6 good questions and answers about "IS-IS - Areas in IS-IS"
-L1 routes from it's own area
-L1 link-state database injected into its L2 LSP (not leaked)
-P partition bit (not implemented)
SPF router's will ignore the sending router when computing shortest path
To the router can not be a transit router but the directly connect networks can still be reached.
L2 network do not discriminate between L1 networks and external L1 networks.
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