Cisco CCNP and CCIE Study Notes

Given the following output from the show isis neighbor command from a network where all the routers are level-1-2 routers running IS-IS, identify which of the neighbors of R1 the same area as R1 and which are in other areas?

R2#sh isis neighbors

System Id      Type Interface IP Address      State Holdtime Circuit Id
R1             L1L2 Se2/0     10.10.10.1      UP    28       00
R3             L1   Et0/0     20.20.20.3      UP    22       R5.01             
R4             L1   Et0/0     20.20.20.4      UP    27       R5.01             
R5             L1   Et0/0     20.20.20.5      UP    8        R5.01             
R8             L2   Se3/0     50.50.50.1      UP    21       00