Here are the other files in the diagnostics report:
sw_vers.txt
3bars.txt
additional.log
arp.txt
awdl_status.txt
bluetooth_status.txt
BluetoothPacketLog.pklg
bonjour_records.txt
com.apple.airport.preferences.plist
com.apple.Bluetooth.plist
com.apple.network.eapolclient.configuration.plist
com.apple.wifi.known-networks.plist
com.apple.wifi.recent-networks.json
com.apple.wifi.syncable-networks.legacy.plist
com.apple.wifi.syncable-networks.plist
CommunityFibre10Gb_7DC47-diagnostics.txt
configd-store.plist
CoreCapture
debug-log.txt
diagnostics-configuration.txt
diagnostics-connectivity.txt
diagnostics-environment.txt
easyperf_airportd.txt
easyperf_WiFiAgent.txt
en1_tcpdump.pcap
event_history.txt
footprint_airportd.txt
footprint_WiFiAgent.txt
heap_airportd.txt
heap_WiFiAgent.txt
ifconfig.txt
jetsam_priority.txt
leaky_ap_stats.txt
ndp.txt
netstat-POST.txt
netstat-PRE.txt
network_status.txt
ping.txt
security.txt
sysdiagnose_2021.11.05_16-27-23+0000_macOS_iMac18-3_20G224.tar.gz
system_profiler.spx
traceroute.txt
vmmap_airportd.txt
vmmap_WiFiAgent.txt
wifi_datapath-POST.txt
wifi_datapath-PRE.txt
wifi_scan.txt
wifi_status.txt
wifi-11-05-2021__16/25/34.562.log.tgz
wifi-11-05-2021__16/25/35.994.log.tgz
wifi-11-05-2021__16/25/40.268.log.tgz
wifi-11-05-2021__16/25/48.064.log.tgz
wifi-11-05-2021__16/26/22.330.log.tgz
wifi-11-05-2021__16/26/25.143.log.tgz
wifi.log.0.bz2
wifi.log.tgz
wifivelocity_logarchive.log.tgz
WirelessRadioManager.log.tgz
zprint.txt
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Can I just clarify a few things?
1. Did you still have the previous BT WiFi router running - if so could you please switch that off (at least temporarily)?
2. Can you download the Ookla speedtest app on your iPhone and conduct a speedtest to the Community Fibre servers in the list of servers - as I wasn't sure if the figures you quoted earlier were from another app just doing a 'local' network test.
3. Screenshoot the output of what Candlerb has been asking for (Option/Alt key + mouse click on the WiFi Icon in the menu bar) - as that easily tells us what the iMac is connected to and health of connection etc.
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1. Old BT router has been unplugged.
2. Speed test on iPhone 7 to CF server:
Down: 121 Mbps
Up: 49.7 Mbps
3. How do I attach a screenshot to my post?
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WiFi info:
Channel: DFS, 112 (5 GHz, 80 MHz)
RSSI: -71 dBm
Noise: -92 dBM
Tx Rate: 59 Mbps
PHY Mode: 802.11ac
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1. Old BT router has been unplugged.
2. Speed test on iPhone 7 to CF server:
Down: 121 Mbps
Up: 49.7 Mbps
WiFi info:
Channel: DFS, 112 (5 GHz, 80 MHz)
RSSI: -71 dBm
Noise: -92 dBM
Tx Rate: 59 Mbps
PHY Mode: 802.11ac
OK thanks for that. I had previously (incorectly!) presumed that the iPhone was getting a much better actual throughput. It's not really getting anywhere close to what it should be capable of, and obviously neither is the iMac.
The signal strength (RSSI) reported by the iMac is particularly weak, especially given that you say its quite close. I would expect that signal strength should in those circumstance be better than -50 dBm (a weaker signal strength is indicated by a more negative number...stronger is approaching zero).
My thoughts are turning to the router actually,....
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3. How do I attach a screenshot to my post?
You can use an image hosting website like for example:
https://imgbb.com
https://postimages.org
Then post the resulting link in your reply here
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Hopefully the instruction to post up the WiFi stats from the iMac made sense.
Thinking of next steps: If you have time over the weekend, I would do a factory-reset of the router and set it up from scratch.
Beyond that check/update the firmware on the router and if that fails ask CF to replace the router.
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Do not know which router number you have or whether you have pods as well.
The beam forming option is more suited to mobile devices. If yours are mainly static machines. it may be better to turn this option off, if available.. Giving 2 x 5g and 1 x 2.4g networks which can be named separately. Or just turn off 2.4g to give separate 5g and 2.4g networks.
The networks can be accessed from wifi settings and advanced option to find optimal wifi channel.
Attached are documents that seem to relate to Linksys Triband Routers.
The other option is, if you do not need beamforming ask community to supply replacement already set up with this off.
I found with different make of triband I had to disable beamforming for best performance.
It all depends on what items you want to connect to router..
https://www.linksys.com/gb/support-article?articleNu...
https://downloads.linksys.com/downloads/userguide/MR...
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Did you mean Beam Forming or Band Steering? Your first link refers to Band Steering rather than Beam Forming ands the second link is for a different model of router to the OP (Linksys Velop)?
The OP has setup and is testing using a dedicated 5 GHz band SSID. So band steering doesn't really apply....
