TP-Link T2700G-28TQ T2700G-28TQ User Guide V1 - Page 202
LSA, Network Summarization LSA, and so on. In the following, all, Link State Type, Advertising Router
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4. LSR Packet During the synchronization of the link state database between two routers, if one router finds an updated LSA or an LSA it doesn't have in the DD packet forwarded, it could send a LSR packet to request for a complete LSA. Figure 10-42 LSR Packet 1) Link State Type: The type of LSA. There are 11 types of LSA in total: Router LSA, Network LSA, Network Summarization LSA, ASBR Summarization LSA, and so on. In the following, all these would be introduced in details. 2) Link State ID: It has different meanings for different types of LSA. The Link State ID of Router LSA stands for the ID of advertising router; that of Network LSA stands for the interface IP address of the DR; and that of Network Summarization LSA stands for the IP address of the network or subnet advertised; and etc. 3) Advertising Router: Router ID of the router advertising this LSA. 5. LSU Packet When one router receives an LSR, it would send an LSU packet to inform the other the complete LSA information. The router receiving the LSA update will re-encapsulate this LSA and then flood it. 190