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Link ID ADV Router Age Seq# Checksum
2.2.2.2 92.2.2.2 1568 0x80000002 0x00CB05
3.3.3.3 92.2.2.2 436 0x80000005 0x00FBC3
4.4.4.4 92.2.2.2 436 0x80000005 0x00502B
23.1.1.0 92.2.2.2 1568 0x80000002 0x005D23
34.1.1.0 92.2.2.2 436 0x80000005 0x002C3C
100.1.1.0 92.2.2.2 505 0x80000001 0x005416
Summary ASB Link States (Area 1)
Link ID ADV Router Age Seq# Checksum
94.4.4.4 92.2.2.2 3 0x80000001 0x00A97B
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
5.5.5.0 94.4.4.4 10 0x80000001 0x008D99 0
45.1.1.0 94.4.4.4 14 0x80000001 0x00DF27 0
是不是多出了两个不同类型的LSA,summary ASB就是四类LSA,用来通告谁是ASBR
而下面type-5 就是 AS External LSA就是AS域外LSA
我们看RIP进程的路由宣告进了OSPF了。它的传输范围是整个AS域内
通告者就是ASBR,在这里就是R4
通告内容为纯路由信息,看下和3类LSA的纯路由信息有什么不同
show ip ospf database external
OSPF Router with ID (91.1.1.1) (Process ID 110)
Type-5 AS External Link States
Routing Bit Set on this LSA
LS age: 336
Options: (No TOS-capability, DC)
LS Type: AS External Link
Link State ID: 5.5.5.0 (External Network Number )
Advertising Router: 94.4.4.4
LS Seq Number: 80000001
Checksum: 0x8D99
Length: 36
Network Mask: /24
Metric Type: 2 (Larger than any link state path)
TOS: 0
Metric: 20
Forward Address: 0.0.0.0
External Route Tag: 0
Routing Bit Set on this LSA
LS age: 336
Options: (No TOS-capability, DC)
LS Type: AS External Link
Link State ID: 45.1.1.0 (External Network Number )
Advertising Router: 94.4.4.4
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