IS-IS and OSPF: Network Design Comparisons and ... - JANOG
IS-IS and OSPF: Network Design Comparisons and ... - JANOG
IS-IS and OSPF: Network Design Comparisons and ... - JANOG
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Stub Areas<br />
• Trade routing precision for improved scalability<br />
• <strong>OSPF</strong><br />
• Stub areas eliminate type 5 LSA load<br />
• Totally stubby areas extend the concept<br />
• All area routers must underst<strong>and</strong> stubbiness<br />
• <strong>IS</strong>-<strong>IS</strong><br />
• L1 routers are “totally stubby” by default<br />
• Attached (ATT) set by L1/L2 router