OSPF events debugging is on rtrB#
03:55:35: OSPF: Rev pkt from 10.1.1.1, SerialO : Mismatch Authentication type, nput packet specified type 0, we use type 1
03:55:40: OSPF: Rev hello from 188.8.131.52 area 0 from Seriall 10.1.1.6
Routers B and C are using type 1 authentication (simple password) and Router A is using type 0 authentication (none).
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