IS-IS - Areas in IS-IS
6 important questions on IS-IS - Areas in IS-IS
What do L2 router advertise?
-L1 routes from it's own area
-L1 link-state database injected into its L2 LSP (not leaked)
What are the three flags used with IS-IS?
-P partition bit (not implemented)
-ATT Attached
What does the IS-IS ATT flag when the bit is set?
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When is the overload bit used and what happens when it is set to 0?
SPF router's will ignore the sending router when computing shortest path
What will still be used in SPF when overload bit is set to 0?
To the router can not be a transit router but the directly connect networks can still be reached.
What is the difference for a L2 router between a L1 route or a L1 route external route?
L2 network do not discriminate between L1 networks and external L1 networks.
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