9 good questions and answers about "IS-IS Operation over Broadcast Links"
-In case of tie; Router with highest SNPA (Sub network Point of Attachment)
-In case SNPAs are not comparable (frame relay/ATM) Router with highest system ID.
What are the priority values ?
What priority value is better?
priority priority [level] 0 127
higher is better
-Representing the broadcast segment in the link-state database as a standalone object; the Pseudonode
-Router does not have an LSP with the indicated LSPID in its link-state database or sequence number on DIS is higher
-Router has an LSP with the same LSPID in its link-state database but its sequence number on the DIS is lower or the DIS not advertise this LSPID.
-No additional adjacency necessary ( all routers are fully adjacent)
-Pseudonode LSP will be replaced by the new elected DIS
-Routers will update their LSPs to point toward the new Pseudonode LSP
-Router LSP , the System-ID carries the ID of the router and the Pseudonode is set to 0
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