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
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-126.96.36.199-GA-01-NOSH. IPv6 tests show this problem is fixed with this firmware. The
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.
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
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 the Arris
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" - 10.1.6.1/
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 a dual-core