Mininet-containernet 5 Dynamic Routing OSPF

Topology

Script

#!/usr/bin/env python

from mininet.net import Containernet 
from mininet.cli import CLI
from mininet.link import TCLink, Link
from mininet.log import info, setLogLevel
 
if '__main__' == __name__:
  setLogLevel('info')
  net = Containernet()
  h1 = net.addHost('h1')
  h2 = net.addHost('h2')
  r1 = net.addDocker('r1', dimage="kathara/quagga:latest", volumes=["/home/user/server-test/test-quagga-ospf/dynamic_routing/r1/quagga:/etc/quagga"])
  r2 = net.addDocker('r2', dimage="kathara/quagga:latest", volumes=["/home/user/server-test/test-quagga-ospf/dynamic_routing/r2/quagga:/etc/quagga"])
  r3 = net.addDocker('r3', dimage="kathara/quagga:latest", volumes=["/home/user/server-test/test-quagga-ospf/dynamic_routing/r3/quagga:/etc/quagga"])
  net.addLink(h1, r1)
  net.addLink(h2, r2)
  net.addLink(r1, r2)
  net.addLink(r1, r3)
  net.addLink(r2, r3)
  net.build()
 
  r1.cmd("ifconfig r1-eth0 0")
  r1.cmd("ifconfig r1-eth1 0")
  r1.cmd("ifconfig r1-eth2 0")
  r2.cmd("ifconfig r2-eth0 0")
  r2.cmd("ifconfig r2-eth1 0")
  r2.cmd("ifconfig r2-eth2 0")
  r3.cmd("ifconfig r3-eth0 0")
  r3.cmd("ifconfig r3-eth1 0")
  r1.cmd("ip addr add 192.168.1.254/24 brd + dev r1-eth0")
  r1.cmd("ip addr add 12.1.1.1/24 brd + dev r1-eth1")
  r1.cmd("ip addr add 13.1.1.1/24 brd + dev r1-eth2")
  r2.cmd("ip addr add 192.168.2.254/24 brd + dev r2-eth0")
  r2.cmd("ip addr add 12.1.1.2/24 brd + dev r2-eth1")
  r2.cmd("ip addr add 23.1.1.2/24 brd + dev r2-eth2")
  r3.cmd("ip addr add 13.1.1.3/24 brd + dev r3-eth0")
  r3.cmd("ip addr add 23.1.1.3/24 brd + dev r3-eth1")
  r1.cmd("/etc/init.d/quagga restart")	
  r2.cmd("/etc/init.d/quagga restart")
  r3.cmd("/etc/init.d/quagga restart")
  h1.cmd("ifconfig h1-eth0 0")
  h1.cmd("ip address add 192.168.1.1/24 dev h1-eth0")
  h1.cmd("ip route add default via 192.168.1.254 dev h1-eth0")
  h2.cmd("ifconfig h2-eth0 0")
  h2.cmd("ip address add 192.168.2.1/24 dev h2-eth0")
  h2.cmd("ip route add default via 192.168.2.254 dev h2-eth0")
  CLI(net)
  net.stop()

R1 OSPF configured File

root@ubuntu:/home/user/server-test/test-quagga-ospf/dynamic_routing/r1/quagga# cat ospfd.conf 
hostname R1
password zebra
router ospf
 ospf router-id 12.1.1.1
 network 192.168.1.0/24 area 0.0.0.0
 network 12.1.1.0/24 area 0.0.0.0
 network 13.1.1.0/24 area 0.0.0.0
log file /var/log/quagga/zebra.log

R1 login (OSPF)

root@ubuntu:/home/user/Desktop# docker exec -it f691 bash
root@r1:/# nc localhost 2603
bash: nc: command not found
root@r1:/# nc localhost 2604
bash: nc: command not found
root@r1:/# telnet localhost 2604
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.

Hello, this is Quagga (version 1.0.20160315).
Copyright 1996-2005 Kunihiro Ishiguro, et al.


User Access Verification

Password: 
R1> 

Privilege Mode

enable 

Lookup OSPF info

R1# show ip ospf

OSPF Routing Process, Router ID: 12.1.1.1
Area ID: 0.0.0.0 (Backbone)
   Number of interfaces in this area: Total: 3, Active: 3
   Number of fully adjacent neighbors in this area: 2
   Area has no authentication

Show ospf Neighbor (r1)

R1# show ip ospf neighbor

    Neighbor ID Pri State           Dead Time Address         Interface            RXmtL RqstL DBsmL
12.1.1.2          1 Full/DR           35.437s 12.1.1.2        r1-eth1:12.1.1.1         0     0     0
13.1.1.3          1 Full/DR           36.582s 13.1.1.3        r1-eth2:13.1.1.1         0     0     0

Show ospf Routing table (r1)

R1# show ip ospf route
============ OSPF network routing table ============
N    12.1.1.0/24           [10] area: 0.0.0.0
                           directly attached to r1-eth1
N    13.1.1.0/24           [10] area: 0.0.0.0
                           directly attached to r1-eth2
N    23.1.1.0/24           [20] area: 0.0.0.0
                           via 12.1.1.2, r1-eth1
                           via 13.1.1.3, r1-eth2
N    192.168.1.0/24        [10] area: 0.0.0.0
                           directly attached to r1-eth0
N    192.168.2.0/24        [20] area: 0.0.0.0
                           via 12.1.1.2, r1-eth1

============ OSPF router routing table =============

============ OSPF external routing table ===========

我們能觀察 (Routing Metric)
20 -> ospf 學到的路徑

H1 ping H2 success !!

containernet> h1 ping h2
PING 192.168.2.1 (192.168.2.1) 56(84) bytes of data.
64 bytes from 192.168.2.1: icmp_seq=1 ttl=62 time=0.169 ms
64 bytes from 192.168.2.1: icmp_seq=2 ttl=62 time=0.132 ms
64 bytes from 192.168.2.1: icmp_seq=3 ttl=62 time=0.114 ms

Test

R2-eth1 shut down

ifconfig r2-eth1 down 

eht1 interface -> 會直接 Disappear

OSPF 會快速尋徑

R1# show ip ospf route
============ OSPF network routing table ============
N    13.1.1.0/24           [10] area: 0.0.0.0
                           directly attached to r1-eth2
N    23.1.1.0/24           [20] area: 0.0.0.0
                           via 13.1.1.3, r1-eth2
N    192.168.1.0/24        [10] area: 0.0.0.0
                           directly attached to r1-eth0
N    192.168.2.0/24        [30] area: 0.0.0.0
                           via 13.1.1.3, r1-eth2

Traceroute

root@ubuntu:/home/user/server-test/test-quagga-ospf# traceroute 192.168.2.1
traceroute to 192.168.2.1 (192.168.2.1), 30 hops max, 60 byte packets
 1  192.168.1.254 (192.168.1.254)  0.073 ms  0.021 ms  0.022 ms
 2  13.1.1.3 (13.1.1.3)  0.240 ms  0.030 ms  0.025 ms
 3  23.1.1.2 (23.1.1.2)  0.049 ms  0.027 ms  0.028 ms
 4  192.168.2.1 (192.168.2.1)  0.050 ms  0.042 ms  0.040 ms