Cool Ideas Fibre ISP – Feedback Thread 4

[PBCool]

@PBCool I finally got connected with fibre a few days ago (Octotel, CISP on a 100mb line).

As a new user of fibre, is it normal for my stats to look like this? I see high packet loss overall, including on my router as well. I'm using an ASUS AC52U router.

Let me know how best to test these things? I am running a CAT5e cable to my PC, if that counts for anything.

Thanks

View attachment 1140956

View attachment 1140958

So loss on a single hop that doesn't compound on a route doesn't really matter. IE router 1 in this case is dropping 55% of packets, the next hop 5 or 6% and that carries through to the destination.
This tells us the relative loss occurs from hop 2 to 3, which is once again the FNO and octotel.

 

[image132]

Thanks for the reply!

Does this first hop refer to the hop between my router and PC? Or between the fibre box and router? Could it be my router?

I just tried changing both of these cable links (all CAT5e) but the packet loss was just as bad. I put the cables as before and first hop seems even worse?

View attachment 1141000

Are you running malwarebytes?

 

[grantduke]

@PBCool Noticed on traceroute that two hops keep on changing their IP addresses. I guess this is some load balancing you guys do?

100.98.0.1
100.98.0.2
100.98.0.3

and

100.98.0.49
100.91.1.141

Hope 3 and 4



Have noticed that the ping will spike quite high when the change happens - sub 160ms for super short brief of time

 

[PBCool]

@PBCool Noticed on traceroute that two hops keep on changing their IP addresses. I guess this is some load balancing you guys do?

100.98.0.1
100.98.0.2
100.98.0.3

and

100.98.0.49
100.91.1.141

Hope 3 and 4

View attachment 1141244

Have noticed that the ping will spike quite high when the change happens - sub 160ms for super short brief of time

Yeah it's typically ecmp routed, can you post an example of a ping spike?

 

[grantduke]

Yeah it's typically ecmp routed, can you post an example of a ping spike?

Note: I am on wireless. But not seeing any ping spikes over the wifi connection to AP.



Update: Tiny bit of packetloss. Seems to be a thing with Frogfoot

 

[PBCool]

Note: I am on wireless. But not seeing any ping spikes over the wifi connection to AP.

View attachment 1141274

Update: Tiny bit of packetloss. Seems to be a thing with Frogfoot

View attachment 1141276

Thanks that loss is either on the Google network or the host just dropping a bit of icmp. I don't see any spikes of sub 160ms though?

 

[AfricanTech]

Something odd going on this morning - picking up intermittent drops to international sites (various and seems to resolve itself if you hit refresh a couple of times)

Frogfoot 100/100 trenched
Pinelands, Cape Town

DNS:
208.67.222.222
208.67.222.220

 

[PBCool]

Something odd going on this morning - picking up intermittent drops to international sites (various and seems to resolve itself if you hit refresh a couple of times)

Frogfoot 100/100 trenched
Pinelands, Cape Town

DNS:
208.67.222.222
208.67.222.220

Can you try run some MTRs? Is your session dropping?

 

[AfricanTech]

Can you try run some MTRs? Is your session dropping?

The session isn't dropping - just getting "site unreachable" to various sites (eg MyBB, Accuweather, Roblox, AppleStore)

I've removed the Cisco DNS route and will monitor

 

[AfricanTech]

Can you try run some MTRs? Is your session dropping?

Here is a run to coolideas.co.za

|------------------------------------------------------------------------------------------|
|                                      WinMTR statistics                                   |
|                       Host              -   %  | Sent | Recv | Best | Avrg | Wrst | Last |
|------------------------------------------------|------|------|------|------|------|------|
|                                  router -    0 |  269 |  269 |    0 |    0 |   28 |    0 |
|                             154.0.0.245 -    0 |  269 |  269 |    1 |    2 |   37 |    1 |
|                              100.98.0.3 -    0 |  269 |  269 |    1 |    1 |   38 |    1 |
|                             100.98.0.49 -    0 |  269 |  269 |   16 |   18 |  172 |   18 |
|                            100.99.0.212 -    1 |  265 |  264 |   16 |   18 |   48 |   18 |
|                            100.99.3.244 -    0 |  269 |  269 |   16 |   17 |   44 |   17 |
|                              154.0.6.72 -    0 |  269 |  269 |   16 |   18 |  172 |   18 |
|________________________________________________|______|______|______|______|______|______|
   WinMTR v0.92 GPL V2 by Appnor MSP - Fully Managed Hosting & Cloud Provider

 

[AfricanTech]

For example, can't get to https://whatip.gabmus.org/

then tried again a minute later and it goes through but slowly....

Rebooting ONT and router now....

 

[PBCool]

For example, can't get to https://whatip.gabmus.org/

then tried again a minute later and it goes through but slowly....

Rebooting ONT and router now....

Sounds more like MTU, which router are you using?

 

[AfricanTech]

Sounds more like MTU, which router are you using?

Mikrotik RB2011UiAS

Max MTU: 1480

Unchanged since forever

Edit: Changed to 1452 - let's see what happens

Edit: When I changed to this seemed to work then.....see below

 

[AfricanTech]

Eish, something isn't lekker.

I set the new MTU size using the ping test method - when I test at a lower value (eg 1424, ping test shows no fragmentation; so I set it in the router, test again and blergh - the ping test at the new value fails......(fragmented but DF value set)

Scratching my head here - have set it back to 1480 for the time being

 

[Tinuva]

Eish, something isn't lekker.

I set the new MTU size using the ping test method - when I test at a lower value (eg 1424, ping test shows no fragmentation; so I set it in the router, test again and blergh - the ping test at the new value fails......(fragmented but DF value set)

Scratching my head here - have set it back to 1480 for the time being

If router mtu is 1452 don't expect to send u fragmented ping of 1452,it will have to be smaller to leave space for packet header etc

 

[AfricanTech]

If router mtu is 1452 don't expect to send u fragmented ping of 1452,it will have to be smaller to leave space for packet header etc

Thanks. Forgot about the overhead. What's the best way to determine what MTU to set on the router then?

 

[Tinuva]

Thanks. Forgot about the overhead. What's the best way to determine what MTU to set on the router then?

Follow https://kb.netgear.com/19863/Ping-Test-to-determine-Optimal-MTU-Size-on-Router

Basically, if you set mtu to x, test ping with x - 28

 

[powermzii]

Thanks. Forgot about the overhead. What's the best way to determine what MTU to set on the router then?

Try this

MTU test - LetMeCheck.it

Online MTU test allows you to test the maximum MTU size from our host to your destination.

www.letmecheck.it

 

[AfricanTech]

Try this

MTU test - LetMeCheck.it

Online MTU test allows you to test the maximum MTU size from our host to your destination.

www.letmecheck.it

Thanks - used link - basically confirmed that 1480 is fine

The maximum MTU size for <my.public.ip> is: 1480​

@PBCool , it's not an MTU issue and I'm still experiencing issues

 

[powermzii]

Thanks - used link - basically confirmed that 1480 is fine

The maximum MTU size for is: 1480​

@PBCool , it's not an MTU issue and I'm still experiencing issues

Sometimes the lower values have better performance / stability