FreeBSD 9

FreeBSD 9 restrictions:

  • MPLS is not supported on FreeBSD. MPLS requires a Linux Kernel (4.5 or higher). LDP can be built, but may have limited use without MPLS

Install required packages

Add packages: (Allow the install of the package management tool if this is first package install and asked)

pkg install -y git autoconf automake libtool gmake \
    pkgconf texinfo json-c bison flex py36-pytest c-ares \
    python3 py36-sphinx libexecinfo

Make sure there is no /usr/bin/flex preinstalled (and use the newly installed in /usr/local/bin): (FreeBSD frequently provides a older flex as part of the base OS which takes preference in path)

rm -f /usr/bin/flex

For building with clang (instead of gcc), upgrade clang from 3.4 default to 3.6 This is needed to build FreeBSD packages as well - for packages clang is default (Clang 3.4 as shipped with FreeBSD 9 crashes during compile)

pkg install clang36
pkg delete clang34
mv /usr/bin/clang /usr/bin/clang34
ln -s /usr/local/bin/clang36 /usr/bin/clang

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 1.0.184 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 libpcre-dev or pcre-devel.


For Debian-based systems, the official libyang package requires recent versions of swig (3.0.12) and debhelper (11) which are only available in Debian buster (10). However, libyang packages built on Debian buster can be installed on both Debian jessie (8) and Debian stretch (9), as well as various Ubuntu systems. The python3-yang package will not work, but the other packages (libyang-dev is the one needed for FRR) will.

Option 2: Source Install


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

git clone
cd libyang
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

pw groupadd frr -g 101
pw groupadd frrvty -g 102
pw adduser frr -g 101 -u 101 -G 102 -c "FRR suite" \
    -d /usr/local/etc/frr -s /usr/sbin/nologin

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

git clone frr
cd frr
export MAKE=gmake
export LDFLAGS="-L/usr/local/lib"
export CPPFLAGS="-I/usr/local/include"
./configure \
    --sysconfdir=/usr/local/etc/frr \
    --enable-pkgsrcrcdir=/usr/pkg/share/examples/rc.d \
    --localstatedir=/var/run/frr \
    --prefix=/usr/local \
    --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 \
gmake check
sudo gmake install

Create empty FRR configuration files

sudo mkdir /usr/local/etc/frr

For integrated config file:

sudo touch /usr/local/etc/frr/frr.conf

For individual config files:


Integrated config is preferred to individual config.

sudo touch /usr/local/etc/frr/babeld.conf
sudo touch /usr/local/etc/frr/bfdd.conf
sudo touch /usr/local/etc/frr/bgpd.conf
sudo touch /usr/local/etc/frr/eigrpd.conf
sudo touch /usr/local/etc/frr/isisd.conf
sudo touch /usr/local/etc/frr/ldpd.conf
sudo touch /usr/local/etc/frr/nhrpd.conf
sudo touch /usr/local/etc/frr/ospf6d.conf
sudo touch /usr/local/etc/frr/ospfd.conf
sudo touch /usr/local/etc/frr/pbrd.conf
sudo touch /usr/local/etc/frr/pimd.conf
sudo touch /usr/local/etc/frr/ripd.conf
sudo touch /usr/local/etc/frr/ripngd.conf
sudo touch /usr/local/etc/frr/staticd.conf
sudo touch /usr/local/etc/frr/zebra.conf
sudo chown -R frr:frr /usr/local/etc/frr/
sudo touch /usr/local/etc/frr/vtysh.conf
sudo chown frr:frrvty /usr/local/etc/frr/vtysh.conf
sudo chmod 640 /usr/local/etc/frr/*.conf

Enable IP & IPv6 forwarding

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

# Routing: We need to forward packets

Reboot or use sysctl to apply the same config to the running system.