—————————————-
OSPF LAB 5
—————————————-
NOTES:
Network slash and subnet:
/32 255.255.255.255 has only 1 IP address for like loopback IP, for device.
/31 255.255.255.254 has 2 IP address for point to point to link. 1 device within LAN to WAN.
/30 or 255.255.255.252 can have 4 IP, this is for connecting 2 devices together, like a router to router within LAN.
/29 or 255.255.255.248 can have 8 IP, 4 devices and 3 extra IP
/28 or 255.255.255.240 can have 16 IP, 8 devices and 5 extra IP
/27 or 255.255.255.224 can have 32 IP, 16 devices and 13 extra IP
/26 or 255.255.255.192 can have 64 IP, 32 devices and 29 extra IP
/25 or 255.255.255.128 can have 128 IP, 48 devices and 61 extra IP
/24 or 255.255.255.0 can have 190 IP, 96 devices and 93 extra IP
/23 or 255.255.254.0 can have 254 IP, 128 devices and 125 extra IP
————————–
Please see below topology:
192.168.1.0/30
255.255.255.252
Clue example:
a Transit Network: Router link to another router.
-Designated Router address: 192.168.4.1 is the next router that this router is connecting to.
-Router Interface address: 192.168.4.2 is the interface of this router ip address assigned.
—
—
-a Stub Network: is connecting into a switch or another off network router, the interface status is unknown.
-Link State ID: 0.0.0.x is the router ID
————————–
*The challenge is can you use only command to build out the network below.
Just imagine when you go into a company and that company has NO network diagram topology for you to look at.
How would you build a network diagram base on this 3 commands below?
sh ip pro
sh ip ospf data
sh ip ospf dat router 0.0.0.x
Just imagine when you go into a company and that company has NO network diagram topology for you to look at.
How would you build a network diagram base on this 3 commands below?
sh ip pro
sh ip ospf data
sh ip ospf dat router 0.0.0.x
————————–
========================================
R1:
========================================
conf t
int f2/0
ip add 192.168.1.2 255.255.255.252
shut
no shut
exit
int f3/1
ip add 192.168.7.2 255.255.255.0
shut
no shut
exit
router ospf 1
router-id 0.0.0.1
network 192.168.1.0 0.0.0.255 area 0
network 192.168.7.0 0.0.0.255 area 0
end
show ip int br
show ip pro
sh ip ospf data
sh ip ospf dat router 0.0.0.1
wr
!Link connected to: a Stub Network
! when a link of .7 is link to a Switch a non-router link
! or a Router link is DOWN
========================================
R2:
========================================
conf t
int f3/0
ip add 192.168.1.1 255.255.255.252
shut
no shut
exit
int f2/0
ip add 192.168.3.1 255.255.255.248
shut
no shut
exit
router ospf 1
router-id 0.0.0.2
network 192.168.1.0 0.0.0.255 area 0
network 192.168.3.0 0.0.0.7 area 0
end
show ip int br
show ip pro
sh ip ospf data
sh ip ospf dat router 0.0.0.2
wr
!Link connected to: a Transit Network
! when a link of .3 is link to a Router link
========================================
R5:
========================================
conf t
int f3/0
ip add 192.168.4.1 255.255.255.252
shut
no shut
exit
int f2/0
ip add 192.168.3.3 255.255.255.248
shut
no shut
exit
router ospf 1
router-id 0.0.0.5
network 192.168.4.0 0.0.0.255 area 0
network 192.168.3.0 0.0.0.7 area 0
end
show ip int br
show ip pro
sh ip ospf data
sh ip ospf dat router 0.0.0.5
wr
!Link connected to: a Transit Network
! when a link of .4 is link to a Router link
========================================
R6:
========================================
conf t
int f3/1
ip add 192.168.4.2 255.255.255.252
shut
no shut
exit
int f3/0
ip add 10.10.10.1 255.255.255.252
shut
no shut
exit
router ospf 1
router-id 0.0.0.6
network 192.168.4.0 0.0.0.255 area 0
network 10.10.10.0 0.0.0.255 area 0
redis
end
show ip int br
show ip pro
sh ip ospf data
sh ip ospf dat router 0.0.0.6
wr
!Link connected to: a Transit Network
! when a link of 10 is link to a Router link
========================================
R3:
========================================
conf t
int f3/0
ip add 192.168.2.1 255.255.255.252
shut
no shut
exit
int f3/1
ip add 192.168.5.1 255.255.255.252
shut
no shut
exit
int f2/0
ip add 192.168.3.2 255.255.255.248
shut
no shut
exit
router ospf 1
router-id 0.0.0.3
network 192.168.2.0 0.0.0.255 area 0
network 192.168.5.0 0.0.0.255 area 0
network 192.168.3.0 0.0.0.7 area 0
end
show ip int br
show ip pro
sh ip ospf data
sh ip ospf dat router 0.0.0.3
wr
!Link connected to: a Transit Network
! when a link of .3 is link to a Router link
========================================
R4:
========================================
conf t
int f2/0
ip add 192.168.2.2 255.255.255.252
shut
no shut
exit
int f3/0
ip add 192.168.6.1 255.255.255.248
shut
no shut
exit
int f3/1
ip add 192.168.8.1 255.255.255.0
shut
no shut
exit
router ospf 1
router-id 0.0.0.4
network 192.168.2.0 0.0.0.255 area 0
network 192.168.6.0 0.0.0.255 area 0
network 192.168.8.0 0.0.0.255 area 0
end
show ip int br
show ip pro
sh ip ospf data
sh ip ospf dat router 0.0.0.4
wr
!Link connected to: a Transit Network
! when a link of .3 is link to a Router link
========================================
R7:
========================================
conf t
int f3/0
ip add 192.168.5.2 255.255.255.252
shut
no shut
exit
int f2/0
ip add 192.168.6.2 255.255.255.248
shut
no shut
exit
router ospf 1
router-id 0.0.0.7
network 192.168.5.0 0.0.0.255 area 0
network 192.168.6.0 0.0.0.255 area 0
end
show ip int br
show ip pro
sh ip ospf data
sh ip ospf dat router 0.0.0.7
wr
!Link connected to: a Transit Network
! when a link of .3 is link to a Router link
========================================
—-END—–
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