Earning your CCNP certification and pass the BSCI exam is knowing that the details of many Cisco technologies, ISIS, first of all. This allows you to prepare for the exam success, here is a list of ISIS terminology and basic concepts that are provided to help in this tough exam. Enjoy!
ISIS Conditions:
Domain: the section of the network under common administrative control
Area: logical segment of the network of neighboring routers and data links
IntermediateSystem: A router.
End of the system: a host device.
The four levels of ISIS routing:
Level 0: ES-is routing on the same subnet.
Level 1: IS-IS routing in the same area.
Level 2: IS-IS routing in the same domain.
Level 3: Inter-Domain Routing Inter-Domain Routing Protocol (IDRP) performed.
ISIS adjacency Possibilities:
L1: Can form adjacency with an L1 in the same area and any L1/L2 in the same area.
L2: Can form adjacency with any L2 inArea and with a L1/L2 in each area.
L1/L2: Can an L1 adjacency with the same area, L1/L2 formed in each of these areas, and L2 in any area.
A router interface SNPA (Subnetwork point of attachment) is the highest number DLCI on a network structure and if there is a season when the interface MAC address on an Ethernet segment.
ISIS Hello Types:
ESH: ES Explore hello - Posted by end systems to a router.
ISH: IS Hello - Send by intermediate systems to announce their presence.End Systems listen for these.
Being IIH: IS-IS hello to know - from one side of another. Greetings This makes IS-IS adjacencies possible.
Good luck on your CCNP exams!
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