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Depends on the wifi link speed, your mac's wifi card maybe outdated or is running the 2.4Ghz Link
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Depends on the wifi link speed, your mac's wifi card maybe outdated or is running the 2.4Ghz Link
Its not any of those.
Its either the router or big sur or hardware failure on the imac.. @Pheasant is doing a good job atm, trying to so sort this slight weird issue out
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Depends on the wifi link speed, your mac's wifi card maybe outdated or is running the 2.4Ghz Link
Yes still waiting for some some diagnostic info from the OP. At the moment we know that some of the Mac diagnostics indicate an RSSI of -71dBm and an SNR of 21dB.
If the Velop box is in the same room (without obstructions or walls in the way) then I would expect the RSSI to be better than -50 and the SNR to be high thirties and forties. Indeed that is the only way she will get better transfer rates as re higher modulation and coding rates are only available when the physical radio link is in rude health.
We know that her 2017 iMac has an 802.11ac spec WiFi card with 3x3 mimo. So under good conditions it ought to easily connect and transfer at a much higher rate. Ditto the iPhone 7.
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This looks like the router I have: Linksys Velop Whole Home Intelligent Mesh WiFi System, Tri-Band, 1-pack
I'm not sure what the "beam forming" option is or what it does?
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When I spoke to Linksys tech, they couldn't offer me support because they said the router has been loaded with Community Fibre's own firmware. If I do a factory reset, will it still use the Community Fibre firmware?
I just checked the router via the IP address weblink and the firmware is up to date.
I'm also not sure I'm technical enough to set it up from scratch. There are a lot of settings in there I just don't understand.
Any other suggestions? Clearly there is something not right with the router's WiFi output.
Once again, I'd like to thank everybody for their friendly help and technical knowledge
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A quick update. I just did a reset by holding the router reset button for 20 seconds, and the WiFi is now pretty much up to what it should be, when holding my iPhone near the router and running a speedtest.net.
But in the next room, just a few feet away, the speed is beyond poor. Could a wall of old VHS videotapes between the router be affecting my WiFi reception?
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Good I was hoping a full reset would do the trick.
Yes walls or other obstructions have a massive impact on WiFi throughput. Easily halve or quarter the throughput. It’s just the way it is. That’s why we have multiple access point systems.
Good luck with the new service.
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Do you think adding an extension "node" would help?
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Yes, but to a point, using mesh type backhaul between the node and the router. That is without a cable linking the node and router, then the connection just uses WiFi between the node and router. If conditions still aren’t ideal (due to surroundings / environment etc) then you will still be held back on internet throughout, even though you may have excellent connection to the node from your device.
Does that make sense? It’s worth a shot, but may not be the magic bullet you’re seeking. You may need to experiment with positioning of the devices to get the best overall connection quality. It works for folks as long as there is a reasonably strong connection between the various nodes and the base router. The trouble is, as you’ve found there are so many variables that can affect performance of WiFi.
Ultimately the best, most reliable connection will always be a cable.
Edited by Pheasant (Sat 06-Nov-21 10:43:43)
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Thanks for the tip. I guess it will have to remain an ethernet connection. I just need to drill a hole through the wall now
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Changing wifi channel may help but at 5 ghz it would be much of muchness. If you are unhappy of drilling holes in the wall, a good powerline pair of unit may help as alternative bridge. But that depends on the wiring in your house .. Ultimately a mess with a cat5e or greater backhaul will be better.
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My new dilemma - I now have the one ethernet cable from the router to my office which has three computers (two of which are old and do not have WiFi).
What is the best way to connect them to the one ethernet cable? Can I keep the main speed for the one main work Mac and split the signal for the other two?
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Just get a small 4 or 5 port Gigabit switch.
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My new dilemma - I now have the one ethernet cable from the router to my office which has three computers (two of which are old and do not have WiFi).
What is the best way to connect them to the one ethernet cable? Can I keep the main speed for the one main work Mac and split the signal for the other two?
As Pheasant said get a 5 or 8 port gigabit switch, if you can upgrade the cable to 6a (not needed but worth doing in the long run).
You may find that the netgear wifi unit may work better in there. If you do decided got a 2nd mesh unit i think the office may be a good idea to put the 2nd mesh unit .
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My new dilemma - I now have the one ethernet cable from the router to my office which has three computers (two of which are old and do not have WiFi).
What is the best way to connect them to the one ethernet cable? Can I keep the main speed for the one main work Mac and split the signal for the other two?
Might also want to consider connecting the “through wall” network cable directly to the Huawei ONT copper port.
Move the Velop unit into the office for the best WiFi (if that’s the primary WiFi usage area) and then hang the little gigabit Ethernet switch off the Ethernet port on the Velop for the other wired computers.
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Sorry Taras I just re-read your post, I think I’m repeating your suggestion somewhat.
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Could you not connect the ethernet cable to the ONT, then the router to ethernet cable in the office ?
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i think all 3 of us have said the same thing of sorts.. The bigger thing as we don't know the cable length is to make sure the cat cable to the office is of good quality.
For me, backbone cabling - spend the money and for patch cabling in most cases you get away with 5e!
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Cat5e everywhere. It's cheaper, more flexible, easier to terminate correctly than Cat6/Cat6A. YAGNI.
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true about decent 6a cable ....... IT DOESN'T BEND (not that you should bend cable but i think you know what i mean)!
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