Case Study: Multiple EIGRP ASs
One design used commonly in EIGRP to limit query range and improve stability is multiple ASs—but is this really effective? Look at Figure 7-19 for some answers.
Begin by assuming that Router D is redistributing all the routes from AS 100 into AS 200 and all the routes from AS 200 into AS 100. If Router C loses its direct connection to 172.30.9.0/24, it will note that it has no feasible successor, place the destination in active state, and query each of its neighbors.
Figure 7-19. Multiple EIGRP ASs
When Router D receives this query, what action will it take? It will look through its topology table and, seeing ...
Get Advanced IP Network Design (CCIE Professional Development) now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
