Just now on a box I manage I'm seeing weird ping times on a DSL (home) connection. It's wreaking havoc with things.
Has anyone seen a pattern like this before?
on the dsl box out to another IP: : icmp_seq=1 ttl=56 time=3073 ms : icmp_seq=2 ttl=56 time=2112 ms : icmp_seq=3 ttl=56 time=1154 ms : icmp_seq=4 ttl=56 time=192 ms : icmp_seq=5 ttl=56 time=3578 ms : icmp_seq=6 ttl=56 time=2616 ms : icmp_seq=7 ttl=56 time=1658 ms : icmp_seq=8 ttl=56 time=694 ms : icmp_seq=9 ttl=56 time=4125 ms : icmp_seq=10 ttl=56 time=3170 ms : icmp_seq=11 ttl=56 time=2202 ms : icmp_seq=12 ttl=56 time=1240 ms : icmp_seq=13 ttl=56 time=289 ms
It's bursty, the above is 3 bursts, where I start the ping, wait 3s and it spits out 4 replies together, then again... sometimes the time is up to 10kms.
If I ping from my box to that box I get even more weirdness:
icmp_seq=1 ttl=57 time=60.8 ms icmp_seq=2 ttl=57 time=60.0 ms icmp_seq=3 ttl=57 time=61.4 ms icmp_seq=4 ttl=57 time=70.4 ms icmp_seq=1 ttl=57 time=3612 ms (DUP!) icmp_seq=2 ttl=57 time=2649 ms (DUP!) icmp_seq=3 ttl=57 time=1692 ms (DUP!) icmp_seq=4 ttl=57 time=726 ms (DUP!) icmp_seq=5 ttl=57 time=63.4 ms icmp_seq=6 ttl=57 time=59.3 ms icmp_seq=7 ttl=57 time=62.4 ms icmp_seq=8 ttl=57 time=68.3 ms icmp_seq=9 ttl=57 time=61.4 ms icmp_seq=5 ttl=57 time=4366 ms (DUP!) icmp_seq=6 ttl=57 time=3403 ms (DUP!) icmp_seq=7 ttl=57 time=2443 ms (DUP!) icmp_seq=8 ttl=57 time=1488 ms (DUP!) icmp_seq=9 ttl=57 time=518 ms (DUP!)
I don't think I've ever seen DSL behave that strangely...
I don't think I've ever seen DSL behave that strangely...
Neither have I. I suspect your problem is much closer to home than MTS DSL. So, what "innocent, funny things" have you done lately? Like, the kind of things that "obviously" can't cause this problem. :)
Hartmut W Sager - Tel +1-204-339-8331
On 21 January 2017 at 19:09, Trevor Cordes trevor@tecnopolis.ca wrote:
Just now on a box I manage I'm seeing weird ping times on a DSL (home) connection. It's wreaking havoc with things.
Has anyone seen a pattern like this before?
on the dsl box out to another IP: : icmp_seq=1 ttl=56 time=3073 ms : icmp_seq=2 ttl=56 time=2112 ms : icmp_seq=3 ttl=56 time=1154 ms : icmp_seq=4 ttl=56 time=192 ms : icmp_seq=5 ttl=56 time=3578 ms : icmp_seq=6 ttl=56 time=2616 ms : icmp_seq=7 ttl=56 time=1658 ms : icmp_seq=8 ttl=56 time=694 ms : icmp_seq=9 ttl=56 time=4125 ms : icmp_seq=10 ttl=56 time=3170 ms : icmp_seq=11 ttl=56 time=2202 ms : icmp_seq=12 ttl=56 time=1240 ms : icmp_seq=13 ttl=56 time=289 ms
It's bursty, the above is 3 bursts, where I start the ping, wait 3s and it spits out 4 replies together, then again... sometimes the time is up to 10kms.
If I ping from my box to that box I get even more weirdness:
icmp_seq=1 ttl=57 time=60.8 ms icmp_seq=2 ttl=57 time=60.0 ms icmp_seq=3 ttl=57 time=61.4 ms icmp_seq=4 ttl=57 time=70.4 ms icmp_seq=1 ttl=57 time=3612 ms (DUP!) icmp_seq=2 ttl=57 time=2649 ms (DUP!) icmp_seq=3 ttl=57 time=1692 ms (DUP!) icmp_seq=4 ttl=57 time=726 ms (DUP!) icmp_seq=5 ttl=57 time=63.4 ms icmp_seq=6 ttl=57 time=59.3 ms icmp_seq=7 ttl=57 time=62.4 ms icmp_seq=8 ttl=57 time=68.3 ms icmp_seq=9 ttl=57 time=61.4 ms icmp_seq=5 ttl=57 time=4366 ms (DUP!) icmp_seq=6 ttl=57 time=3403 ms (DUP!) icmp_seq=7 ttl=57 time=2443 ms (DUP!) icmp_seq=8 ttl=57 time=1488 ms (DUP!) icmp_seq=9 ttl=57 time=518 ms (DUP!)
