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zvirus
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Expected Latency on FTTP

Hi,

 

What is expected latency on Virgin M200 Fibre?

When pinging bbc.co.uk getting average 25ms delays

When was on FTTC VDSL it was average 13ms delays (bbc.co.uk) on a COPPER wire:

 

>ping bbc.co.uk

Pinging bbc.co.uk [151.101.128.81] with 32 bytes of data:
Reply from 151.101.128.81: bytes=32 time=13ms TTL=58
Reply from 151.101.128.81: bytes=32 time=13ms TTL=58
Reply from 151.101.128.81: bytes=32 time=13ms TTL=58
Reply from 151.101.128.81: bytes=32 time=13ms TTL=58

 

Why?

 

Thx

Tomas

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Anonymous
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Re: Expected Latency on FTTP

sounds about right
are you on true fttp or fttc
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zvirus
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Re: Expected Latency on FTTP

Thank You for your reply.

 

I think its FTTP I was on FTTC with TalkTalk

Around 15m fibre optic from street cab to my house`s wall and then 1.5m coax to the Hub...

Im little bit disappointed... not a lot...

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Pars
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Re: Expected Latency on FTTP

I'm on FTTP and I get this:

Pinging bbc.co.uk [151.101.0.81] with 32 bytes of data:
Reply from 151.101.0.81: bytes=32 time=12ms TTL=58
Reply from 151.101.0.81: bytes=32 time=11ms TTL=58
Reply from 151.101.0.81: bytes=32 time=11ms TTL=58
Reply from 151.101.0.81: bytes=32 time=10ms TTL=58

Ping statistics for 151.101.0.81:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 10ms, Maximum = 12ms, Average = 11ms
M350 over FTTP
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Eeeps
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Re: Expected Latency on FTTP


@zvirus wrote:

Thank You for your reply.

 

I think its FTTP I was on FTTC with TalkTalk

Around 15m fibre optic from street cab to my house`s wall and then 1.5m coax to the Hub...

Im little bit disappointed... not a lot...


Firstly why your ping jitter will be worst on DOCSIS. Take a look at your modem configuration. You see...

Primary Upstream Service Flow

SFID152723
Max Traffic Rate38520000
Max Traffic Burst42600
Min Traffic Rate0
Max Concatenated Burst16320
Scheduling TypeBestEffort

 

So when sending data back from your modem to the CTMS you have to wait (a variable amount of time) to get a time slot to transmit.
As the upstream load increases the potential for immediate upstream slots decreases.
This is why your BQM gets more ragged during daytime hours.

Regarding the type of connection you have; it makes no difference. Even with true FTTP, DOCSIS is still used. (BTW the street cabinet has very little equipment in it - just an amplifier for coax systems or an optical splitter for optical systems)

The reason you get better jitter on a VDSL line is that even though it may be a piece of 'wet string', it is yours - it's not shared. The VDSL modem can transmit when it wants - it doesn't need to wait for your neighbours.

Funny thing is that the newer optical networks (that incudes Open Reach) are shared too, so whilst they have a better available bandwidth they still have to multiplex the upstream and share the downstream. 

zvirus
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Re: Expected Latency on FTTP

And this is answer i was looking for... THANK YOU!!!😀

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zvirus
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Re: Expected Latency on FTTP


@Pars wrote:
I'm on FTTP and I get this:

Pinging bbc.co.uk [151.101.0.81] with 32 bytes of data:
Reply from 151.101.0.81: bytes=32 time=12ms TTL=58
Reply from 151.101.0.81: bytes=32 time=11ms TTL=58
Reply from 151.101.0.81: bytes=32 time=11ms TTL=58
Reply from 151.101.0.81: bytes=32 time=10ms TTL=58

Ping statistics for 151.101.0.81:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 10ms, Maximum = 12ms, Average = 11ms

You must be a bit closer to bbc server than me...

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Pars
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Re: Expected Latency on FTTP

We're probably pinging from the same country!
M350 over FTTP
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Eeeps
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Re: Expected Latency on FTTP

Having said all that your base ping does seem a bit high

For me on coax from Macclesfield...

PING bbc.co.uk (151.101.128.81): 56 data bytes
64 bytes from 151.101.128.81: seq=0 ttl=58 time=12.554 ms
64 bytes from 151.101.128.81: seq=1 ttl=58 time=11.062 ms
64 bytes from 151.101.128.81: seq=2 ttl=58 time=8.860 ms
64 bytes from 151.101.128.81: seq=3 ttl=58 time=9.119 ms

Could you try a traceroute to bbc.co.uk?

 

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zvirus
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Re: Expected Latency on FTTP

Trace route Co. Down to BBC USING OpenVPN client (on router):

 

Tracing route to bbc.co.uk [151.101.0.81]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms R7000 [192.168.2.1]
2 * 24 ms * 10.17.232.1
3 * * * Request timed out.
4 * * * Request timed out.
5 * 25 ms 24 ms 37.120.220.64
6 25 ms 25 ms * te-8-5-0.bb1.lon1.uk.m247.com [176.10.82.161]
7 32 ms 32 ms * 5.57.81.59
8 * 26 ms 24 ms 151.101.0.81

Trace  routre bbc.co.uk Virgin Network:

 

Tracing route to bbc.co.uk [151.101.0.81]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms R7000 [192.168.2.1]
2 13 ms 12 ms 10 ms 10.25.60.1
3 12 ms 13 ms 12 ms belf-core-2a-xe-308-0.network.virginmedia.net [62.254.32.245]
4 * * * Request timed out.
5 * * * Request timed out.
6 25 ms 24 ms 23 ms tcl5-ic-5-ae0-0.network.virginmedia.net [62.254.84.66]
7 24 ms 24 ms 24 ms 157.52.127.10
8 23 ms 24 ms 21 ms 151.101.0.81

 

BTW: Hop #2 ip 10.25.60.1 why doe it look like Im in a tunnel????? This is PRIVATE IP

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