Net Link States TYPE2 ,由DR产生,在本AREA内传播(不仅仅在本地链路传播)。
BDR在成为DR之前不会产生该LSA。
老的DR断掉,BDR成为了新的DR:
r3#show ip ospf database network
OSPF Router with ID (10.0.0.3) (Process ID 1)
Net Link States (Area 0)
LS age: 732 //老的DR产生的LSA2,因为老的DR已经突然断开,根据OSPF的规则,LSA的删除需要始发路由器,因此该LSA在OSPF的数据库中无法删除,只有等自然老化。或者是该路由器重新接入(即使介入后是DOTHER也会刷新掉该LSA)。
Options: (No TOS-capability, DC)
LS Type: Network Links
Link State ID: 10.0.1.1 (address of Designated Router)
Advertising Router: 10.0.0.1
LS Seq Number: 80000006
Checksum: 0x4DA8
Length: 36
Network Mask: /24
Attached Router: 10.0.0.1
Attached Router: 10.0.0.2
Attached Router: 10.0.0.3
Routing Bit Set on this LSA
LS age: 118
Options: (No TOS-capability, DC)
LS Type: Network Links
Link State ID: 10.0.1.2 (address of Designated Router) //新的DR产生的LSA2,看到邻居表已经没有10.0.0.1 了。
Advertising Router: 10.0.0.2
LS Seq Number: 80000001
Checksum: 0x8A7D
Length: 32
Network Mask: /24
Attached Router: 10.0.0.2
Attached Router: 10.0.0.3
r3#
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