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Author Topic: Plusnet/Router DNS question  (Read 307 times)

snadge

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Plusnet/Router DNS question
« on: February 10, 2019, 02:39:19 PM »

I've been checking my DNS options and I have DYNAMIC set in my ZyXEL VMG8924-B10A, when I run a DNS Benchmark it reports '192.168.1.1' as being the fastest, when I enter Plusnet's DNS (212.159.13.49 + 212.159.13.50) to be tested alongside it I get differing results, I am wondering if the result for the router is incorrect (min 0ms / max 1ms - whereas all others are circa 12ms). Am I correct in thinking that the router result of 1ms is simply the time it takes for the router to respond rather than actually delivering a DNS query result?

thanks in advance
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Zyxel VMG8924-B10A <-> PlusNET <-> Eci DSLAM
78,500k <-> 6dB <-> FastPath

j0hn

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Re: Plusnet/Router DNS question
« Reply #1 on: February 10, 2019, 03:03:19 PM »

Quote
Am I correct in thinking that the router result of 1ms is simply the time it takes for the router to respond rather than actually delivering a DNS query result?

Yes.

Quote from: 8.8.8.8
PING 8.8.8.8 (8.8.8.8): 56 data bytes
64 bytes from 8.8.8.8: seq=0 ttl=122 time=18.857 ms
64 bytes from 8.8.8.8: seq=1 ttl=122 time=18.602 ms
64 bytes from 8.8.8.8: seq=2 ttl=122 time=18.477 ms
64 bytes from 8.8.8.8: seq=3 ttl=122 time=18.757 ms
64 bytes from 8.8.8.8: seq=4 ttl=122 time=18.639 ms

Quote from: 1.1.1.1
PING 1.1.1.1 (1.1.1.1): 56 data bytes
64 bytes from 1.1.1.1: seq=0 ttl=58 time=17.897 ms
64 bytes from 1.1.1.1: seq=1 ttl=58 time=17.616 ms
64 bytes from 1.1.1.1: seq=2 ttl=58 time=17.467 ms
64 bytes from 1.1.1.1: seq=3 ttl=58 time=17.743 ms
64 bytes from 1.1.1.1: seq=4 ttl=58 time=17.948 ms

Quote from: 9.9.9.9
PING 9.9.9.9 (9.9.9.9): 56 data bytes
64 bytes from 9.9.9.9: seq=0 ttl=56 time=42.608 ms
64 bytes from 9.9.9.9: seq=1 ttl=56 time=41.107 ms
64 bytes from 9.9.9.9: seq=2 ttl=56 time=46.874 ms
64 bytes from 9.9.9.9: seq=3 ttl=56 time=41.637 ms
64 bytes from 9.9.9.9: seq=4 ttl=56 time=41.098 ms

Quote from: Plusnet DNS
PING 212.159.13.49 (212.159.13.49): 56 data bytes
64 bytes from 212.159.13.49: seq=0 ttl=61 time=18.015 ms
64 bytes from 212.159.13.49: seq=1 ttl=61 time=21.859 ms
64 bytes from 212.159.13.49: seq=2 ttl=61 time=56.626 ms
64 bytes from 212.159.13.49: seq=3 ttl=61 time=23.789 ms
64 bytes from 212.159.13.49: seq=4 ttl=61 time=17.646 ms

Quad 9 is useless for me. Always 40ms+
Plusnet DNS is vey inconsistent.

I use 1.1.1.1 with 8.8.8.8 as backup.
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Plusnet FTTC 80/20 -  ECI now Huawei cab
retx low @ 3dB target SNRM
Zyxel VMG1312-B10A bridged with 1508 MTU + Asus RT-AC68U running Asuswrt-Merlin

ejs

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Re: Plusnet/Router DNS question
« Reply #2 on: February 10, 2019, 03:28:49 PM »

Am I correct in thinking that the router result of 1ms is simply the time it takes for the router to respond rather than actually delivering a DNS query result?

I would expect the 1ms to be the time the router takes to deliver a DNS query result that it has got already cached.
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snadge

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Re: Plusnet/Router DNS question
« Reply #3 on: February 10, 2019, 03:54:29 PM »

The cached explanation sounds like what's happening here as it reports other 'normal' results for un-cached etc via Steve Gibsons DNS Benchmark, with that in mind it would be best to leave it on 192.168.1.1 with the DNS server set in the router.

for me Plusnet is the fastest but only just (11ms)

thanks again
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Zyxel VMG8924-B10A <-> PlusNET <-> Eci DSLAM
78,500k <-> 6dB <-> FastPath

vultura

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Re: Plusnet/Router DNS question
« Reply #4 on: February 12, 2019, 12:24:25 AM »

The cached explanation sounds like what's happening here as it reports other 'normal' results for un-cached etc via Steve Gibsons DNS Benchmark, with that in mind it would be best to leave it on 192.168.1.1 with the DNS server set in the router.

for me Plusnet is the fastest but only just (11ms)

thanks again

Have you tested 1.1.1.1 and 1.0.0.1 which claimed to be the fastest by cloudflare.
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Has anyone seen my signature, it seems to have disappeared.

snadge

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Re: Plusnet/Router DNS question
« Reply #5 on: February 12, 2019, 05:57:15 PM »

Have you tested 1.1.1.1 and 1.0.0.1 which claimed to be the fastest by cloudflare.

yeah, they are fast too, virtually the same as plusnet's DNS ...for me anyway, 11-12ms
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Zyxel VMG8924-B10A <-> PlusNET <-> Eci DSLAM
78,500k <-> 6dB <-> FastPath

snadge

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Re: Plusnet/Router DNS question
« Reply #6 on: February 12, 2019, 07:39:04 PM »

actually, I made a better list for DNS benchmark and it reveals that 3 of plusnets 4 DNS servers are ok (not the fastest) but 1 is quite poor, for me BT's DNS where the quickest on all 3 lookups (cached, uncached, www lookup) so I have set them in both the router (other devices) and windows (PC), I know it would seem pointless to set it in my windows PC, but my thinking is if the PC already has the DNS address to 'query' then it doesn't have to get this information from the router (1 less routine to carry out)

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Zyxel VMG8924-B10A <-> PlusNET <-> Eci DSLAM
78,500k <-> 6dB <-> FastPath
 

anything