Ubuntu 16.04LTS

  • MPLS is not supported on Ubuntu 16.04 with default kernel. MPLS requires Linux Kernel 4.5 or higher (LDP can be built, but may have limited use without MPLS) For an updated Ubuntu Kernel, see http://kernel.ubuntu.com/~kernel-ppa/mainline/

Install required packages

Add packages:

apt-get install \
   git autoconf automake libtool make gawk libreadline-dev texinfo dejagnu \
   pkg-config libpam0g-dev libjson-c-dev bison flex python-pytest \
   libc-ares-dev python3-dev libsystemd-dev python-ipaddress \
   python3-sphinx install-info

The libyang library can be installed from third-party packages available here.

Note: the libyang dev/devel packages need to be installed in addition to the libyang core package in order to build FRR successfully.

For example, for CentOS 7.x:

wget https://ci1.netdef.org/artifact/LIBYANG-YANGRELEASE/shared/build-1/CentOS-7-x86_64-Packages/libyang-0.16.46-0.x86_64.rpm
wget https://ci1.netdef.org/artifact/LIBYANG-YANGRELEASE/shared/build-1/CentOS-7-x86_64-Packages/libyang-devel-0.16.46-0.x86_64.rpm
sudo rpm -i libyang-0.16.46-0.x86_64.rpm libyang-devel-0.16.46-0.x86_64.rpm

or Ubuntu 18.04:

wget https://ci1.netdef.org/artifact/LIBYANG-YANGRELEASE/shared/build-1/Ubuntu-18.04-x86_64-Packages/libyang-dev_0.16.46_amd64.deb
wget https://ci1.netdef.org/artifact/LIBYANG-YANGRELEASE/shared/build-1/Ubuntu-18.04-x86_64-Packages/libyang_0.16.46_amd64.deb
sudo apt install libpcre3-dev
sudo dpkg -i libyang-dev_0.16.46_amd64.deb libyang_0.16.46_amd64.deb

Alternatively, libyang can be built and installed manually by following the steps below:

git clone https://github.com/opensourcerouting/libyang
cd libyang
git checkout -b tmp origin/tmp
mkdir build; cd build
cmake -DENABLE_LYD_PRIV=ON ..
make
sudo make install

When building libyang on CentOS 6, it’s also necessary to pass the -DENABLE_CACHE=OFF parameter to cmake.

Note: please check the libyang build requirements first.

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 groups and user

sudo groupadd -r -g 92 frr
sudo groupadd -r -g 85 frrvty
sudo adduser --system --ingroup frr --home /var/run/frr/ \
   --gecos "FRR suite" --shell /sbin/nologin frr
sudo usermod -a -G frrvty frr

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
./configure \
    --prefix=/usr \
    --enable-exampledir=/usr/share/doc/frr/examples/ \
    --localstatedir=/var/run/frr \
    --sbindir=/usr/lib/frr \
    --sysconfdir=/etc/frr \
    --enable-multipath=64 \
    --enable-user=frr \
    --enable-group=frr \
    --enable-vty-group=frrvty \
    --enable-configfile-mask=0640 \
    --enable-logfile-mask=0640 \
    --enable-fpm \
    --enable-systemd=yes \
    --with-pkg-git-version \
    --with-pkg-extra-version=-MyOwnFRRVersion
make
make check
sudo make install

Create empty FRR configuration files

sudo install -m 755 -o frr -g frr -d /var/log/frr
sudo install -m 775 -o frr -g frrvty -d /etc/frr
sudo install -m 640 -o frr -g frr /dev/null /etc/frr/zebra.conf
sudo install -m 640 -o frr -g frr /dev/null /etc/frr/bgpd.conf
sudo install -m 640 -o frr -g frr /dev/null /etc/frr/ospfd.conf
sudo install -m 640 -o frr -g frr /dev/null /etc/frr/ospf6d.conf
sudo install -m 640 -o frr -g frr /dev/null /etc/frr/isisd.conf
sudo install -m 640 -o frr -g frr /dev/null /etc/frr/ripd.conf
sudo install -m 640 -o frr -g frr /dev/null /etc/frr/ripngd.conf
sudo install -m 640 -o frr -g frr /dev/null /etc/frr/pimd.conf
sudo install -m 640 -o frr -g frr /dev/null /etc/frr/ldpd.conf
sudo install -m 640 -o frr -g frr /dev/null /etc/frr/nhrpd.conf
sudo install -m 640 -o frr -g frrvty /dev/null /etc/frr/vtysh.conf

Enable IPv4 & IPv6 forwarding

Edit /etc/sysctl.conf and uncomment the following values (ignore the other settings)

# Uncomment the next line to enable packet forwarding for IPv4
net.ipv4.ip_forward=1

# Uncomment the next line to enable packet forwarding for IPv6
#  Enabling this option disables Stateless Address Autoconfiguration
#  based on Router Advertisements for this host
net.ipv6.conf.all.forwarding=1

Enable MPLS Forwarding (with Linux Kernel >= 4.5)

Edit /etc/sysctl.conf and the following lines. Make sure to add a line equal to net.mpls.conf.eth0.input or each interface used with MPLS

# Enable MPLS Label processing on all interfaces
net.mpls.conf.eth0.input=1
net.mpls.conf.eth1.input=1
net.mpls.conf.eth2.input=1
net.mpls.platform_labels=100000

Add MPLS kernel modules

Add the following lines to /etc/modules-load.d/modules.conf:

# Load MPLS Kernel Modules
mpls-router
mpls-iptunnel

Reboot or use sysctl -p to apply the same config to the running system

Install the systemd service (if rebooted from last step, change directory back to frr directory)

sudo install -m 644 tools/frr.service /etc/systemd/system/frr.service
sudo install -m 644 tools/etc/frr/daemons /etc/frr/daemons
sudo install -m 644 tools/etc/frr/frr.conf /etc/frr/frr.conf
sudo install -m 644 -o frr -g frr tools/etc/frr/vtysh.conf /etc/frr/vtysh.conf

Enable daemons

Edit /etc/frr/daemons and change the value from “no” to “yes” for those daemons you want to start by systemd.
For example.
zebra=yes
bgpd=yes
ospfd=yes
ospf6d=yes
ripd=yes
ripngd=yes
isisd=yes

Enable the systemd service

  • systemctl enable frr

Start the systemd service

  • systemctl start frr
  • use systemctl status frr to check its status.