RIP Routing on Linux with Zebra

Zebra is a daemon that in Unix systems is responsible for managing routing tables. It is responsible for imitating a physical router. Handles routing protocols such as MPLS, BGP, ===

What is Zebra? (Wikipedia)

Zebra it's a devil that in the systems unix It is responsible for managing the routing tables. It is responsible for imitating a router physical. Manages routing protocols such as MPLS,BGP, OSPF, RIP (protocol), ISIS and two more versions of rip and ospf which are aimed at IPv6.

It is used directly in kernels. BSD, solaris, linux; but only versions from 2 or 3 years ago. That does not mean, however, that it is discontinued because in the new kernels of the mentioned Unix it uses quagga like its interface that intervenes through its libraries and turns it into a demon away from the user's hand.

We install Quagga and telnet

Bash

apt-get install quagga telnet

We copy the configuration examples.

We access the directory

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cd /usr/share/doc/quagga/example/

We copy the directories to the configuration file /etc/quagga

Bash

cp zebra.conf.sample vtsh.conf.sample ripd.conf.sample /etc/quagga/

We access the configuration file.

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cd /etc/quagga/

And we modify the names of the copied files.

Bash

mv zebra.conf.sample zebra.conf

Bash

mv vtysh.conf.sample vtysh.conf

Bash

mv ripd.conf.sample ripd.conf

We activate the demons that we are going to use, in my case R.I.P..

We edit the file

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vi daemons

and we activate the protocol to use and zebra

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zebra=yes

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ripd=yes

We edit the file /etc/network/interfaces so that no interface is raised.

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vi  /etc/network/interfaces

We can comment it with a #

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#iface eth0 inet dhcp

We connect (The default password is zebra)

telnet localhost zebra

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Trying ::1…

Trying 127.0.0.1…

Connected to localhost.

Escape character is ‘^]’.

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Hello, this is Quagga (version 0.99.15).

Copyright 1996-2005 Kunihiro Ishiguro, et al.

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User Access Verification

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Password:

We go to the configuration terminal.

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router# configure terminal

In the interface, you obviously have to put the one that corresponds to you.

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router(config)# interface eth0

We assign it an address and a mask.

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router(config-if)# ip address 10.30.0.0/16

We go out and save

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router(config-if)# quit

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router(config)# write

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Configuration saved to /etc/quagga/ripd.conf

In my case I am going to configure 3 more Interfaces, we follow the same procedure.

eth1 interface

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router# configure terminal

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router(config)# interface eth1

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router(config-if)# ip address 10.20.0.0/16

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router(config-if)# quit

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router(config)# write

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Configuration saved to /etc/quagga/ripd.conf

eth2 interface

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router# configure terminal

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router(config)# interface eth2

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router(config-if)# ip address 10.50.0.0/16

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router(config-if)# quit

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router(config)# write

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Configuration saved to /etc/quagga/ripd.conf

eth3 interface

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router# configure terminal

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router(config)# interface eth2

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router(config-if)# ip address 10.40.0.0/16

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router(config-if)# quit

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router(config)# write

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Configuration saved to /etc/quagga/ripd.conf

We activate forwarding so that it routes.

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#echo “1″ > /proc/sys/net/ipv4/ip_forward

To leave it permanent we redirect the output to the file /etc/sysctl.conf

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#echo “net.ipv4.ip_forward = 1″ >> /etc/sysctl.conf

And finally we tell iptables to accept those forwards

Bash

iptables -A FORWARD -j ACCEPT

Bash

iptables -t nat -A POSTROUTING -s 10.30.0.0/16-o eth0 -j MASQUERADE

Bash

iptables -t nat -A POSTROUTING -s 10.20.0.0/16 -o eth1 -j MASQUERADE

Bash

iptables -t nat -A POSTROUTING -s 10.40.0.0/16 -o eth3 -j MASQUERADE

Bash

iptables -t nat -A POSTROUTING -s 10.50.0.0/16 -o eth2 -j MASQUERADE

More information related to it:

quagga

cisco

I will expand on this, I hope it helps you.

Greetings Rokitoh

:wq!

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