View source for TCP/IP: Quagga OSPF lanjut

1. CASE PRINCIPLE

We will test in this third example a medium difficulty level environment where two routers (Cisco 3750 & Quagga B) are linked together with two OPSF areas, one OSPF area is tagged as stub area.

The Quagga B router and the Cisco 2651 are located in a stub area. They have OPSF intra (O) and inter-area routes (OIA) in their routing tables but no external OSPF route. To route these external OPSF networks like 10.200.1.1 (see next paragraph), there is a default OSPF route to the border router (Quagga A router) on the routers inside area 1.
Quagga A is a border router because it is in area 0 or backbone area and in area 1.

For the purpose of our case study, the 10.200.1.1 static route is redistributed into OSPF on the Quagga A router to "artificially" create an external OPSF network tagged as OE2. Because of the stub area, this network should not be propagated on the Quagga B router and the Cisco 2651.

2. PICTURE

quagga cisco case study opsf advanced 3750 2651 	Functionalities tested:

(click on the web links to have more details about a protocol)

Interface settings

 OSPF - backbone area
 OSPF - multi area
 OSPF - stub area
 Static routing
 Redistribution - static to OSPF
 Telnet access

 
 
 
 
 
 
 

3. CONFIGURATIONS

	You must set your Linux system correctly to launch Quagga successfully.
See the Quagga tutorial for help about this.

LINUX CONFIGURATIONS

Check that the zebra and ospfd daemons are activated:

 #vim /etc/quagga/daemons
 zebra=yes
 bgpd=no
 ospfd=yes
 ospf6d=no
 ripd=no
 ripngd=no
 isisd=no

If you changed your daemons file, restart the quagga service:

 #vim /etc/init.d/quagga restart
 Stopping Quagga daemons (prio:0): ospfd zebra (bgpd) (ripd) (ripngd) (ospf6= d) (isisd).
 Removing all routes made by zebra.
 Nothing to flush.
 Loading capability module if not yet done.
 Starting Quagga daemons (prio:10): zebra ospfd.

Set the Quagga A hostname in the /etc/quagga/vtysh.conf file:

 #vim /etc/quagga/vtysh.conf
 !
 ! Sample
 !
 ! service integrated-vtysh-config
 hostname Quagga_A
 username root nopassword
 !

Set the Quagga B hostname in the /etc/quagga/vtysh.conf file:

 #vim /etc/quagga/vtysh.conf
 !
 ! Sample
 !
 ! service integrated-vtysh-config
 hostname Quagga_B
 username root nopassword
 !

Don't forget to activate the ip forwarding on the Quagga A router!
It is not necessary to activate ip forwarding on the Quagga B router because it has only one network interface.

ROUTERS CONFIGURATIONS

CISCO ROUTER 2651 IOS: 12.2-23a 	QUAGGA ROUTER A 0.99.6

 interface FastEthernet0/1
   ip address 10.1.3.2 255.255.255.0
   no shutdown 	interface eth0
   ip address 10.1.3.1/24
   link-detect
 interface FastEthernet0/0
   ip address 10.1.4.2 255.255.255.0
   no shutdown 	interface eth1
   ip address 10.1.1.1/24
   link-detect
 interface Loopback 1
   ip address 10.200.1.3 255.255.255.255
   	interface lo
   ip address 10.200.1.2/32
   link-detect
 hostname Cisco-2651 	
 	ip route 10.200.1.1/32 10.1.1.2
 router ospf 1
   area 1 stub
   network 10.1.3.0 0.0.0.255 area 1
   network 10.1.4.0 0.0.0.255 area 1
   network 10.200.1.3 0.0.0.0 area 1 	router ospf
   area 1 stub
   network 10.1.3.0/24 area 1
   network 10.1.1.0/24 area 0
   network 10.200.1.2/32 area 0
 line vty 0 4
   no login
 	line vty
   no login
 enable secret password 	enable password password

CISCO SWITCH L3 3750 IOS: 12.2-25.SEE2 	
QUAGGA ROUTER B 0.99.6

 interface vlan 1
   ip address 10.1.1.2 255.255.255.0
   no shutdown 	interface eth0
   ip address 10.1.4.1/24
   link-detect
 interface Loopback 1
   ip address 10.200.1.1 255.255.255.255
   	interface lo
   ip address 10.200.1.4/32
   link-detect
 hostname 3750_L3 	
 router ospf 1
  
   network 10.1.1.0 0.0.0.255 area 0
    	router ospf
   area 1 stub
   network 10.1.4.0/24 area 1
   network 10.200.1.4/32 area 1
 line vty 0 4
   no login
 	line vty 0 4
   no login
 enable secret password
   	enable password password
  
 ip routing
 ip multicast-routing distributed 	

SEE THE ENTIRE CONFIGURATION OF THE DEVICES:

 Quagga A
 Quagga B
 Cisco 2651
 Cisco 3750 L3




4. SHOW COMMANDS

CISCO 3750 L3 		QUAGGA A ROUTER 		CISCO 2651 		QUAGGA B ROUTER
CISCO 3750 LAYER 3

 3750_L3##show interface vlan 1
 3750_L3#show ip route
 3750_L3#show ip ospf interface
 3750_L3#show ip ospf database
 3750_L3#show ip ospf neighbor

QUAGGA A ROUTER

 Quagga_A#show interface description
 Quagga_A#show interface eth0
 Quagga_A (Linux level)#route -n
 Quagga_A#show ip route
 Quagga_A#show ip ospf interface
 Quagga_A#show ip ospf database
 Quagga_A#show ip border-routers
 Quagga_A#show ip neighbor
 Quagga_A#show ip ospf route
 Quagga_A#show ip forwarding

CISCO 2651

 Cisco_2651#show ip interface brief
 Cisco-2651#show interface FastEthernet 0/0
 Cisco-2651#show ip route
 Cisco-2651#show ip ospf border-routers
 Cisco-2651#show ip ospf database
 Cisco-2651#show ip ospf interface

QUAGGA B ROUTER

 Quagga_B#show interface description
 Quagga_B (Linux level)#route -n
 Quagga_B#show ip route
 Quagga_B#show ip ospf border-routers
 Quagga_B#show ip ospf database
 Quagga_B#show ip ospf route
 Quagga_B#show ip forwarding
 Quagga_B#show ip ospf interface
 Quagga_B#traceroute 10.200.1.1