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Standard User candlerb
(experienced) Sun 29-Mar-20 09:34:32
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Re: FTTP 500 & 1Gb Prices are out


[re: PaulKirby] [link to this post]
 
In reply to a post by PaulKirby:
WAN - LAN Throughput (Mbps) 940
LAN - WAN Throughput (Mbps) 940

I cannot see any that are higher.


You won't.

On a gigabit ethernet connection, with IPv4, PPPoE and 1500 byte ethernet frames, the TCP, IP and Ethernet headers will give a remaining usable throughput of about 940Mbps.

- Ethernet frame data portion: 1500 bytes
- Ethernet headers and preamble/trailer: 38
- Total frame size: 1538 (without dot1q VLAN tagging)

The frame contains
- PPPoE header: 8
- IP header: 20 (IPv4) or 40 (IPv6)
- TCP header: 20 (without timestamp option) or 28 (with timestamp option)
- Payload (MSS): 1500-8-20-20 = 1452 best case

Throughput: 1452/1538 * 1000000000 = 944Mbps without TCP timestamp option, or 1444/1538 => 939Mbps with timestamp option

With IPv6 and TCP timestamp option, drops further to 926Mbps.

Note: the fact that you can fill a gigabit with maximum-sized frames doesn't mean your router will be able to fill it with real traffic with a mix of packet sizes. Smaller packets mean more packets-per-second, which mean more routing/filtering/NAT work for the CPU to do.
Standard User PaulKirby
(knowledge is power) Sun 29-Mar-20 11:10:06
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Re: FTTP 500 & 1Gb Prices are out


[re: candlerb] [link to this post]
 
In reply to a post by candlerb:
You won't.

On a gigabit ethernet connection, with IPv4, PPPoE and 1500 byte ethernet frames, the TCP, IP and Ethernet headers will give a remaining usable throughput of about 940Mbps.

- Ethernet frame data portion: 1500 bytes
- Ethernet headers and preamble/trailer: 38
- Total frame size: 1538 (without dot1q VLAN tagging)

The frame contains
- PPPoE header: 8
- IP header: 20 (IPv4) or 40 (IPv6)
- TCP header: 20 (without timestamp option) or 28 (with timestamp option)
- Payload (MSS): 1500-8-20-20 = 1452 best case

Throughput: 1452/1538 * 1000000000 = 944Mbps without TCP timestamp option, or 1444/1538 => 939Mbps with timestamp option

With IPv6 and TCP timestamp option, drops further to 926Mbps.

Note: the fact that you can fill a gigabit with maximum-sized frames doesn't mean your router will be able to fill it with real traffic with a mix of packet sizes. Smaller packets mean more packets-per-second, which mean more routing/filtering/NAT work for the CPU to do.

Yeah that's what I thought, I already knew about all the packet -> frame / headers etc, just wanted to make sure.

Having that confirmed allows me to look into a smaller set of routers along with setting up one with PC parts from my last PC and 2 old Intel 1Gbit PCIe Lan cards, might even have a dual port Intel card.

One thing I haven't looked into yet is my SamKnows White box, that "might" have to be removed, unless it can be setup and not a through device and that of just a tester.

Paul

Standard User CarlTSpeak
(member) Sun 29-Mar-20 11:38:09
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Re: FTTP 500 & 1Gb Prices are out


[re: candlerb] [link to this post]
 
Could've just stopped at the first line.

Building better networks, not just faster ones.


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Standard User jchamier
(eat-sleep-adslguide) Sun 29-Mar-20 11:58:01
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Re: FTTP 500 & 1Gb Prices are out


[re: j0hn83] [link to this post]
 
In reply to a post by j0hn83:
Neither Sky or Talktalk use PPP over the OpenReach network.
Okay, its the BTw network I was thinking of.

20 years of broadband connectivity since 1999 trial - Live BQM
Standard User epyon
(fountain of knowledge) Sun 29-Mar-20 12:27:02
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Re: FTTP 500 & 1Gb Prices are out


[re: CarlTSpeak] [link to this post]
 
What else do we have to do ? may aswell put in some extra effort.

Standard User CarlTSpeak
(member) Sun 29-Mar-20 13:50:30
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Re: FTTP 500 & 1Gb Prices are out


[re: epyon] [link to this post]
 
In reply to a post by epyon:
What else do we have to do ? may aswell put in some extra effort.


I've a few things rolling. Your mileage may vary.

Building better networks, not just faster ones.
Standard User oldskool
(member) Sun 29-Mar-20 16:38:49
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Re: FTTP 500 & 1Gb Prices are out


[re: CarlTSpeak] [link to this post]
 
Curious to know what routers people may be planning to use with gigabit WAN connections?

Iíd like to get something capable and was planning on TPLink TL-R600VPN v4

But it says the NAT throughput is only 640Mbps. I assume if someone is uploading and downloading a lot itís likely throughput wonít manage to get above 300Mbps

NAT throughput is something I hadnít thought about much. Link speed and throughput are very different things.

So what third party router (donít need WiFi) should I use?

Ps the confusing thing is for somethingís Iíve read, ISP routers seem to out perform these business grade routers on speed. I donít get it.
Standard User Rolandrat
(committed) Sun 29-Mar-20 17:24:32
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Re: FTTP 500 & 1Gb Prices are out


[re: oldskool] [link to this post]
 
I bought a Unifi Dream Machine Pro to eventually use with BT FTTP & City fibre, but I found it currently too limiting with routing, so bought a Draytek 3910 upto 8 WAN's, 2x10Gbe, 2x2.5Gbe & 4x1Gbe and 4x 1Gbe LAN (dedicated). >8Gbe NAT Throughput.
I should say the first 8 ports are selectable wan or lan, so I can feed my 10Gbe lan.

Edited by Rolandrat (Sun 29-Mar-20 17:50:29)

Standard User PaulKirby
(knowledge is power) Sun 29-Mar-20 17:49:55
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Re: FTTP 500 & 1Gb Prices are out


[re: oldskool] [link to this post]
 
I am currently looking at these three, not too fussed if it has wireless or not due to I can just add wireless access points.

ASUS RT-AC86U Wi-Fi AC2900
MikroTik Tik RB4011iGS+RM (still not sure this will handle the speed though)
NETGEAR Nighthawk X6S Smart Wifi Router (R8000P)

And also possibly setting one up from PC Hardware.

But I will probably use the Smarthub 2 while I look into them, don't want to rush into it.

I am liking the look of the MikroTik Tik RB4011iGS+RM though.

Paul

Standard User acting_funny
(member) Sun 29-Mar-20 18:09:06
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Re: FTTP 500 & 1Gb Prices are out


[re: PaulKirby] [link to this post]
 
might be worth checking if the routers support BT's /56 ipv6 natively also, the ac86u does it without fuss.
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