FreeBSD 13

FreeBSD 13 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
PIM for IPv6 is not currently supported on FreeBSD.

Install required packages

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

pkg install git autoconf automake libtool gmake json-c pkgconf \
   bison py39-pytest c-ares py39-sphinx texinfo libunwind libyang2

Note

The libunwind library is optional but highly recommended, as it improves backtraces printed for crashes and debugging. However, if it is not available for some reason, it can simply be left out without any loss of functionality.

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

Download Source, configure and compile it

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

git clone https://github.com/frrouting/frr.git frr
cd frr
./bootstrap.sh
export MAKE=gmake LDFLAGS=-L/usr/local/lib CPPFLAGS=-I/usr/local/include
./configure \
    --sysconfdir=/usr/local/etc \
    --localstatedir=/var \
    --enable-pkgsrcrcdir=/usr/pkg/share/examples/rc.d \
    --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 \
    --with-pkg-extra-version=-MyOwnFRRVersion
gmake
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:

Note

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
net.inet.ip.forwarding=1
net.inet6.ip6.forwarding=1

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