4
OSPF
4.1.
Cisco Packet Tracer
4.2.
Cisco Packet Tracer.
4.3.
BGP, IS-IS.
50
1)
-
-vector Routing Protocols) RIP;
2)
-state Routing Protocols).
OSPF, IS-IS.
-
-
-
1)
2)
OSPF, RIP, EIGRP, IS-IS.
IGP (Interior Gateway Protocol). IGP-
-
1) 
2) 
3)
4)
-
1)
2)
MPLS-TE).
EGP (Exterior Gateway Protocol). EGP-
OSPF (Open Shortest Path First)
IGP-
ink-
89.
51
(autonomous system)
-
-state advertisement, LSA) 
-
Hello
DBD 
52
Broadband networks)
Hello 
-broadcast networks) 
Hello 
OSPF 
- 
NBMA 
OSPF 
- 
(Point-to-
NBMA |
Point-to-Multipoint. |
|
. |
1) |
. |
2) |
|
).
3) 
.
4) 
-
-
Hello-
5) 
-to-
.
6) 
53
-
7) 
.
8) 
9) 
10)
1. Down
-
2. Attempt 
3. |
Init |
|
|
H |
Hello; |
4. |
Two-way |
|
-way;
54
5. Exstart 
-
-
6.Exchange 
description LSDB;
7.Loading 
8.Full 
lly adjacent (FULL).
HelloInterval 
-
-
RouterDeadInterval 
-
Wait Timer 
rDeadInterval.
RxmtInterval 
55
4.4.
4.4.1.
4.
Cisco 
OSPF
-
4. |
|
|
|
- |
192.168.1.2/24 ( |
; PC1 |
192.168.2.2/24 |
( |
192.168.2.1); PC2 192.168.3.2/24 ( |
|
. |
|
, |
|
|
|
Desktop |
IP Configurations
IP-
4.
PC
4.
PC0
56
C:\>ipconfig |
|
|
|
|
|
|
PC. |
|
|
|
4.4.1. |
|
|
|
4.4.1 |
|
|
IP- |
|
Router0 |
Gig0/0 |
10.10.10.1 |
255.255.255.252 |
|
Gig0/1 |
10.10.11.1 |
255.255.255.252 |
|
Gig0/2 |
192.168.1.1 |
255.255.255.0 |
Router1 |
Gig0/0 |
10.10.10.2 |
255.255.255.252 |
|
Gig0/1 |
10.10.12.1 |
255.255.255.252 |
|
Gig0/2 |
192.168.2.1 |
255.255.255.0 |
Router2 |
Gig0/0 |
10.10.12.2 |
255.255.255.252 |
|
Gig0/1 |
10.10.11.2 |
255.255.255.252 |
|
Gig0/2 |
192.168.3.1 |
255.255.255.0 |
Router |
|
CLI |
no, |
Tab): |
|
Router>enable
Router#configure terminal
Router(config)#interface gigabitEthernet 0/0
Router(config-if)#ip address 10.10.10.1 255.255.255.252
Router(config-if)#no shutdown
Router(config-if)#exit
Router(config)#interface gigabitEthernet 0/1
Router(config-if)#ip address 10.10.11.1 255.255.255.252
Router(config-if)#no shutdown
Router(config-if)#exit
Router(config)#interface gigabitEthernet 0/2
Router(config-if)#ip address 192.168.1.1 255.255.255.0
Router(config-if)#no shutdown
57
Router(config-if)#exit
Router(config)#exit
Router#wr mem
Router
Router
4.
ping.
4.
PC0
4.4.2. 
OSPF
loopback-
OSPF. Loopback-
loopback-
Router0:
Router>enable Router#configure terminal
Router(config)#interface loopback 0
Router(config-if)#ip address 192.168.100.1 255.255.255.255 (192.168.100.0/32 
-
Router(config-if)#no shutdown Router(config-if)#exit
OSPF:
Router(config)#router ospf 1
58
Router(config-router)#network 192.168.1.0 0.0.0.255 area 0 (0.0.0.255
area 0)
Router(config-router)#network 10.10.10.0 0.0.0.3 area 0 Router(config-router)#network 10.10.11.0 0.0.0.3 area 0 Router(config-router)#end
Router#show running-config 
Enter
4.4.4).
4.
OSPF 
Router |
Router |
- |
|
Router
Router
Router
:
01:10:34: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.100.1 on
GigabitEthernet0/0 from LOADING to FULL, Loading Done
Router2.
Router
59