Dynamic routing are becomming more and more common these days, but not on the server side. Actually, Windows 2008 Server no longer supports Open Shortest Path First (OSPF), even though 2003 server did. The most common way of implementing dynamic routing in larger networks, are in the Wide Area Network (WAN) between firewalls. In this guide I will show how to use OSPF in Linux by using the Quagga Software Routing Suite.
As usual I use Debian linux, so let’s start by installing Quagga.
apt-get install quagga
That was not very hard. Let’s take a look at the different configuration files located in /etc/quagga/.
This file enables and disables the different services available in the routing suite. There are several supported protocols such as RIP, BGP and OSPF.
zebra=yes bgpd=no ospfd=yes ospf6d=no ripd=no ripngd=no isisd=no
Zebra is the service that transfers configuration from Quagga to the operating system. Zebra takes care of updating interface addresses, routing tables, hostname, etc.
! hostname server01 log file /var/log/quagga/zebra.log password cliSecretPassword ! interface bond0 ip address 10.0.0.5/24 multicast ! interface eth0 ! interface eth1 ! interface lo
As you can clearly see from this configuration file, the server has hostname server01 and has bonded the eth0 and eth1 to a new bond0 interface.
This file configures the OSPF service. This is not a very advanced setup.
! service advanced-vty log file /var/log/quagga/ospfd.log ! interface bond0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 SECRETPASS ! # Loopback #interface lo # ip ospf priority 0 #! router ospf redistribute static network 10.0.0.0/24 area 0.0.0.0 area 0.0.0.0 authentication message-digest
Here the OSPF service is instructed to join area 0.0.0.0 with key 1 set as SECRETPASS. Also, the service redistributes all static routes. In this example, the server is a stub area.
I will be posting more configuration later.