OpenBSD 6

Install required packages

Configure PKG_PATH

export PKG_PATH=$(uname -r)/packages/$(machine -a)/

Add packages:

pkg_add clang libcares python3
pkg_add git autoconf-2.69p2 automake-1.15.1 libtool bison
pkg_add gmake json-c py-test py-sphinx libexecinfo protobuf-c

Select Python2.7 as default (required for pytest)

ln -s /usr/local/bin/python2.7 /usr/local/bin/python

FRR depends on the relatively new libyang library to provide YANG/NETCONF support. Unfortunately, most distributions do not yet offer a libyang package from their repositories. Therefore we offer two options to install this library.

Option 1: Binary Install

The FRR project builds some binary libyang packages.

RPM packages are at our RPM repository.

DEB packages are available as CI artifacts here.


libyang version 2.1.128 or newer is required to build FRR.


The libyang development packages need to be installed in addition to the libyang core package in order to build FRR successfully. Make sure to download and install those from the link above alongside the binary packages.

Depending on your platform, you may also need to install the PCRE development package. Typically this is libpcre2-dev or pcre2-devel.

Option 2: Source Install


Ensure that the libyang build requirements are met before continuing. Usually this entails installing cmake and libpcre2-dev or pcre2-devel.

git clone
cd libyang
git checkout v2.1.128
mkdir build; cd build
      -D CMAKE_BUILD_TYPE:String="Release" ..
sudo make install

Get FRR, compile it and install it (from Git)

This assumes you want to build and install FRR from source and not using any packages

Add frr group and user

groupadd -g 525 _frr
groupadd -g 526 _frrvty
useradd -g 525 -u 525 -c "FRR suite" -G _frrvty \
    -d /nonexistent -s /sbin/nologin _frr

Download Source, configure and compile it

(You may prefer different options on configure statement. These are just an example)


In openbsd the proper links for the libyang library may not have been created.

ln -s /usr/lib/ /usr/lib/


openbsd since version 6.2 has clang as the default compiler so to build frr, clang must be used (the included gcc version is very old).

git clone frr
cd frr
export AUTOCONF_VERSION="2.69"
export AUTOMAKE_VERSION="1.15"
export LDFLAGS="-L/usr/local/lib"
export CPPFLAGS="-I/usr/local/include"
./configure \
    --sysconfdir=/etc \
    --localstatedir=/var \
    --enable-multipath=64 \
    --enable-user=_frr \
    --enable-group=_frr \
    --enable-vty-group=_frrvty \
    --enable-configfile-mask=0640 \
    --enable-logfile-mask=0640 \
    --enable-fpm \
    --with-pkg-git-version \
    --with-pkg-extra-version=-MyOwnFRRVersion \
gmake check
doas gmake install

Create empty FRR configuration files

doas mkdir /var/frr
doas chown _frr:_frr /var/frr
doas chmod 755 /var/frr
doas mkdir /etc/frr
doas touch /etc/frr/zebra.conf
doas touch /etc/frr/bgpd.conf
doas touch /etc/frr/ospfd.conf
doas touch /etc/frr/ospf6d.conf
doas touch /etc/frr/isisd.conf
doas touch /etc/frr/ripd.conf
doas touch /etc/frr/ripngd.conf
doas touch /etc/frr/pimd.conf
doas touch /etc/frr/ldpd.conf
doas touch /etc/frr/nhrpd.conf
doas chown -R _frr:_frr /etc/frr
doas touch /etc/frr/vtysh.conf
doas chown -R _frr:_frrvty /etc/frr/vtysh.conf
doas chmod 750 /etc/frr
doas chmod 640 /etc/frr/*.conf

Enable IP & IPv6 forwarding

Add the following lines to the end of /etc/rc.conf:

net.inet6.ip6.forwarding=1      # 1=Permit forwarding of IPv6 packets
net.inet6.ip6.mforwarding=1     # 1=Permit forwarding of IPv6 multicast packets
net.inet6.ip6.multipath=1       # 1=Enable IPv6 multipath routing

Reboot to apply the config to the system

Enable MPLS Forwarding

To enable MPLS forwarding on a given interface, use the following command:

doas ifconfig em0 mpls

Alternatively, to make MPLS forwarding persistent across reboots, add the “mpls” keyword in the hostname.* files of the desired interfaces. Example:

cat /etc/hostname.em0
inet mpls

Install rc.d init files

(create them in /etc/rc.d - no example are included at this time with FRR source)

Example (for zebra - store as /etc/rc.d/

# $OpenBSD: frr_zebra.rc,v 1.1 2013/04/18 20:29:08 sthen Exp $

daemon="/usr/local/sbin/zebra -d"

. /etc/rc.d/rc.subr

rc_cmd $1

Enable FRR processes

(Enable the required processes only)

echo "frr_zebra=YES" >> /etc/rc.conf
echo "frr_bgpd=YES" >> /etc/rc.conf
echo "frr_ospfd=YES" >> /etc/rc.conf
echo "frr_ospf6d=YES" >> /etc/rc.conf
echo "frr_isisd=YES" >> /etc/rc.conf
echo "frr_ripngd=YES" >> /etc/rc.conf
echo "frr_ripd=YES" >> /etc/rc.conf
echo "frr_pimd=YES" >> /etc/rc.conf
echo "frr_ldpd=YES" >> /etc/rc.conf