Public bug reported:
1.
% lsb_release -rd
Description: Ubuntu 16.04 LTS
Release: 16.04
2. % apt-cache policy bridge-utils
bridge-utils:
Installed: 1.5-9ubuntu1
Candidate: 1.5-9ubuntu1
Version table:
*** 1.5-9ubuntu1 500
500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
100 /var/lib/dpkg/status
3. % brctl setgcint br0 2
Should set the gc_timer value of a bridge, value printed out via brctl showstp
br0
% brctl showstp br0 | grep gc
topology change timer 0.00 gc timer 84.08
4. % brctl setgcint br0 2
never heard of command [setgcint]
Usage: brctl [commands]
commands:
addbr <bridge> add bridge
delbr <bridge> delete bridge
addif <bridge> <device> add interface to bridge
delif <bridge> <device> delete interface from bridge
hairpin <bridge> <port> {on|off} turn hairpin on/off
setageing <bridge> <time> set ageing time
setbridgeprio <bridge> <prio> set bridge priority
setfd <bridge> <time> set bridge forward delay
sethello <bridge> <time> set hello time
setmaxage <bridge> <time> set max message age
setpathcost <bridge> <port> <cost> set path cost
setportprio <bridge> <port> <prio> set port priority
show [ <bridge> ] show a list of bridges
showmacs <bridge> show a list of mac addrs
showstp <bridge> show bridge stp info
stp <bridge> {on|off} turn stp on/off
Checking source code of bridge-utils, there seems to be no code that lets one
actually set this value, nor does it appear that the kernel ioctl interface
allows for modifying gc_timer, (it appears to be a read-only field).
This must mean the documentation included in bridge-utils (specifically
in bridge-utils-interfaces manpage about including a bridge_gcint value
in /etc/network/interfaces to control this is incorrect.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: bridge-utils 1.5-9ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: GNOME-Flashback:GNOME
Date: Fri Apr 29 15:53:52 2016
Dependencies:
gcc-6-base 6.0.1-0ubuntu1
libc6 2.23-0ubuntu3
libgcc1 1:6.0.1-0ubuntu1
InstallationDate: Installed on 2016-01-01 (119 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20151209)
SourcePackage: bridge-utils
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: bridge-utils (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug xenial
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https://bugs.launchpad.net/bugs/1576858
Title:
brctl provides no way to set gc_timer value of a bridge
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