bài báo cáo LSA và NETWORK TYPES

GVHD: Nguy Ng  Bài Báo Cáo
SVTH: Phạm Văn Dũng _12201036_C12QM13 Page 1

MỤC LỤC
1 LSA 4
1.1 Gii Thiu V OSPF 4
1.2 Metric Ca OSPF 4
ng Ca OSPF 4
1.4 Các Gói Ca OSPF 4
1.5 Multi-Area 4
1.6 Nguyên Tc Hong Cáu OSPF 5
c V LSA 6
1.8 Hong Ca LSA 6
1.9 Các Lop LSA 7
1.9.1 Type 1. Router LSA 7
1.9.2 Type 2. Network LSA 11
1.9.3 Type 3. Summary Network 13
1.9.4 Type 4 & Type 5 16
1.9.5 Type 6. Group Membership 23
1.9.6 Type 7. NSSA 25
1.10 Quá Trình Chn DR Và BDR 29
1.11 Router ID 30
1.12 Link State 30
1.13 Mô Hình 31
1.14 Các Type ca OSPF 31
1.14.1 R1 31
1.14.2 R2 32
1.14.3 R3 32

GVHD: Nguy Ng  Bài Báo Cáo
SVTH: Phạm Văn Dũng _12201036_C12QM13 Page 2


1.15 Show Ip OSPF Neighbor 33
1.15.1 R1 33
1.15.2 R2 34
1.15.3 R3 34
1.16 Show Ip OSPF Border-routers 35
1.16.1 R1 35
1.16.2 R2 35
1.16.3 R3 36
1.17 Show Ip OSPF 1 36
1.17.1 R1 36
1.17.2 R2 37
1.17.3 R3 37
1.18 Config 38
1.18.1 R1 38
1.18.2 R2 41
1.18.3 R3 44
1.18.4 R4 47
2 NETWORK TYPES 50
2.1 Gii Thiu V Network Types Trong OSPF 50
2.2 Multicaccess 50
2.3 Point-To-Point 51
2.4 Broadcast 52
2.5 Non-Broadcast 52

GVHD: Nguy Ng  Bài Báo Cáo
SVTH: Phạm Văn Dũng _12201036_C12QM13 Page 3

2.6 OSPF Broadcast Network 53
2.7 Designated Router and Backup Designated Router 55
2.8 Election Of DR/BDR 56
2.9 Point-To-Multipoint 57
2.10 ng Truyn D 58
2.11 Mo Hình 59
2.12 Config 59
2.12.1 R1 59
2.12.2 R2 62
2.12.3 R3 65
2.12.4 R4 67
2.12.5 R5 70

GVHD: Nguy Ng  Bài Báo Cáo
SVTH: Phạm Văn Dũng _12201036_C12QM13 Page 4


1 LSA
1.1 Giới Thiệu Về OSPF
   -

-

gous network)


-text

1.2 Metric Của OSPF





1.3 Môi Trường Của OSPF
Multiple access (ethernet)
Point-to-point
NBMA (Non-Broadcast Multiple Access).
1.4 Các Gói Của OSPF
1.Hello.
2.Link State Database Description (LSDB).
3. Link State Request(LSR).
4. Link State Update (LSU).
5. Link State Acknownledgement (LSA).
1.5 Multi-Area


+ 



thông qua backbone area (area 0).
GVHD: Nguy Ng  Bài Báo Cáo
SVTH: Phạm Văn Dũng _12201036_C12QM13 Page 5

 thông




 

+ 
* 




  


-
database cho router. Các ro


+ 

* 
* 
 5.
1.6 Nguyên Tắc Hoạt Động Cáu OSPF

State Update và Link State Acknowledge.
- 
- Database 


- 
DBD (Database Description)
- 

- 

GVHD: Nguy Ng  Bài Báo Cáo
SVTH: Phạm Văn Dũng _12201036_C12QM13 Page 6

1.7 Sơ Lược Về LSA
LSA (Link-
thái các links





 
 
1.8 Hoạt Động Của LSA
 
 



t 






-
- rea sau


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1.9 Các Loại Thông Điệp LSA
1.9.1 Type 1. Router LSA
 
point-to-point.