I don't think I've ever seen DSL behave that strangely... _______________________________________________ Roundtable mailing list Roundtable@muug.ca https://muug.ca/mailman/listinfo/roundtable
On 2017-01-21 Hartmut W Sager wrote:
I don't think I've ever seen DSL behave that strangely...
Neither have I. I suspect your problem is much closer to home than MTS DSL. So, what "innocent, funny things" have you done lately? Like, the kind of things that "obviously" can't cause this problem. :)
Solved it, I think. Yup, you were right. I think it was a confluence of things: 1. The box was experiencing massively higher than usual outgoing traffic. 2. I use QoS on egress to allow fair bw use to many different protocols. I checked and the total rate allowed was set quite low, because that's what their DSL modem used to allow, but they recently got a new modem/plan and I ran a test and they now get 10X the *upload* speed. So I got to bump up all the QoS speeds.
Now the problem is gone. I think the QoS stuff might go completely mental when faced with insane demands.
Looking at the pings where they bunch up, it now is clear that the QoS was filling up the bucket then allowing a burst through, filling again, etc.
The worst part of it all (and why I noticed the problem) is that DNS wasn't resolving... timeouts. I never thought to put DNS UDP 53 in its own QoS class with dedicated bw, but I'm going to implement this now!
On 2017-01-22 Dan Keizer wrote:
i have seen that type of issue with mts at a fellow ham place when he was operating the low bands on hf it would cut out his mts internet off and on ... any BIG antennas around there?
That actually could still be a factor! We'll see if the problem recurs. This office is located in a dense industrial park with all sorts of weird stuff around.
Would your buddy's DSL "cut off" as in "hang up" (and re-PPPoE connect), or just drop packets?
Thank to MUUGers once again!
i have seen that type of issue with mts at a fellow ham place when he was operating the low bands on hf it would cut out his mts internet off and on ... any BIG antennas around there?
On Sat, Jan 21, 2017, 19:19 Trevor Cordes trevor@tecnopolis.ca wrote:
Just now on a box I manage I'm seeing weird ping times on a DSL (home) connection. It's wreaking havoc with things.
Has anyone seen a pattern like this before?
on the dsl box out to another IP: : icmp_seq=1 ttl=56 time=3073 ms : icmp_seq=2 ttl=56 time=2112 ms : icmp_seq=3 ttl=56 time=1154 ms : icmp_seq=4 ttl=56 time=192 ms : icmp_seq=5 ttl=56 time=3578 ms : icmp_seq=6 ttl=56 time=2616 ms : icmp_seq=7 ttl=56 time=1658 ms : icmp_seq=8 ttl=56 time=694 ms : icmp_seq=9 ttl=56 time=4125 ms : icmp_seq=10 ttl=56 time=3170 ms : icmp_seq=11 ttl=56 time=2202 ms : icmp_seq=12 ttl=56 time=1240 ms : icmp_seq=13 ttl=56 time=289 ms
It's bursty, the above is 3 bursts, where I start the ping, wait 3s and it spits out 4 replies together, then again... sometimes the time is up to 10kms.
If I ping from my box to that box I get even more weirdness:
icmp_seq=1 ttl=57 time=60.8 ms icmp_seq=2 ttl=57 time=60.0 ms icmp_seq=3 ttl=57 time=61.4 ms icmp_seq=4 ttl=57 time=70.4 ms icmp_seq=1 ttl=57 time=3612 ms (DUP!) icmp_seq=2 ttl=57 time=2649 ms (DUP!) icmp_seq=3 ttl=57 time=1692 ms (DUP!) icmp_seq=4 ttl=57 time=726 ms (DUP!) icmp_seq=5 ttl=57 time=63.4 ms icmp_seq=6 ttl=57 time=59.3 ms icmp_seq=7 ttl=57 time=62.4 ms icmp_seq=8 ttl=57 time=68.3 ms icmp_seq=9 ttl=57 time=61.4 ms icmp_seq=5 ttl=57 time=4366 ms (DUP!) icmp_seq=6 ttl=57 time=3403 ms (DUP!) icmp_seq=7 ttl=57 time=2443 ms (DUP!) icmp_seq=8 ttl=57 time=1488 ms (DUP!) icmp_seq=9 ttl=57 time=518 ms (DUP!)
I don't think I've ever seen DSL behave that strangely... _______________________________________________ Roundtable mailing list Roundtable@muug.ca https://muug.ca/mailman/listinfo/roundtable
-
Dan Keizer -
Hartmut W Sager -
Trevor Cordes