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Building FRR on CentOS 6 from Git Source
========================================
(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
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.
Install required packages
-------------------------
Add packages:
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 perl-XML-LibXML \
c-ares-devel
Install newer version of bison (CentOS 6 package source is too old) from
CentOS 7
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)
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`
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
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 frrvt
sudo useradd -u 92 -g 92 -M -r -G frrvt -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 \
--disable-pimd \
--enable-snmp=agentx \
--enable-multipath=64 \
--enable-ospfclient=yes \
--enable-ospfapi=yes \
--enable-user=frr \
--enable-group=frr \
--enable-vty-group=frrvt \
--enable-rtadv \
--disable-exampledir \
--enable-watchfrr \
--disable-ldpd \
--enable-fpm \
--enable-nhrpd \
--enable-eigrpd \
--enable-babeld \
--with-pkg-git-version \
--with-pkg-extra-version=-MyOwnFRRVersion
make
make check PYTHON=/usr/bin/python2.7
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/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:frrvt /etc/frr/vtysh.conf
sudo chmod 640 /etc/frr/*.conf
### Install daemon config file
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 `/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:
sudo sysctl -p /etc/sysctl.d/90-routing-sysctl.conf
### Add init.d startup files
sudo install -p -m 755 redhat/frr.init /etc/init.d/frr
sudo chkconfig --add frr
### Enable frr daemon at startup
sudo chkconfig frr on
### Start FRR manually (or reboot)
sudo /etc/init.d/frr start
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