CentOS 6 ======================================== (As an alternative to this installation, you may prefer to create a FRR rpm package yourself and install that package instead. See instructions in redhat/README.rpm\_build.md on how to build a rpm package) Instructions are tested with ``CentOS 6.8`` on ``x86_64`` platform Warning: -------- ``CentOS 6`` is very old and not fully supported by the FRR community anymore. Building FRR takes multiple manual steps to update the build system with newer packages than what's available from the archives. However, the built packages can still be installed afterwards on a standard ``CentOS 6`` without any special packages. Support for CentOS 6 is now on a best-effort base by the community. CentOS 6 restrictions: ---------------------- - PIMd is not supported on ``CentOS 6``. Upgrade to ``CentOS 7`` if PIMd is needed - MPLS is not supported on ``CentOS 6``. MPLS requires Linux Kernel 4.5 or higher (LDP can be built, but may have limited use without MPLS) - Zebra is unable to detect what bridge/vrf an interface is associcated with (IFLA\_INFO\_SLAVE\_KIND does not exist in the kernel headers, you can use a newer kernel + headers to get this functionality) - frr\_reload.py will not work, as this requires Python 2.7, and CentOS 6 only has 2.6. You can install Python 2.7 via IUS, but it won't work properly unless you compile and install the ipaddr package for it. - Building the package requires Sphinx >= 1.1. Only a non-standard package provides a newer sphinx and requires manual installation (see below) Install required packages ------------------------- Add packages: .. code-block:: shell sudo yum install git autoconf automake libtool make gawk \ readline-devel texinfo net-snmp-devel groff pkgconfig \ json-c-devel pam-devel flex epel-release c-ares-devel Install newer version of bison (CentOS 6 package source is too old) from CentOS 7: .. code-block:: shell sudo yum install rpm-build curl -O http://vault.centos.org/7.0.1406/os/Source/SPackages/bison-2.7-4.el7.src.rpm rpmbuild --rebuild ./bison-2.7-4.el7.src.rpm sudo yum install ./rpmbuild/RPMS/x86_64/bison-2.7-4.el6.x86_64.rpm rm -rf rpmbuild Install newer version of autoconf and automake (Package versions are too old): .. code-block:: shell curl -O http://ftp.gnu.org/gnu/autoconf/autoconf-2.69.tar.gz tar xvf autoconf-2.69.tar.gz cd autoconf-2.69 ./configure --prefix=/usr make sudo make install cd .. curl -O http://ftp.gnu.org/gnu/automake/automake-1.15.tar.gz tar xvf automake-1.15.tar.gz cd automake-1.15 ./configure --prefix=/usr make sudo make install cd .. Install ``Python 2.7`` in parallel to default 2.6. Make sure you've install EPEL (``epel-release`` as above). Then install current ``python27``: ``python27-devel`` and ``pytest`` .. code-block:: shell sudo rpm -ivh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm sudo rpm -ivh https://centos6.iuscommunity.org/ius-release.rpm sudo yum install python27 python27-pip python27-devel sudo pip2.7 install pytest Please note that ``CentOS 6`` needs to keep python pointing to version 2.6 for ``yum`` to keep working, so don't create a symlink for python2.7 to python. Install newer ``Sphinx-Build`` based on ``Python 2.7``. Create a new repo ``/etc/yum.repos.d/puias6.repo`` with the following contents: :: ### Name: RPM Repository for RHEL 6 - PUIAS (used for Sphinx-Build) ### URL: http://springdale.math.ias.edu/data/puias/computational [puias-computational] name = RPM Repository for RHEL 6 - Sphinx-Build baseurl = http://springdale.math.ias.edu/data/puias/computational/$releasever/$basearch #mirrorlist = enabled = 1 protect = 0 gpgkey = gpgcheck = 0 Update rpm database & Install newer sphinx .. code-block:: shell sudo yum update sudo yum install python27-sphinx .. include:: building-libyang.rst 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 ^^^^^^^^^^^^^^^^^^^^^^^ .. code-block:: shell 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.) .. code-block:: shell 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 \ --disable-pimd \ --enable-snmp=agentx \ --enable-multipath=64 \ --enable-user=frr \ --enable-group=frr \ --enable-vty-group=frrvty \ --disable-exampledir \ --disable-ldpd \ --enable-fpm \ --with-pkg-git-version \ --with-pkg-extra-version=-MyOwnFRRVersion \ SPHINXBUILD=sphinx-build2.7 make make check PYTHON=/usr/bin/python2.7 sudo make install Create empty FRR configuration files ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ .. code-block:: shell sudo mkdir /var/log/frr sudo mkdir /etc/frr For integrated config file: .. code-block:: shell sudo touch /etc/frr/frr.conf For individual config files: .. note:: Integrated config is preferred to individual config. .. code-block:: shell sudo touch /etc/frr/babeld.conf sudo touch /etc/frr/bfdd.conf sudo touch /etc/frr/bgpd.conf sudo touch /etc/frr/eigrpd.conf sudo touch /etc/frr/isisd.conf sudo touch /etc/frr/ldpd.conf sudo touch /etc/frr/nhrpd.conf sudo touch /etc/frr/ospf6d.conf sudo touch /etc/frr/ospfd.conf sudo touch /etc/frr/pbrd.conf sudo touch /etc/frr/pimd.conf sudo touch /etc/frr/ripd.conf sudo touch /etc/frr/ripngd.conf sudo touch /etc/frr/staticd.conf sudo touch /etc/frr/zebra.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 ^^^^^^^^^^^^^^^^^^^^^^^^^^ .. code-block:: shell sudo install -p -m 644 redhat/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 ^^^^^^^^^^^^^^^^^^^^^^^^^^^ Edit :file:`/etc/sysctl.conf` and set the following values (ignore the other settings):: # Controls IP packet forwarding net.ipv4.ip_forward = 1 net.ipv6.conf.all.forwarding=1 # Controls source route verification net.ipv4.conf.default.rp_filter = 0 Load the modifed sysctl's on the system: .. code-block:: shell sudo sysctl -p /etc/sysctl.d/90-routing-sysctl.conf Add init.d startup files ^^^^^^^^^^^^^^^^^^^^^^^^ .. code-block:: shell sudo install -p -m 755 redhat/frr.init /etc/init.d/frr sudo chkconfig --add frr Enable FRR daemon at startup ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ .. code-block:: shell sudo chkconfig frr on Start FRR manually (or reboot) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ .. code-block:: shell sudo /etc/init.d/frr start