Hello, I think it is a common issue for CACTI and some virtual interfaces. When Cacti generates DataSource as it described in DataQueries it uses |query_ifSpeed| for rrd_maximum field of the DataSource. Then somthing going wrong with interface speed determination.
In this case problem in the "SNMP - Interface Statistics" DataQuerу. And you can try to remove rule for the rrd_maximum field.
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When moving from OSPFv2 to OSPFv3, there are many changes in the format of the LSAs Type, but the most known changes are: IP prefix informations are no longer carried in Type-1 LSA and Type-2 LSA, new LSAs Type 8 and 9 are added to carry these prefixes.
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Question 1: What are the OSPF Loop Prevention Mechanisms
In single area, the routers have the Link State Database, having the same LSDB helps the routers to build a loop-free topology.
Now in a multiarea topology, the ABRs are respon...