+Type 1 rong

                 
         ID Link- -1
    
-LSA.







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+ -1 Router LSA:

+
                

+: 
  -
  
-

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+ [1] -  
-
 
trong quá trình tính toán t 
 
-LSA. 
-  
                 
            


 -
-

1500 byte MTU.
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  RT3:










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  - -  RT2:



1.9.2 Type 2. Network LSA


 
  Type


GVHD: Nguy Ng  Bài Báo Cáo
SVTH: Phạm Văn Dũng _12201036_C12QM13 Page 12

+ Type-2 Network- 

  ID Link-
-
LSA.

+ -LSA:


+ Type 2 Network-

GVHD: Nguy Ng  Bài Báo Cáo
SVTH: Phạm Văn Dũng _12201036_C12QM13 Page 13

Lưu ý: Type 2 Network-            
LAN. 
 
1.9.3 Type 3. Summary Network



+ Type-3 Network-Summary-
-
   
--hông
-
+Các type-3 network-summary-LSA và Type-4-
-
LSA. Cho Type-3 LSA, ID Link-State là  

khi cho Type-4 LSA, ID Link-
GVHD: Nguy Ng  Bài Báo Cáo
SVTH: Phạm Văn Dũng _12201036_C12QM13 Page 14


+  Summary-LSA

+ Type-3 Network-Summary-
 

 

 -

 

+ Lưu ý: --


-
 các tuyến đường kết nốivà các tuyến đường nội bộ khu vực 

GVHD: Nguy Ng  Bài Báo Cáo
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

-
 kết nối các tuyến đường, các tuyến đường nội bộ khu vực, và các tuyến
đường liên khu vực .

-
-LSA.

-summary-


GVHD: Nguy Ng  Bài Báo Cáo
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+  
-
 -3 LSA không kích


1.9.4 Type 4 & Type 5
Summary ASBR : 
single area.External LSA : 

GVHD: Nguy Ng  Bài Báo Cáo
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+Type-4 ASBR-Summary-
 Type-

 
-5 LSA. ID Link--4

+Type-5 AS-External-

 Type-
 Khi
-     
 ID Link--

Lưu ý : 
Không có Type-4 và Type 5 LSA khi không có      
OSPF.
-5 LSA


-5 LSA 
GVHD: Nguy Ng  Bài Báo Cáo
SVTH: Phạm Văn Dũng _12201036_C12QM13 Page 18



+ -External-LSA:

+-External-

GVHD: Nguy Ng  Bài Báo Cáo
SVTH: Phạm Văn Dũng _12201036_C12QM13 Page 19


-4
ASBR-Summary-

 



 
 
-4 ASBR-Summary-LSA và Type-5 AS-
External-

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+Lưu ý: . Type-4 LSA k

Lưu ý:       -          
ASBR. 
 


bên ngoài Type-1 (E1) và bên ngoài Type 2 


GVHD: Nguy Ng  Bài Báo Cáo
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
 






+  
RT3:


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+Bên ngoài Type-
 -


+Các số liệu về phía trước 
 Các show ip ospf br-router 

+Lưu ý: 
 E2.



+ 
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1.9.5 Type 6. Group Membership


         
 



                 
 
 Gói này
 
. Nói cách
  
 
 các gói tin
 
 
GVHD: Nguy Ng  Bài Báo Cáo
SVTH: Phạm Văn Dũng _12201036_C12QM13 Page 24

 

+
 

 
-
                
-
                
cây.    -        
 
 
  
              


ông multicast.  
 


          bao

- thành viên nhómLSA - 
                 
 
 
              
nhóm.         

 
 
   
-  cây , . 
 - 
 
 

GVHD: Nguy Ng  Bài Báo Cáo
SVTH: Phạm Văn Dũng _12201036_C12QM13 Page 25

++   khu
vực    trên
   
 


 

++  multicast bí
                 
               



   - 
- 

 

    


1.9.6 Type 7. NSSA


-- 

®


 

++ 
  
NSSA. N


  