Answers to Chapter 6 Review Questions
| 1: | What protocol was IS-IS originally designed to provide routing information for? |
| A1: | Connectionless Network Service (CLNS). |
| 2: | Where can summarization take place in IS-IS? |
| A2: | On any L2 router. |
| 3: | How many levels of routing are there in an IS-IS network? |
| A3: | Two. L1 and L2. |
| 4: | How many pseudonodes are allowed in an IS-IS area? |
| A4: | 255. |
| 5: | Is it possible to overflow the LSP database on a router? What are the indications that this is occurring? |
| A5: | Yes. The overflow bit will set in LSAs advertised by the router with the database that has overflowed. |
| 6: | What is the range of internal metrics in IS-IS? What is the range of external metrics in IS-IS? Why is this a problem in a large-scale network? |
| A6: | Internals 0–63, Externals ... |
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