TP-Link T3700G-28TQ T3700G-28TQ V1 UG - Page 188
Authentication, Features, Netmask, Hello Interval, Router Priority, Table 10-4 Authentication Type
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Type Code Authentication Name Features 0 Non-Authentication The 64-bit authentication information fields behind are all 0. 1 Plain-text Authentication The 64-bit authentication information behind is the password to authenticate. 2 MD5 Ciphertext Authentication The Key ID, authentication data length and encryption serial number work together to perform MD5 Ciphertext Authentication Table 10-4 Authentication Type 2. HELLO Packet OSPF routers send Hello packets to each other to find neighbor routers in the network and to maintain the mutual adjacency relationship. Only when two routers send Hello packets carrying the same interface parameters, can they become neighbors. Figure 10-39 HELLO Packet 1) Netmask: Netmask of the router interface forwarding Hello packet. Only when the netmask of the forwarding interface and that of the receiving interface coincide, can these two routers be neighbors. 2) Hello Interval: Interval of a sequence of Hello packets sending by the forwarding interface. Only the routers with the same Hello interval can become neighbors. 3) Router Priority: This field decides the election result for DR/BDR in the network segment. The greatest value means the highest priority of the advertising router and also the possibility of being elected as the DR in the segment, while the value 0 means no election right. 177