ospf实验报告
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OSPF LSA 实验
1、配置完r1后查看database表，发现只有第一类的
r1#sh ip os d
OSPF Router with ID (1.1.1.1) (Process ID 1)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
1.1.1.1 1.1.1.1 10 0x80000001
0x00242B 2
2、如果你想查看一下明细，可以用下面这个命令：
r1#sh ip os d router
OSPF Router with ID (1.1.1.1) (Process ID 1) Router Link States (Area 0)
LS age: 49
Options: (No TOS-capability, DC)
LS Type: Router Links //一类LSA
Link State ID: 1.1.1.1
Advertising Router: 1.1.1.1
LS Seq Number: 80000001
Checksum: 0x242B
Length: 48
Number of Links: 2
Link connected to: a Stub Network
(Link ID) Network/subnet number: 13.13.13.0
(Link Data) Network Mask: 255.255.255.0
Number of TOS metrics: 0
TOS 0 Metrics: 64
Link connected to: a Stub Network
(Link ID) Network/subnet number: 12.12.12.0
(Link Data) Network Mask: 255.255.255.0
Number of TOS metrics: 0
TOS 0 Metrics: 64
3、配置完r2后查看邻居表如下：发现state 是但是没有DR.BDR
的选举，因为这不是一个MA的网络
r2#
*Dec 20 17:37:42.731: %SYS-5-CONFIG_I: Configured from console
by console
r2#sh ip os nei
Neighbor ID Pri State Dead Time Address Interface
1.1.1.1 0 FULL/ - 00:00:35
12.12.12.1 Serial1/0
4、配置完区域零后在看邻居表发现有DR 的选举，，这是因为存
在MA 的网络
r2#sh ip os nei
Neighbor ID Pri State Dead Time Address
Interface
3.3.3.3 1 FULL/DR 00:00:39 23.23.23.3 FastEthernet2/0
1.1.1.1 0 FULL/ - 00:00:39 1
2.12.12.1 Serial1/0
5、再看database 表发现两种类型的lsa ，后者是由dr通告的这
是因为
r2#sh ip os d
OSPF Router with ID (2.2.2.2) (Process ID 1)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
1.1.1.1 1.1.1.1 210 0x80000007
0x00D278 4
2.2.2.2 2.2.2.2 171 0x80000006
0x003A67 3
3.3.3.3 3.3.3.3 172 0x80000002
0x00C6CE 3
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
23.23.23.3 3.3.3.3 172 0x80000001
0x00B21F
6、起下面的区域了查看数据库表
r2#
r2#sh ip os d
OSPF Router with ID (2.2.2.2) (Process ID 1)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
1.1.1.1 1.1.1.1 837 0x80000007
0x00D278 4
2.2.2.2 2.2.2.2 108 0x80000007
0x003B64 3
3.3.3.3 3.3.3.3 799 0x80000002
0x00C6CE 3
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
23.23.23.3 3.3.3.3 799 0x80000001
0x00B21F
Summary Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
24.24.24.0 2.2.2.2 104 0x80000001
0x006C40
Router Link States (Area 24)
Link ID ADV Router Age Seq# Checksum Link count
2.2.2.2 2.2.2.2 68 0x80000002