Multiple Home Internet Connections, part 2
Configuring OpenWRT based routers for multiple internet connections
Topic
twc
A collection of 9 issues
Multiple Home Internet Connections
With working from home being so popular, the need for reliable internet is even more important
DOCSIS 3.1 and NTP
Spectrum upgraded my area to DOCSIS 3.1 to offer 1G/40M service. I believe they
have it configured for 1.7Gbit shared downstream (using DOCSIS 3.1) and ~100Mbit
shared upstream (sharing the legacy DOCSIS 3.0 upstream channels). This is
unverified because the modem (a Technicolor TC4400-AM) has
SB6183 dropping IPv6 traffic
TL;DR - The Arris SB6183 cable modem is dropping IPv6 TCP traffic with the
timestamp TCP option. See the "Workarounds" section for possible workarounds.
13 months later (October 2016), my modem was updated to
D30CM-OSPREY-1.5.2.3-GA-01-NOSH. IPv6 tests show this problem is fixed with this
SB6183 vs DG1670A latency
See also: SB6183 dropping IPv6 traffic
[https://blog.dan.drown.org/sb6183-dropping-ipv6-traffic/]
Comparing latency in cable modems: SB6183 (16 channel DOCSIS 3 modem only) vs
DG1670A (16 channel DOCSIS 3 modem+router combo, in bridge mode)
Arris DG1670A
Average latency of 100 ICMP echo replies to the default gateway: 20.
Time Warner 300/20 service
Before (50M/5M)
After (300M/20M)
Other notes
DG1670A Firmware Version was updated from 8.0.89 to 8.0.120.
SW_REV: 8.0.120.SIP.PC20.TW
IPv6
$ iperf -f m -i 1 -V -c 2605:6000:x:x -r
------------------------------------------------------------
Server listening on TCP port 5001
TCP
New Time Warner router: Arris DG1670A
See also: Comparison of the Arris SB6183 vs Arris DG1670A
[https://blog.dan.drown.org/sb6183-vs-dg1670a-latency/], and SB6183 dropping IPv6 traffic
[https://blog.dan.drown.org/sb6183-dropping-ipv6-traffic/]
As part of TWC's upgraded speeds (300M/20M coming in August), I needed a 16x4
channel DOCSIS 3.0 modem. Since
ARM router forwarding rates
The goal for this project is 300mbit/s forwarding with full size packets and nat
enabled.
There's problems with this hardware: see "Problems" section below.
test setup
Router hardware: Utilite Standard
[http://utilite-computer.com/web/utilite-models] (note: see the Problems
section)
Network
eth0 - "inside&
ARM-based router
This hardware has problems - see the Problems section
[https://blog.dan.drown.org/arm-router-forwarding-rates/] on the follow-up page.
I have an arm system with two gige ports that I want to turn into a router that
can forward at least 300Mbit/s (with 1500 byte packets). It's