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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LSA Scalability: <strong>OSPF</strong><br />
• Famous “rules of thumb” carry little real meaning<br />
• 64 KB maximum LSA size<br />
• Only router (type 1) LSAs likely to grow large<br />
• 24 bytes of fixed fields<br />
• 12 bytes to represent each link<br />
• 5,331 links, maximum (but isn’t this enough?)<br />
• Types 3, 4, 5, 7 LSAs<br />
• One destination prefix per LSA<br />
• Be careful what you redistribute!
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