Public bug reported:
This is a request to backport the following upstream commit which is
present in v4.15.
commit 8db75d1e4001ac4cdfc73d5bedd0ec6d58a3d617
Author: Dustin Byford <dus...@cumulusnetworks.com>
Date: Mon Dec 18 14:57:41 2017 -0800
ethtool: Support for FEC encoding control
As FEC settings and different FEC modes are mandatory
and configurable across various interfaces of 25G/50G/100G/40G,
the lack of FEC encoding control and reporting today is a source
for interoperability issues for many vendors
set-fec/show-fec option(s) are designed to provide control and report
the FEC encoding on the link.
$ethtool --set-fec swp1 encoding [off | RS | BaseR | auto]
Encoding: Types of encoding
Off : Turning off FEC
RS : Force RS-FEC encoding
BaseR : Force BaseR encoding
Auto : Default FEC settings for drivers, and would represent
asking the hardware to essentially go into a best effort mode.
Here are a few examples of what we would expect if encoding=auto:
- if autoneg is on, we are expecting FEC to be negotiated as on or off
as long as protocol supports it
- if the hardware is capable of detecting the FEC encoding on it's
receiver it will reconfigure its encoder to match
- in absence of the above, the configuration would be set to IEEE
defaults.
>From our understanding, this is essentially what most hardware/driver
combinations are doing today in the absence of a way for users to
control the behavior.
$ethtool --show-fec swp1
FEC parameters for swp1:
FEC encodings: RS
ethtool devname output:
$ethtool swp1
Settings for swp1:
root@hpe-7712-03:~# ethtool swp18
Settings for swp18:
Supported ports: [ FIBRE ]
Supported link modes: 40000baseCR4/Full
40000baseSR4/Full
40000baseLR4/Full
100000baseSR4/Full
100000baseCR4/Full
100000baseLR4_ER4/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Supported FEC modes: [RS | BaseR | None | Not reported]
Advertised link modes: Not reported
Advertised pause frame use: No
Advertised auto-negotiation: No
Advertised FEC modes: [RS | BaseR | None | Not reported]
Speed: 100000Mb/s
Duplex: Full
Port: FIBRE
PHYAD: 106
Transceiver: internal
Auto-negotiation: off
Link detected: yes
Signed-off-by: Vidya Sagar Ravipati <vidya.chowd...@gmail.com>
Signed-off-by: Dustin Byford <dus...@cumulusnetworks.com>
[code style + man page edits + commit message update]
Signed-off-by: Dirk van der Merwe <dirk.vanderme...@netronome.com>
Signed-off-by: John W. Linville <linvi...@tuxdriver.com>
** Affects: ethtool (Ubuntu)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1749384
Title:
Support for FEC encoding control
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ethtool/+bug/1749384/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
