CentOS 7¶
This document describes installation from source. If you want to build an RPM, see Packaging Red Hat.
CentOS 7 restrictions:¶
- MPLS is not supported on
CentOS 7
with default kernel. MPLS requires Linux Kernel 4.5 or higher (LDP can be built, but may have limited use without MPLS)
Install required packages¶
Add packages:
sudo yum install git autoconf automake libtool make \
readline-devel texinfo net-snmp-devel groff pkgconfig \
json-c-devel pam-devel bison flex pytest c-ares-devel \
python-devel systemd-devel python-sphinx libcap-devel
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.
Warning
libyang
version 1.0.184 or newer is required to build FRR.
Note
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
.
Note
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
Note
Ensure that the libyang build requirements
are met before continuing. Usually this entails installing cmake
and
libpcre-dev
or pcre-devel
.
git clone https://github.com/CESNET/libyang.git
cd libyang
mkdir build; cd build
cmake -DENABLE_LYD_PRIV=ON -DCMAKE_INSTALL_PREFIX:PATH=/usr \
-D CMAKE_BUILD_TYPE:String="Release" ..
make
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 groups and user¶
sudo groupadd -g 92 frr
sudo groupadd -r -g 85 frrvty
sudo useradd -u 92 -g 92 -M -r -G frrvty -s /sbin/nologin \
-c "FRR FRRouting suite" -d /var/run/frr 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 \
--bindir=/usr/bin \
--sbindir=/usr/lib/frr \
--sysconfdir=/etc/frr \
--libdir=/usr/lib/frr \
--libexecdir=/usr/lib/frr \
--localstatedir=/var/run/frr \
--with-moduledir=/usr/lib/frr/modules \
--enable-snmp=agentx \
--enable-multipath=64 \
--enable-user=frr \
--enable-group=frr \
--enable-vty-group=frrvty \
--enable-systemd=yes \
--disable-exampledir \
--disable-ldpd \
--enable-fpm \
--with-pkg-git-version \
--with-pkg-extra-version=-MyOwnFRRVersion \
SPHINXBUILD=/usr/bin/sphinx-build
make
make check
sudo make install
Create empty FRR configuration files¶
sudo mkdir /var/log/frr
sudo mkdir /etc/frr
sudo touch /etc/frr/zebra.conf
sudo touch /etc/frr/bgpd.conf
sudo touch /etc/frr/ospfd.conf
sudo touch /etc/frr/ospf6d.conf
sudo touch /etc/frr/isisd.conf
sudo touch /etc/frr/ripd.conf
sudo touch /etc/frr/ripngd.conf
sudo touch /etc/frr/pimd.conf
sudo touch /etc/frr/nhrpd.conf
sudo touch /etc/frr/eigrpd.conf
sudo touch /etc/frr/babeld.conf
sudo chown -R frr:frr /etc/frr/
sudo touch /etc/frr/vtysh.conf
sudo chown frr:frrvty /etc/frr/vtysh.conf
sudo chmod 640 /etc/frr/*.conf
Install daemon config file¶
sudo install -p -m 644 tools/etc/frr/daemons /etc/frr/
sudo chown frr:frr /etc/frr/daemons
Edit /etc/frr/daemons as needed to select the required daemons¶
Look for the section with watchfrr_enable=...
and zebra=...
etc.
Enable the daemons as required by changing the value to yes
Enable IP & IPv6 forwarding¶
Create a new file /etc/sysctl.d/90-routing-sysctl.conf
with the
following content:
# Sysctl for routing
#
# Routing: We need to forward packets
net.ipv4.conf.all.forwarding=1
net.ipv6.conf.all.forwarding=1
Load the modified sysctl’s on the system:
sudo sysctl -p /etc/sysctl.d/90-routing-sysctl.conf
Install frr Service¶
sudo install -p -m 644 tools/frr.service /usr/lib/systemd/system/frr.service
Register the systemd files¶
sudo systemctl preset frr.service
Enable required frr at startup¶
sudo systemctl enable frr
Reboot or start FRR manually¶
sudo systemctl start frr